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What's I n This Catalog: For More Information:
many ways Hewlett-Packard can any HP product is yours for the
help solve your measurement asking. Use the Information As-
problems in the opening pages. sistance Request Cards between
They describe the company, pages 400 and 401.
give some information about the
HP capabilities that are beyond
this catalog's scope, list local
Catalog Prices:
offices, give facts on HP ser- PRICES which appear in this
vices, and tell you how to order. catalog apply only to domestic
There is an alphabetical index USA customers; they were cur-
and an index by model number, rent when approved for printing
to help locate solutions to mea- and do not include applicable
surement, analysis, or computa- surcharges on imported prod-
tion problems. NEW HP products ucts. Where prices are not given,
are flagged and noted by the or for latest price information,
word NEW in bold, blue type c a l l your nearest H e w l e t t -
throughout. Packard sales office.

Printed in U.S.A.
. ,.



About Hewlett-Packard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B
Delcon Telephone Cable Maintenance Instruments . . . . . . . . . 1
Medical Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Analytical Instruments and Systems . . . . . . . . . . . . . . . . . . . . 4
Sales and Service Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
H o w T o Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Alphabetical Index of Products . . . . . . . . . . . . . . . . . . . . . . . 12

Model Number Index of Products . . . . . . . . . . . . . . . . . . . . . 18

Product Sections
Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Measuring Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Oscilloscopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Recorders, Printers and Couplers . . . . . . . . . . . . . . . . . . . . . . . 172
Electronic Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Frequency and Time Standards . . . . . . . . . . . . . . . . . . . . . . . . 235
Signal Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Microwave Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Communications Test Equipment . . . . . . . . . . . . . . . . . . . . . . 345
Network Analyzers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Automated Network Analyzers . . . . . . . . . . . . . . . . . . . . . . . . 370
Signal Analyzers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371
Automated Spectrum Analyzers . . . . . . . . . . . . . . . . . . . . . . . 381
Automated Noise Monitoring Systems . . . . . . . . . . . . . . . . . . . 395
Computers and Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . 399
Information/Assistance Request Card . . . . . . . . . . . . . . . . . . . 401A
Automated Test Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 405 .
Electronic Calculators and Peripherals . . . . . . . . . . . . . . . . . . . 408
Solid State Components and Circuits . . . . . . . . . . . . . . . . . . . . 410
Temperature Measuring Instruments . . . . . . . . . . . . . . . . . . . . 412
Cabinets and Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414

