Beck 901 Series – Pressure Switch


  • With factory-set pressure setting
  • Mounting in any position, to be specified for settings below 100 mba
  • Various mounting brackets and protection caps with IP 44,
    IP 54 and IP 65
  • Life – Mechanically more than 10⁶ cycles

Pressure switch 901 factory-set from -900 mbar to 12 bar.

Beck 901 Series – Pressure Switch monitors overpressure, vacuum, or differential pressure of both liquid and gaseous media, including aggressive types. The pressure setting and switching differential are factory-set by the manufacturer. For temperatures above 85° C, a metal or PPS pressure connection is required. Upon request, pressure connections of other sizes, different plastics, or brass nickel-plated options are available.


  • Wastewater technology
  • liquid level measurement
  • pump control
  • medical technology
  • and many more


Temperature range Ambient temperature from –20°C to 85°C
Temperature of media up to 85°C or 130°C depending on material of pressure connection and diaphragm.
Diaphragm material Depending on media NBR, Silicone, FKM (Viton®), EPDM. For 901.30 Silicone, others upon request.
Pressure connection Material: PA, PVDF, PPS, Brass, Stainless steel
Hose nipple: 5,0mm, 6,5mm, 10,0mm
Thread: M10x1, G1/8, G1/4, G1/2
Electrical rating Specification of the maximum values ​​for ohmic load.
6(1,5) A/250 VAC
2 A/24 VDC
Gilded contact:
100 mA/24 VAC
30 mA/24 VDC
On request AgNi contacts up to 10 A / 250 VAC can also be supplied.
Electrical connection AMP flat plug 6.3 x 0.8 mm according to DIN 46244
Protection class IP44 / IP54 / IP65 depending on the used protection cap
Type Factory-set switching points between Maximum positive working pressure
901.1x 5 mbar and 200 mbar 0,5 / 4 bar
200 mbar and 1.000 mbar 1 / 4 bar
901.41 500 mbar and 3.000 mbar 10 bar*
901.51 1,0 bar and 12 bar 25 bar
901.2x -5 mbar and -200 mbar 0,5 / 4 bar
-200 mbar and -900 mbar 1 / 4 bar
901.3 5 mbar and 50 mbar 100 mbar

*For pressure connections made of plastic, the maximum permissible working pressure is 7 bar!


Beck 901 Pressure switch factory-set from -900 mbar to 12 bar-DpstarGroup