MKS GRANVILLE-PHILLIPS Vacuum Pressure Gauge 275553-GQ-T 275 Mini-Convectron

The Granville-Phillips 275 Mini-Convectron (by MKS Instruments) is an industry-leading convection-enhanced Pirani gauge. Designed for high-accuracy measurement from atmosphere down to the millitorr range, the 275 series utilizes convection cooling at higher pressures. This provides significantly faster response times and superior accuracy between 10 Torr and atmosphere compared to standard thermal conductivity gauges.

This specific model, 275553-GQ-T, features a compact, rugged stainless steel design and a 1/8" NPT threaded fitting. It is the go-to sensor for load-lock venting, foreline monitoring, and general vacuum system safety interlocks. Its "Mini" form factor allows for installation in tight gas panels and manifold spaces where full-sized gauges cannot fit.