Information/Assistance Request Card . . . . . . . . . . . . . . . . . 401A


Hewlett-Packard is a major designer and manufacturer of T h e company has also shown leadership in manufacturing
electronic, medical, analytical, and computing instruments and techniques, developing many innovations that make it possible
systems. From its founding in 1939, the company has con- to offer high quality products a t moderate cost. Engineering and
scientiously followed its basic philosophy of offering only prod- production of solid-state devices, integrated circuits, and hybrid
ucts representing significant technological advancements. T h e microcircuitry are prime examples. In many cases, specialized
company's first instrument-an economically priced audio os- equipment is required for the production of these components
cillator far more stable and easier to use than any such instru- as well as other unique parts. Often this equipment is designed
ment available at the time-met this demanding criterion, as and built in-house either because it is not available on the out-
have the many Hewlett-Packard products that have followed. side, or because it allows Hewlett-Packard an extra measure
The company manufactures more than 2,000 products, most of control in maintaining the quality and performance expected
of which fall into the category of electronic test and measure- of its products.
ment equipment. This includes many of the "work-horse" prod-
ucts such as oscillators, voltmeters, oscilloscopes, counters, and Hewlett-Packard is a well-established, multi-national com-
microwave equipment, as well as a variety of instruments and pany that has controlled its growth so that expansion i s fi-
systems for specialized applications. nanced generally from income on a pay-as-you-go basis. From
However, the company has also entered several additional its modest beginnings in Palo Alto, California, the company
and important new product areas over the course of the years, now has nine manufacturing plants in California, two in Colo-
and today the company name is seen on instruments and sys- rado, two in N e w Jersey, one in Pennsylvania and one in Mas-
tems for medical diagnosis and monitoring, on others for bio- sachusetts. Hewlett-Packard's overseas manufacturing facilities
physical and chemical measurement and analysis, and on an are located in Scotland, West Germany, France, Japan, and
impressive selection of solid-state devices. Singapore.
The growth in the amount of data generated within our tech- However, for the customer, Hewlett-Packard is no farther
nically-oriented society, and the increasing need to automate away than the nearest telephone. There are more than 50 field
testing and control functions, led Hewlett-Packard in recent offices in the United States, and the company's products are
years into the field of computational equipment. The company marketed in over 100 countries abroad. All of these offices offer
now offers an impressive family of general purpose digital com- immediate assistance in solving measurement problems and pro-
puters, and electronic calculators and systems. Hewlett-Packard viding advice on equipment selection, or with any help needed
computers easily interface with the company's electronic test to keep equipment already in service in first-class operating con-
and measuring instruments to form data acquisition and auto- dition. The field offices are staffed by trained engineers, each
matic test systems. They are also being used increasingly from of whom has the primary responsibility of providing technical
the elementary through the university level for problem solv- assistance and data to customers. A vast communications net-
ing, computer-assisted instruction, computer science education, work has been established 10 link each field office with the
and complex model simulation. Complementing Hewlett-Pack- factories and with corporate offices. No matter what the prod-
ard's computer and calculator hardware is an extensive library uct or the request, a customer can be accommodated by a single
of software for programming purposes. As a result, Hewlett- contact with the company.
Packard's desktop calculators, like Hewlett-Packard computers,
are versatile instruments that can handle a wide variety of Hewlett-Packard is guided by a set of written objectives. O n e
special needs. of these is "to provide products and services of the greatest
To maintain its leadership in instrument technology, Hew- possible value to our customers." Through application of ad-
lett-Packard invests heavily in new product development. Re- vanced technology, efficient manufacturing, and imaginative
search and development expenditures traditionally average marketing, it is the customer that the more than 16,000 Hew-
about 10 percent of sales revenue, and some 1,500 engineers lett-Packard people strive to serve. Every effort is made to an-
and scientists are assigned the responsibilities of carrying out ticipate customer's needs, to provide products that will enable
the company's various R&D projects. As a result of this effort, him to operate more efficiently, to offer him the kind of service
about half of the company's current business is represented by and reliability that will merit his highest confidence, and to
products that were not in existence six years ago. provide all of this at a reasonable price


