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Pirani Vacuum Gauge

A two-channel vacuum gauge with a digital display and analogue outputs 0 - 5 V. The set includes two PRH 01 measuring heads, connecting cables and a rack module ACC. to DIN 43 700 electronic unit, containing two analogue controllers, a microcontroller based digital LED display and button bar and a power supply. The measured pressures are displayed in an exponential format with three-digit mantissa. There are provided (optional) four programmable optoinsulated open collector outputs with user seting hysteresis and diodes on the front panel, which indicates the "ON" state.

The PIRANI VACUUM GAUGE PRVG 02 is designed for measurement and control of non-corrosive gases pressure in the range of 1.10-4 - 1.103 mbar in vacuum systems.

As a sensing element is used a thin heated tungsten filament, connected to one arm of a selfbalancing Whetstone bridge circuit, which keeps the filament temperature constant approximately to 410 K. The value of the current through the filament is proportional to the gas pressure. It is provided a temperature compensation of the "zero" and span. The three-wire connection of the gauge head with the controller provides the independence of the signal value from the cable length.


Measuring range mbar Acc. to N2 1.10-4- 1.103
Accuracy in the range 5.10-3 - 1.102 mbar % of reading 15
Analogue output V DC 0 - 5 / Rl >10kOhms
Measuring head connecting flange KF ACC. to ISO 16
Power supply V 220, 50 Hz
Power consumption VA 8


Controller mm 90 x 90 x 180
PRH 01 mm 104 x 39 x 22
Weight, total kg 1,2


  1. Relay outputs - 2 x 3 A / 220 V AC for each channel.
  2. Serial interface RS 232 / RS 485 for computer linking.

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