Pressure Switches

Pressure switches work by forming an electrical contact when its input is subjected to a certain amount of fluid or air pressure.

How They Work
Pressure switches can activate with either rising or falling fluid pressure, so are essential components in any pressurized fluid system where automatic supervision is required.

Uses for pressure switches
Pressure switches are used in a variety of systems. For example, a pneumatic pressure switch would be used to automatically switch off an electric air compressor when the desired pressure had been achieved in, for instance, a car tire. Hydraulic pressure switches have a number of applications in the automotive industry, such as measuring oil levels.

Media
The RS Range of Pressure Switches can accommodate the measuring of a variety of media, such as air and gas for pneumatic applications, and everything from oil to sea water in fluid applications.

Pressure Switch Types
There are four key variations of pressure switch available in the RS range.
• Relative or Gauge Pressure Switches are calibrated for a variety of different purposes, and measure pressure relative to a given value.
• Differential Pressure Switches are commonly used for sensing a difference in pressure between two points in a system
• Vacuum Pressure Switches provide electrical feedback to measure a rise or fall of pressure in a system.

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Description Price Pressure Range Pressure Reading Type Media Measured Output Type Supply Voltage Minimum Pressure Reading Maximum Pressure Reading Process Connection Analogue Output Electrical Connection Minimum Operating Temperature Maximum Operating Temperature Accuracy Response Time
RS Stock No. 748-4717
Mfr. Part No.ISE40A-01-R
BrandSMC
SGD190.02
Each
units
-0.1 → 1MPa Vacuum Gas Analogue 12 → 24 V dc -0.1MPa 1MPa BSP 1/8 1 → 5 V, 4 → 20 mA Wire Lead -5°C +50°C ±0.2 % 2.5 ms
RS Stock No. 779-4279
Mfr. Part No.217464-RS
SGD128.69
Each
units
10 → 30psi - Air, Hydraulic SPDT 125/250 V 10psi 300psi BSP 1/4 - Screw Terminals -9°C +85°C - -
RS Stock No. 124-2173
Mfr. Part No.XMPA12C2131C
SGD52.73
Each
units
0.3 → 10.3 (Falling) bar, 1.3 → 12 (Rising) bar Differential Air, Fresh Water, Sea Water 3NC - 0.3 (Falling) bar, 1.3 (Rising) bar 10.3 (Falling) bar, 12 (Rising) bar G1/4 - Screw Clamp -25°C +70°C <3.5 (Repeat) % -
RS Stock No. 124-2124
Mfr. Part No.9013FHG2J27
BrandSquare D
SGD50.95
Each
units
40 → 100 (Rising)psi Differential Air 2NC - 40 (Rising)psi 100 (Rising)psi 0.25 in NPSF - Screw Clamp -33°F +257°F ±3 (Repeat) % -
RS Stock No. 123-6134
Mfr. Part No.251233
SGD39.54
Each
units
35 → 85bar - Liquid SPST-NC - 35bar 85bar BSP 1/4 - 1/4 x 1/32 Spade Terminal -40°C +121°C ±2.1 bar -
RS Stock No. 124-2120
Mfr. Part No.9012GAW5
SGD444.67
Each
units
3 → 150 (Decreasing) psi, 6 → 30 (Differential) psi Differential Air, Hydraulic Oil, Non-Corrosive Gas, Non-Corrosive Liquids SPDT-NO/NC 240 V ac, 250 V dc 3 (Decreasing) psi, 6 (Differential) psi 30 (Differential) psi, 150 (Decreasing) psi 0.25 in NPTF - 0.5 in NPT -10°F +85°F <4 (Repeat) % -
RS Stock No. 779-4210
Mfr. Part No.PS61-50-4MGZ-A-SP