Hewlett-Packard's Delcon Division is Ultrasonic leak detection cable and the far-end of the cable is
dedicated to the development and manu- As pressurized gas escapes through an strapped to form a bridge configuration.
facture of instruments for telephone cable aperture it creates considerable noise in The distance-to-fault result is obtained
plant maintenance. Of prime interest is the ultrasonic region of 36 to 44 kHz. by a simple sequence of adjustments of
the location of physical damage to the The Delcon Ultrasonic Translator De- the instrument controls. The 4912F is
cable. tector (such as Model 4905A) detects battery powered, light and compact. It is
Fault location has become an especially this characteristic sound with a sensitive, housed in a rugged fiberglass case and is
acute problem in recent years as more directional Barium Titanate microphone designed to withstand the demands of
cable is placed underground. Although and translates the signal to audio by field use.
better protected from the environment, mixing it with a 40 kHz local oscillator Similar in construction and operation
the cable is subject to new dangers and signal. The audio signal is then amplified to the 4912F, the Model 4910F Open
the telephone craftsman is faced with and monitored on a speaker and level Fault Locator is designed to provide di-
locating damage hidden by several feet meter. rect distance readings to open faults in
of earth. In addition, higher traffic den- To detect leaks in aerial cables, the paired telephone cable. The 4910F oper-
sity on cables and demands for higher craftsman merely scans the cable from ates on a capacitance charge sampling
quality transmission have placed more the ground with the flashlight-size micro- principle. Since the capacitance per unit
emphasis on cable reliability and quality. phone, listening for the characteristic length of a pair is known for a particu-
From the standpoint of the cable main- hissing sounds of a leak. By simulta- lar type of cable, this capacitance can be
tenance supervisor, fault location prob- neously observing the level meter, he can related to the length of the pair. The
lems can be divided into five categories: "peak in" on the leak and determine its 4910F measures this length by charging
exact location. Pole mounted accessories the pair capacity, C,, with a known dc
1. Maintaining the integrity of pressur- voltage; transfering a portion of this
are also available for closer scanning of
ized cable systems. Since pressuriza- charge to a standard capacitor, C,, in the
the cable.
tion is a preventive measure to keep Leaks in ducted underground systems instrument for a given length of time;
moisture out of the cable, it is essen- and measuring the charge across C, with
are located with a unique "Duct Probe"
tial that leaks be located and repaired a voltmeter calibrated in feet. This entire
accessory. Consisting of a miniature mic-
quickly before more serious damage sequence is performed automatically by
rophone connected to a system of alumi-
results. the 4910F, providing an answer in just
num rods, the Duct Probe can be used
2. Locating conductor faults before they to explore up to 500 feet into a cable a few thousandths of a second.
become catastrophic. High resistance conduit. The leak is thereby pinpointed
shorts and grounds are usually indica- precisely, permitting repair of the dam- Tone type fault locators
tive of water in the cable, which, if age with a minimum of excavation. The tone type locator, such as the
not located and repaired quickly, can Model 4904A, places a 990 Hz signal on
result in complete cable failure. Direct reading fault locators the faulted circuit which is traced by an
Fault locators that provide a direct inductive pickup coil and a sensitive
3. Locating catastrophic faults. Time and
distance-to-fault reading in feet (or tuned receiver. At the point of the fault,
location accuracy are of the essence
meters) have the benefit of relieving the the signal drops in level, thereby indicat-
in these cases in order to return the
craftsman of the drudgery of performing ing the exact physical location of the
cable to service quickly with a mini-
manual calculations. Locating faults be- fault. The tone locator also has the ad-
mum of excavation.
comes faster, requires less training and vantage of being able to precisely trace
4. Cable utilization. This problem be- is less error prone than with manual the path of the cable and, by triangula-
comes most apparent when most of bridge techniques. tion, determine its depth at any point.
the pairs in the cable have been as- The Model 4912F Conductor Fault The tone locator system is designed such
signed and it is no longer possible to Locator is a direct reading, automatic that only the transmitted signal is de-
pick up a "spare" pair to replace a calculating bridge operating on the Var- tected, so that interfering signals (such
faulty pair. Faults on abandoned pairs ley principle. This instrument is designed as power line harmonics) do not interfere
must then be located and repaired in to locate extremely high resistance shorts, with the measurement. Output power of
order to more fully utilize the cable's crosses and grounds, such as might occur the transmitter is kept low to prevent
capacity. from minute amounts of moisture in interference with other working circuits
5 . Cable path and depth determination. plastic insulated cable ( P I C ) . The 4912F in the cable and to prevent "carry-by"
This information is necessary in con- is connected to an access point on the of the signal beyond the fault.
junction with accurately locating the
fault. It is also necessary for accurately MORE INFORMATION ON DELCON PRODUCTS
marking the cable location to protect U.S.A. Customers: Delcon products are sold directly to the customer from the
it from construction and excavation manufacturing division. Please direct all orders and inquiries to:
work being performed in the vicinity Hewlett-Packard Company
of the cable. DELCON DIVISION
Delcon Division strives to solve these 333 Logue Avenue
problems with instruments that are easily Mountain View, California 94040
operated by non-technical personnel and Telephone (415) 969-0880
that will withstand the rigors of the out- Customers outside the U.S.A.: Orders should be directed to your local Hewlett-
side plant environment, Packard distributor or representative.


