PG105 Convection Enhanced Pirani
The SRS PG105 is a convection-enhanced Pirani gauge (CEPG) manufactured by Stanford Research
Systems. When used with an IGC100 controller the PG105 provides a convenient, reliable and low-cost
measurement of vacuum over a wide pressure range extending from atmosphere to 10-4 Torr.
This appendix provides a detailed description of the principle of operation, construction, gas dependence,
calibration and fundamental strengths and weaknesses of the PG105 gauge head. Application examples
and a few practical tips are provided along the way. Basic maintenance and troubleshooting information
are also included.
Since it is not possible to cover this complex gauge in such a short note, a comprehensive list of
references is provided at the end.
In This Application Note
Principle of Operation 3 Contamination |