SGD50.41
Each
units
275 → 800psi - Hydraulic SPST-NO 42 V dc 275psi 800psi BSP 1/4 - Spade Terminal -9°C +110°C - -
RS Stock No. 518-4490
BrandRS PRO
SGD163.72
Each
units
0 → 2.5bar Gauge Gas, Liquid Analogue 10 → 30 V dc 0bar 2.5bar G1/4 4 → 20 mA M12 Connector -20°C +125°C ≤0.5 % ≤3 ms
RS Stock No. 748-4720
Mfr. Part No.ZSE40AF-01-T
BrandSMC
SGD252.34
Each
units
-100 → 100kPa Vacuum Gas Analogue 12 → 24 V dc -100kPa 100kPa BSP 1/8 1 → 5 V, 4 → 20 mA Wire Lead -5°C +50°C ±0.2 % 2.5 ms
RS Stock No. 779-4288
Mfr. Part No.PS71-50-4MGS-C-HC
SGD128.69
Each
units
1000 → 3000psi - Air, Hydraulic SPDT 125/250 V 1000psi 3000psi BSP 1/4 - Screw Terminals -9°C +85°C - -
RS Stock No. 779-4226
Mfr. Part No.PS61-10-4MGZ-B-SP
SGD39.54
Each
units
15 → 60psi - Hydraulic SPST-NC 42 V dc 15psi 60psi BSP 1/4 - Spade Terminal -9°C +110°C - -
RS Stock No. 124-2134
Mfr. Part No.XMLP006GD11F
SGD155.98
Each
units
0 → 6bar - Air, Fresh Water, Gas, Hydraulic Oil Analogue 5 V dc 0bar 6bar G1/4 0.5 → 4.5 V M12 4-Pin Connector -30°C +85°C ±0.1 (Repeat) %, ±0.5 (Measurement) % ≤2 ms
RS Stock No. 124-2170
Mfr. Part No.XMPA12B2131C
SGD50.34
Each
units
0.3 → 10.3 (Falling) bar, 1.3 → 12 (Rising) bar Differential Air, Fresh Water, Sea Water 2NC - 0.3 (Falling) bar, 1.3 (Rising) bar 10.3 (Falling) bar, 12 (Rising) bar G1/4 - Screw Clamp -25°C +70°C <3.5 (Repeat) % -
RS Stock No. 124-2156
Mfr. Part No.XMLR100M1P25
SGD596.34
Each
units
5 → 97 (Falling) bar, 8 → 100 (Rising) bar Differential Air, Fresh Water, Hydraulic Oil, Refrigerator Fluid Analogue, PNP-NO/NC 24 V dc 5 (Falling) bar, 8 (Rising) bar 97 (Falling) bar, 100 (Rising) bar G1/4 4 → 20 mA M12 4-Pin Connector -20°C +80°C ≤0.2 (Repeat) %, ≤0.6 (Output) %, ≤1 (Overall) % ≤10 (Analogue) ms, ≤5 (Discrete) ms
RS Stock No. 835-2839
Mfr. Part No.XMLR010G1N25
SGD493.48
Each
units
0 → 10bar Differential Air, Fresh Water, Hydraulic Oil, Refrigerator Fluid Analogue, 1 x NPN 24 V dc 0bar 10bar G1/4 4 → 20 mA M12 Connector -20°C +80°C ≤0.1 % ≤10 (Analogue) ms, ≤5 (Discrete) ms
RS Stock No. 123-6133
Mfr. Part No.251232
SGD50.08
Each
units
35 → 85bar - Liquid SPST-NO - 35bar 85bar BSP 1/4 - 1/4 x 1/32 Spade Terminal -40°C +121°C ±2.1 bar -
RS Stock No. 835-2860
Mfr. Part No.XMLR250M1P25
SGD506.77
Each
units
0 → 250bar Differential Air, Fresh Water, Hydraulic Oil, Refrigerator Fluid Analogue, 1 x PNP 24 V dc 0bar 250bar G1/4 4 → 20 mA M12 Connector -20°C +80°C ≤0.1 % ≤10 (Analogue) ms, ≤5 (Discrete) ms
RS Stock No. 835-2867
Mfr. Part No.XMLR250M2P05
SGD406.12
Each
units
0 → 250bar Differential Air, Fresh Water, Hydraulic Oil, Refrigerator Fluid 2x PNP-NO/NC 24 V dc 0bar 250bar G1/4 - M12 Connector -20°C +80°C ≤0.1 % ≤5 ms
RS Stock No. 124-2133
Mfr. Part No.XMLP001GL71F
SGD189.06
Each
units
0 → 1bar - Air, Fresh Water, Gas, Hydraulic Oil Analogue 24 V dc 0bar 1bar G1/4 0 → 10 V Cable -30°C +85°C ±0.1 (Repeat) %, ±0.5 (Measurement) % ≤2 ms
RS Stock No. 820-7026
Mfr. Part No.6742-0051
BrandHerga
SGD83.84
Each
units
45 → 75psi - Air, Gas, Liquid, Oil SPCO 220 V dc, 250 V ac 45psi 75psi BSP 1/8 - Spade Terminal -5°C +70°C ±10 % -
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