An evolution for an involvement ( 5 9 5 2 - 3 3 8 9 ) , of Hewlett-Packard's Med- 8800 series medical systems
Hewlett-Packard's service to the medi- ical Electronics Division ( M E D ) cur- Late in the '60's the need for moni-
cal community is at the Medical Elec- rently contains more than 250 instru- toring systems for clinical and re-
tronics Division ( M E D ) in Waltham, ments comprising patient monitors, medi- search applications became apparent. This
Massachusetts, where more than 250 cal systems (for the operating room, cath prompted Hewlett-Packard into develop-
products for health care including diag- lab, etc.), diagnostic instruments, and ing the 8800 Series of Medical Systems
nostic instruments, patient monitoring computerized medical systems. Current comprising transducers, signal condition-
equipment, medical systems instrumenta- engineering efforts are expanding to tele- ers, recorders, and other display devices.
tion, and computerized medical systems metry for progressive coronary care mon- The versatility of 8800 instrumentation
are manufactured. itoring, and monitoring equipment for permits customer configuration of sys-
new born intensive care units. tems for research, operating rooms, cath
Sanborn Company's (Hetulett-Pack-
labs, and teaching applications.
urd's predecessor) first principal products
were a water level recorder, a blood pres- 780 series patient monitors T h e equipment provides substantial
sure gauge, the Benedict Metabolism flexibility in meeting the requirements of
Continuous monitoring of coronary the individual clinician and researcher.
Tester, the first string-galvanometer elec-
and critically-ill patients is undoubtedly By combining standard sub-assemblies in
trocardiograph, and the first portable
among the most important innovations in building block fashion, virtually a limit-
ECG. These were followed by the present
line of cardiological measurement instru- patient care in the last decade. In re- less number of different configurations is
mentation, which includes several models sponse to this innovation, Hewlett-Pack- possible. These range from two-channel
of electrocardiographs, heart sound in- ard designed the 780 Series of patient systems in a small mobile cart, to highly
strumentation, and a vector-cardiography monitors for coronary care units, in- sophisticated multichannel systems in-
system. tensive care units, and recovery room cluding chart recorders, oscilloscopes, nu-
monitoring. merical readouts, analog meters, and
In 1961, Sanborn became a division of magnetic tape recorders.
Hewlett-Packard. The combined strengths The units of the 780 series electroni-
of Sanborn, with its acknowledged lead- cally monitor various physiological phe-
ership in understanding and providing
nomena such as ECG, arterial and venous
for the needs of the medical community
together with its experienced sales and pressures, temperature, and respiration.
service personnel, and Hewlett-Packard, Monitoring is done on a round-the-clock
with its leadership in development and basis; the patient is effectively never left
support of electronic instrumentation, re- alone. 780 bedside monitoring units are
sulted in well-conceived, well-designed, small, compact, self-contained instru-
and well-supported product lines. ments used to monitor various combina-
tions of patient parameters. Patient data
MED's product lines is displayed in analog or digital form on
T h e product lines, which are listed in a variety of readout devices for con-
the Medical Instrumentation Catalog venient and effortless monitoring by the
medical staff.
Because of the building block design
of the 780 Series, units can be combined
into an almost unlimited variety of sys-
tems to meet each hospital's specific mon-
itoring needs. Other advantages of the
building block approach are economy-
cost reflects only those monitoring capa-
bilities needed; and expandability-sys-
tems are easily enlarged to monitor more Diagnostic instrumentation
patients or more parameters per patient. Hewlett-Packard has developed an ex-
tensive group of instruments primarily
The Hewlett-Packard 780 Series also for clinical applications. These instru-
includes resuscitation capability. Defibril- ments monitor and/or display ECGs,
lation can be performed asynchronously VCGs, heart sounds, simultaneous fetal
for emergency treatment of ventricular ECGs and labor contractions, nerve con-
fibrillation or the defibrillator can be duction and muscle voltages, and internal
used synchronously for the elective card- body structures. This was followed by
ioversion of arrhythmias such as atrial our present single-channel electrocardio-
fibrillation or atrial flutter. Pacing can graphs which provide all solid state cir-
be done in either the fixed-rate or de- cuitry and the most modern electronic
mand (as-required-by-the-patient) mode, technology available.

