vacuum switches

Vacuum switches operate an electrical contact when a certain fluid pressure has been reached. When the pressure reaches the set-point or reset-point the pressure switch opens or closes the contacts to prevent under- or overpressure of a... Read more Read more

Product Brand Connection size Material Seal material Contacts Max pressure (bar) Electrical connection Max switch capacity Switch hysteresis Connection type Max. overpressure (bar) Pressure sensor feature Max temperature (°C) Min temperature (°C) Min pressure (bar) Suitable for oil Thread size Measuring element Degree of protection (IP) Suitable for gases
-0.98 to -0.2bar SPDT Brass...
+2 days
Tameson 1/8 inch Brass NBR (nitrile rubber) Changeover contact -0.2 Flat plug-in connection 5 A / 30 V DC, 5 A / 42 V AC 15 - 25 percent Outer thread cylindrical... 2 For vacuum 85 -25 -0.98 Yes 1/8 inch Membrane IP65 No
-0.95 to -0.2bar NO Brass...
+2 days
SUCO 1/8 inch Brass FKM (FPM) Normally open -0.2 Screw terminal 100 VA / 42 V AC/DC 5 - 15 percent Inner thread cylindrical... 20 For vacuum 120 -5 -0.95 Yes 1/8 inch Membrane IP65 No
-0.98 to -0.2bar SPDT...
+2 days
Tameson 1/4 inch Aluminium NBR (nitrile rubber) Changeover contact -0.2 DIN-A 5 A / 30 V DC, 5 A / 250 V AC 15 - 25 percent Inner thread cylindrical... 2 Can be turned 360 deg, For... 85 -25 -0.98 Yes 1/4 inch Membrane IP65 No
-0.85 to -0.15bar SPDT Zinc...
+2 days
Barcontrol 1/4 inch Zinc die-cast NBR (nitrile rubber) Changeover contact -0.15 DIN-A 3 A / 24 V DC, 6 A / 250 V AC 100 - 250 mbar Inner thread cylindrical... 20 For vacuum, With adjustment... 80 -20 -0.85 Yes 1/4 inch Membrane IP65 No
-0.85 to -0.15bar SPDT Zinc...
+2 days
Barcontrol - Zinc die-cast NBR (nitrile rubber) Changeover contact -0.15 DIN-A 3 A / 24 V DC, 6 A / 250 V AC 100 - 250 mbar Flange 5.3x20 20 For vacuum, With adjustment... 80 -20 -0.85 Yes - Membrane IP65 No
-0.85 to -0.15bar SPDT Zinc...
+2 days
Barcontrol - Zinc die-cast NBR (nitrile rubber) Changeover contact -0.15 Plug-in connection M12 3 A / 24 V DC, 6 A / 250 V AC 100 - 250 mbar Flange 5.3x20 20 For vacuum, With adjustment... 80 -20 -0.85 Yes - Membrane IP67 No
-0.95 to -0.1bar SPDT...
+2 days
SUCO 1/8 inch Aluminium ECO Changeover contact -0.1 DIN-A 3.5 A / 30 V DC, 3.5 A /... 10 - 30 percent Inner thread cylindrical... 20 For vacuum 100 -20 -0.95 Yes 1/8 inch Membrane IP65 No
-0.95 to -0.2bar NC Brass...
+2 days
SUCO 1/8 inch Brass FKM (FPM) Normally closed -0.2 Screw terminal 100 VA / 42 V AC/DC 5 - 15 percent Inner thread cylindrical... 20 For vacuum 120 -5 -0.95 Yes 1/8 inch Membrane IP65 No
vacuum switches

vacuum switches

Vacuum switches operate an electrical contact when a certain fluid pressure has been reached. When the pressure reaches the set-point or reset-point the pressure switch opens or closes the contacts to prevent under- or overpressure of a system.

Tameson provides two main types of vacuum switches: electromechanical and mechanical (solid state). The mechanical vacuum switches are available with three different types of contacts: normally open (NO), normally closed (NC) and changeover (Single Pole, Double Throw or SPDT). The electronic vacuum switches have a digital display to set up the switching function. In a pressure switch, a diaphragm or a piston opens or closes a circuit when the pressure reaches the set-point or drops to a reset-point. In the mechanical vacuum switch, the setting pressure is typically adjusted with a hex key or turning knob. In the electrical vacuum switch the set-point and reset-point can be adjusted with a digital display. The difference between the switch point and the reset point is hysteresis. Hysteresis for mechanical vacuum switches is usually determined by the manufacturer, the hysteresis for electronic pressure vacuum is usually configurable.

Our vacuum switches are available with different types of housing material and seal. The media and temperature range are important to choose the material. Check our chemical resistance table to choose the correct material.

Other important factors to select a vacuum switch are: maximum overpressure, degree of ingress protection, ATEX approvals, reproducibility, resistance to vibration and shock, process connections, switch capacity and the type of electrical connection.