Differential Refrigeration Pressure gauge – Type A18

Sheet No.: 1-42 GB

Differential Refrigeration pressure gauge

  • Liquid filled
  • Connection: bottom or rear
  • Direct, wall or panel mounting
  • More than 40 different connecting threads
  • Long-term stable
  • Vibration protected
  • Many types of refrigeration scales, graded in pressure and temperature


This series of pressure gauges is well suited for application in the refrigeration industry. The differential pressure gauge is specifically intended for stamping compressors for measuring suction and oil pressure.

Furthermore, it is also applicable for measuring differential pressure over oil filters in refrigeration plants.

Module system

The TEMPRESS program of connecting nipples and mounting auxiliaries makes it possible to deliver thread type and mounting form as required.

The program of refrigeration scales cover most refrigeration media available on the market. The scale can be delivered with 1, 2 or 3 refrigeration media.

Temperature compensation

The unique system for temperature compensation ensures a correct reading even under heavily fluctuating ambient temperatures (0-60° c)


The temperature compensation system simultaneously works as blasting protection, i.e. if the measuring system blasts due to verpressure, the temperature compensation is blown out from the back of the instrument.

Pressure Gauges:DN 80 type A1802
DN 100 type A1803
Case material:


Glass face:


Steel, black enamelled

AISI 316 (only DN100)

Tempered safety glass

AISI 316

Liquid fillingGlycerine
ConnectionBrass or AISI 316
Measuring systemBrass/bronze, steel or AISI 316


-1-0+12 bar/°C
-1-0+25 bar/°C
Other ranges on request
AccuracyCl. 1.0 (± 1,0% FS)


R22, R134a, R236fa, R290, R404, R407, R410, R422, R427, R449, R502, R507, R717, R744, R1234ze, R1270

Other media on request