Electrocardiography Computerized medical systems ECG interpretive system
Hewlett-Packard offers two 3-channel One of the goals of Hewlett-Packard's A specially-developed operating system
electrocardiographs. One allows the nurse Medical Electronics Division is to pro- controls the user's choice of two pro-
or physician to obtain a complete 12-lead vide medical systems and support that grams for ECG analysis, Mayo or
electrocardiograph automatically in ten allow the computer to be a time-saving, USPHS, each based on different diagnos-
seconds. The second unit includes facili- accurate tool of the physician and re- tic criteria and both widely field-tested.
ties for obtaining automatic cardiographs searcher. T o implement this goal, the Designed for operation by an ECG tech-
and/or provides a 3-channel display for concept of staellite, or dedicated, com- nician, the system merges patient history
electrocardiograph, p h o n o c a r d i o g r a p h puters has been developed. Separate cards with ECG records and prints his-
and pressure signals. small computers perform their functions tory, ECG, and interpretation in less than
in the various areas of the hospital-in- one minute. Results can be printed at
Electromyography both the computer site and the ECG
tensive care, cath lab, operating room,
The Hewlett-Packard compact, 2-chan- terminal location. The system also pro-
etc.-and, if desired, communicate with duces patient billing reports upon re-
ne1 clinical electromyograph provides all a larger machine containing patient files
of the sophisticated electronic gear neces- quest.
and billing information. Three total sys-
sary to do electromyography and nerve
tem packages (both hardware and soft- ICU/CCU monitoring system
conduction studies in one package. It also
utilizes a Hewlett-Packard developed ware) are currently available for medical A computerized, integrated, hardware/
variable persistence oscilloscope, which is systems applications. They are the Com- software system for patient monitoring
unique to our instrument. puterized Catheterization Laboratory, the is currently being developed and tested at
ECG Interpretive System and the Com- Peter Bent Brigham Hospital, Boston,
Diagnostic ultrasound puterized ICU/CCLJ Monitoring System. Massachusetts. This system is modular
Hewlett-Packard's oscilloscopes were Additional available software includes a in nature, making it easily adaptable to
also combined with sophisticated elec- set of 5 2 statistical programs (the "Stat- any monitoring situation. Application
tronics to provide two ,diagnostic ultra- Pac" ) written for biostatistical applica- tasks include scheduled automatic sam-
sound units. These instruments utilize the tions. pling of signals from bedside monitors
sonar principle and have found wide (ECGs, pressures, respiration, tempera-
usage in neurological and radiological ture) ; plotting trends on a scope; logging
Computerized cardiac cath lab
diagnostic procedures, while other areas nurses notes; cardiac output by dye
This package aids the physician by re- curve; pulse waveform analysis; arrhyth-
such as cardiology and obstetrics are also
ducing the analog data obtained during mia monitoring in conjunction with a
beginning to develop procedures where
diagnostic ultrasound is useful. These the cateterization procedure to a useful preprocessor; acid-base analysis; and gen-
instruments, like the Electromyograph, set of calculated values such as heart erating patient summary reports at the
can be combined with the variable per- rate, systolic and diastolic pressure end of each nursing shift.
sistence or storage scope, allowing Hew- values, pressure gradients, cardiac out-
lett-Packard to provide a unique feature put, etc. At the conclusion of the pro- Hewlett-Packard's abiding commitments
in this type of instrumentation. cedure, a report is generated for in- Responsible concern is not confined to
clusion with other patient documentation. creating designing and manufacturing
Fetal monitoring medical instruments alone. Since the ulti-
Recently, a fetal monitoring instru- mate value of medical instruments to
ment has been developed by our manu- physicians and hospital personnel must
facturing facility in Boblingen, Germany, be measured by intrinsic benefits, the ad-
in conjunction with D r . Konrad H a m - ministrative staff of Hewlett-Packard's
macher of Dusseldorf. It combines both
Medical Electronics Division has spent
the phonocardiograph and fetal ECG
techniques and allows the obstetrician to hundreds of man-years developing a
monitor fetal heart rate during the last "total concept" package, existing from
trimester of pregnancy, or at the time of the earliest stages of a medical instru-
labor, and compare it with recorded la- ment's definition and continuing through-
bor contractions. In this way, the number out the useful life of the product.
of Caesarean sections can be reduced and Currently the full-time responsibility
the baby can be continually monitored of more than 100 Hewlett-Packard pro-
during the most traumatic time of labor. fessionals, the total concept package com-
The idea of monitoring the fetus is not prises regularly scheduled training pro-
new, but instrumentation that will elim- grams, complete publications comple-
inate extransous noises and maternal ments, on-site calibration and checkout
heart sounds is, and all of this is com- procedures, extensive sales and service
bined in the new Cardiotocograph, which capabilities, emergency service loaner
uses logic circuitry to eliminate heart equipment, and systems analyst and field
sounds or other extraneous noises. engineering support.

