The 275400-1-GP-T Mini-Convectron® Modular Vacuum Gauge features a Gold Plated Tungsten sensor, a 1/8 inch NPT fitting, and a non-linear analog output. One set point relay is included for safety interlocking. Mini-Convectron® gauges combines the high precision convection enhanced Pirani gauge with electronics to provide a compact, convenient, reliable, and cost-saving solution for vacuum measurement from atmosphere to 10-4 Torr. With over 35 years of successful field installations, the Convectron® gauge has become an industry standard. It is a unique variation of thermal conductivity gauges where pressure measurement is based on the rate of heat loss from a sensor wire. Unlike traditional thermocouple and Pirani gauges that use only conductive heat loss, Convectron gauges take advantage of heat loss due to convection at higher pressures. This extends the range of accurate, repeatable measurement to atmosphere. These Granville-Phillips® vacuum gauges are ideal for applications where controller size and local control are critically important.