Edwards APGX-H-NW25 (Stainless Steel) Linear Convection Vacuum Gauge has a wide measuring range from 1333 to 3 x 10-4 mbar (1000 to 2.3 x 10-4 Torr). The use of APGX-H-NW16 convection technology ensures accuracy and sensitivity are maintained to the top of the range.

The Edwards APGX-H-NW25 is compact and may be mounted in any orientation, simplifying installation where space is limited. The gauge incorporates a setpoint and two LEDs, which indicate setpoint and gauge status.

The Edwards APGX-H-NW25 uses the constant temperature principle in which the cooling effect of the gas on the filament is overcome by varying the voltage applied, which in turn maintains a constant resistance and keeps the circuit in equilibrium. This voltage is therefore a measure of the pressure in the gauge tube. It should be noted that different gasses have different thermal properties and as such the output of Edwards APGX-H-NW16 is gas dependant.