ABOUT HEWLETT-PACKARD Gas Chromatographs and Spectrometers
For chemical analysis

Widely recognized as the nation's fore- Series 7600A Chromatograph System, dates glass U-tube columns for the an-
most supplier of electronic measuring a fully automatic G C that takes over the alysis of materials that are difficult to
instruments for the engineer, Hewlett- traditional work of the chromatographer, chromatograph. These instruments incor-
Packard is fast developing a similar posi- from sample measurement and injection porate other design features that make
tion in analytical instrumentation for the to the final report of the analysis. Operat- them especially effective with biological
scientist. Fully described in a separate ing completely unattended, it performs samples and thermally sensitive or polar
Hewlett-Packard catalog "Analytical In- the G C analysis more accurately and re- materials.
struments for Chemistry," these instru- liably than a skilled technician, at a frac-
Model 5795B Preparative GC Attach.
ments are briefly characterized in these tion of the operating cost.
ment which converts analytical GC's to
two pages. Series 7620A and 5750B Research fully automatic small-scale preparative
GC's, multiple-detector instruments that work. The 5795B is used to separate and
Gas chromatographs
permit the highest possible level of per- collect pure components for further
Although less than 20 years old, gas formance for a great variety of analyses. chemical studies, without interfering in
chromatography ( G C ) has taken over They are designed expressly for the re- any way with the gas chromatograph's
from classical and other instrumental search laboratory that requires an ex- analytical capability.
methods the bulk of analytical work per- tremely versatile instrument.
formed in laboratories around the world. Model 7670A/7671A Automatic Sam-
Series 5700A Laboratory GC, the most pler, an accessory that automates the
There is an excellent reason for the revo-
modern instrument on the market, avail- measurement and injection of samples
lutionary popularity of the gas chromato-
able in a variety of configurations for into a gas chromatograph. Operating un-
graph in analytical chemistry: no other
dedicated applications. Its modular de- attended overnight and even over week-
method gets more accurate results, at
sign makes possible the most economical ends, the 7670A/7671A reduces operat-
greater speed, and for less cost.
G C at the highest performance level for ing costs so significantly that even the
For the scientist whose interest is the
laboratories that specialize in specific smallest labs can justify its purchase.
chemical analysis of unknown samples,
analyses such as drugs, pesticides, natural
Hewlett-Packard offers four basic types Data handling
gas and air pollution.
of gas chromatographs, a more complete
line than is available from any other Series 7610A and 402B High-Effi- Since G C produces both qualitative
manufacturer in the world: ciency GC's, whose large oven accommo- and quantitative information on large

The gas chromatograph and mass spectrometer torm the most powerful tool ,available t o the scientist f o r rapid, positive and accurate analyses of unknown
samples, especially wnen they are integrated with a computer as they are i n the Hewlett-Packard GC/Mass Spec/Computer System.

L 1

numbers of complex samples in a very every two seconds, fast enough to analyze under optimum conditions of both sensi-
short time, its data output is so large every peak separated by the gas chroma- tivity and resolution at all times.
that automatic methods for handling it tograph, and stores all the analytical data The main performance characteristics
are economical if not essential. Hewlett- for as many as 1000 scans on a single of the 5950A include freedom from back-
Packard manufactures a variety of in- tape cassette. Later, the computer can ground and freedom from satellites as
struments and systems for automatic data search the cassette, find the scan of in- well as greatly improved resolution and
handling to satisfy all budget levels: terest and type out a list of every peak, sensitivity.
identifying each peak by mass number
3360A GC Data Processing System. CHN analyzer
and relative abundance.
Complete automation of the data han-
dling process is achieved with the 3360.4 The Model 185B Carbon Hydrogen
which can handle the output of up to MRR spectrometer Nitrogen Analyzer performs a complete
eight GC's simultaneously, without in- elemental analysis of organic materials
Molecular rotational resonance spec-
tervention by the chromatographer. It simultaneously and automatically in less
troscopy ( M R R ) measures the absorp-
prepares a full analytical report for each than 10 minutes. The 185 has gained
tion of microwave energy by molecules
sample and is easily operated even by considerable acceptance among micro-
in the vapor state at low pressures. The
laboratory technicians who have literally chemists, because of its ability to per-
technique has been widely used in funda-
no previous computer experience. form, even under difficult circumstances,
mental molecular research for a number
elemental analyses whose accuracy is well
of years. With the introduction of the
3370B Digital Integrator. An electronic within the accepted allowable error of
8460A MRR Spectrometer, which is easy
integrator, the 3370B automatically mea- 2 0 . 3 % , at a speed advantage of 4 to 8
to use and more versatile than previous
sures the retention time and area of each times over classical methods.
instrumentation, the technique has been
peak on a chromatogram. It presents the
extended to the analysis of complex gas Molecular weight instruments
data either on a built-in printer, on
mixtures, especially in air pollution
punched paper tape for use with time- A polymer solution invariably consists
studies and quantitative mixture determi-
share computers, or directly to a digital of a number of different molecules of
computer in real time. different chain lengths and weights. It is
Microwave absorption occurs in any
Strip Chart Recorders. Several Hew- molecule that has a permanent dipole often useful to the polymer chemist to
lett-Packard recorders are available with moment. The absorption pattern, or make different kinds of molecular weight
special input circuitry for use in G C : MRR spectrum, consists of sharp indi- determinations because each gives him a
Models 7127A, 71284, 7143A/B, 680. vidual lines which always occur at the better idea of the actual molecular weight
All solid-state instruments, they offer a same frequencies regardless of sample of the sample and also tells him some-
choice of ,one or two recording pens and composition and total pressure. Measure- thing of the distribution of the type of
five or ten-inch calibrated charts. ment resolution is so high that molecular molecules in his sample.
Hewlett-Packard manufactures a broad conformers and non-radioactive isotopes Hewlett-Packard offers the polymer
line of other data handling instruments can be separately identified. Compounds chemist a choice of two instruments to
including digital computers, program- of molecular weight up to 350 can be help him make fast and accurate mole-
mable calculators, magnetic tape record- measured. Impurities do not interfere cular weight determinations of all sizes
ers and oscillographic recorders which are and no sample preparation is required. of molecules: Model 302B Vapor Pres-
described elsewhere in this catalog. sure Osmometer for number-average
molecular weight determinations between
ESCA spectrometer 50 and 25,000; Series 500 Membrane
Mass spectrometer Electron spectroscopy for chemical an- Osmometers for the same type of de-
It is generally agreed among scientists alysis (ESCA) is a relatively new tech- termination between 10,000 and 1,000,-
that the most powerful tool for the quali- nique for measuring the binding energies 000.
tative and quantitative identification of of core and valence electrons in atoms
unknown materials is the combination of and molecules. It has great potential in Quartz thermometer
a gas chromatograph and mass spec- both structural and analytical chemistry, T h e Model 2801A Quartz Thermom-
trometer. In the Hewlett-Packard system, with applications in the study of surface eter measures absolute or differential tem-
these two instruments are fully integrated chemistry, oxidation states, molecular perature with a resolution of O.OO0lo
with a computer, further increasing their structure and chemical analysis generally. over the range -80 to +250