Vacuum Switches

Vacuum switches are electronic or mechanical devices which are used in pneumatic systems to allow pressure or vacuum to flow from one place to another, ensuring that the overall system remains stable. These switches are used in many applications for pressure control and safety interlock functionality, ensuring that optimal conditions are maintained.

Vacuum switches regulate the flow of a vacuum between two spaces, ensuring it's always present where needed. Vacuum switches operate under different pressure types (negative, electro-mechanical, relative, or compound pressure). The required operating conditions for your system will determine the best switch choice.

Vacuum pressure switches are designed for sensing pressure changes in a vacuum. A pre-set point will be determined, and once this is reached or surpassed, the vacuum switch will either open or close the electrical connection.

Types of pressure and vacuum switches

These switches operate under different types of pressure, such as negative pressure, electro-mechanical pressure, relative pressure and compound pressure. This is determined by the conditions in which they operate, and will impact which one you choose. These switches also have different types of connection, different maximum and minimum pressure settings, and varying voltage drops.

Digital hydraulic pressure switches are pressure sensors used as responsive devices to track fluid pressure levels. They close off electrical contacts when the determined fluid pressures are attained. They are designed to either make contact upon pressure increases, or on pressure decreases.

What are digital hydraulic pressure switches used for?

Digital Hydraulic Pressure Switches are used as automatic supervisory products in systems containing pressurised fluids. The manufacturing industry make use of them as feedback devices to highlight spikes and drops in fluid pressures. They are typical in mobile industrial equipment with modern displays, where the oil pressure will be shown as numeric and alarms activated if the engine pressure levels drop beyond certain points.

Applications:

Vacuum switches can be used in various industrial environments. They are considered to be an essential device for monitoring and control tasks in hydraulic and processing industries. These type of switches can sense a change in the vacuum and will open or close an electrical circuit when the set point is reached.


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Description Price Minimum Operating Pressure Maximum Operating Pressure Pressure Type Suitable Media Connection Type Voltage Rating Connection Thread Size Manufacturer Series Contact Operation Connection Thread Standard Minimum Operating Temperature Maximum Operating Temperature IP Rating
RS Stock No. 100-0674
Mfr. Part No.PAC50-BCD
BrandSick
HK$1,543.26
Each
units
-1bar 1 bar Negative Pressure, Positive Pressure Air G 1/4 Female, M12 4-Pin, 4 mm Pneumatic Hose - 17 → 30V dc M12, 1/4 in PAC50 Normally Closed, Normally Open G, Metric 0°C +60°C IP65, IP67
RS Stock No. 297-0052
BrandRS PRO
HK$372.93
Each
units
1bar 12 bar Positive Pressure - G 1/4 Adjustable 250V ac 1/4 in F4 Normally Closed, Normally Open G -25°C +85°C IP65
RS Stock No. 296-9989
BrandRS PRO
HK$1,504.04
Each
units
2bar 40 bar Positive Pressure Oil G 1/4 Adjustable 250V ac/dc 1/4 in K5 Normally Closed, Normally Open G -20°C +80°C IP65
RS Stock No. 297-0080
BrandRS PRO
HK$459.48
Each
units
20bar 200 bar Positive Pressure - G 1/4 Adjustable 250V ac 1/4 in F4 Normally Closed, Normally Open G -25°C +85°C IP65
RS Stock No. 723-012
Mfr. Part No.81513552
BrandCrouzet
HK$677.18
Each
units
2bar 8 bar Positive Pressure Air, Gas, Liquid Push In Adjustable 220 → 230V 4 mm 81 Normally Closed, Normally Open - -10°C +70°C IP20
RS Stock No. 302-5759
Mfr. Part No.IS 3000-F02
BrandSMC
HK$908.63
Each
units
- 8 bar Positive Pressure Air, Gas Rc 1/4 - 30V dc, 125 V ac, 125 V dc, 250 V ac 1/4 in IS3000 Normally Closed, Normally Open Rc -5°C +60°C -
RS Stock No. 847-7048
Mfr. Part No.ZS-38-A1
BrandSMC
HK$51.08
Each
units
- - - - - - - - ZS - - - - -
RS Stock No. 363-5968
BrandRS PRO
HK$659.75
Each
units
1bar 10 bar Positive Pressure - G 1/4 Adjustable 250V ac/dc 1/4 in K3 Normally Closed, Normally Open G -20°C +80°C IP65
RS Stock No. 407-6089
Mfr. Part No.0882300
HK$1,298.89
Each
units
25bar 250 bar Positive Pressure Fluid, Oil G 1/4 - - 1/4 in 18D Normally Closed, Normally Open G -20°C +80°C IP65
RS Stock No. 725-305
Mfr. Part No.ZSM1-021L(P31806-01)
BrandSMC
HK$869.72
Each
units
-80kPa -27 kPa Vacuum Air, Gas R 1/8 Reed 100V ac/dc 1/8 in ZSM1 - R -5°C +60°C -
RS Stock No. 880-2299
BrandRS PRO
HK$1,102.95
Each
units
0.2bar 2.5 bar - Fluid 1/4 in BSP Male Adjustable 250V ac 1/4 in F4 Normally Closed, Normally Open G -25°C +85°C IP65
RS Stock No. 535-2299
Mfr. Part No.0862442000000000RS
BrandNorgren
HK$5,650.84
Each
units
0bar 10 bar Positive Pressure Air, Gas G 1/8 - 10.8 → 30V dc 1/8 in 40D - G 0°C +50°C IP65
RS Stock No. 822-3951
Mfr. Part No.0880400000000000
HK$1,198.42
Each
units
1bar 16 bar Vacuum Gaseous, Hydraulic, Liquid Fluid, Neutral, Non-Combustible Water Application, Pneumatic, Vacuum G 1/4 Electromechanical Relay - 1/4 in 18D Normally Closed, Normally Open G -10°C +85°C IP65
RS Stock No. 511-6655
Mfr. Part No.SCPSD-060-04-16
BrandParker
HK$3,849.61
Each
units
0bar 60 bar Positive Pressure - G 1/4 - 1.5V dc 1/4 in SCPSD - G -20°C +85°C IP65, IP67
RS Stock No. 777-069
Mfr. Part No.04015600
BrandNorgren
HK$1,370.34
Each
units
0bar 10 bar Positive Pressure Air, Gas G 1/8 - 24 V dc, 240V ac 1/8 in 040 Normally Closed, Normally Open G -20°C +80°C IP65
RS Stock No. 843-0367
Mfr. Part No.IS3000-N02
BrandSMC
HK$899.38
Each
units
- 0.8 (Operating) MPa, 1 (Proof) MPa - Air, Inlet Gas NPT 1/4 Reed 125 V dc, 250V ac 1/4 IS3000 Normally Closed, Normally Open NPT -5°C +60°C IP40
RS Stock No. 389-6006
Mfr. Part No.PS1-P1091
BrandParker
HK$763.13
Each
units
2bar 5 bar Positive Pressure - - - 250V - PS1 Normally Closed, Normally Open - -15°C +60°C -
RS Stock No. 246-2416
Mfr. Part No.IS3000-02
BrandSMC
HK$900.01
Each
units
- 0.8 MPa Positive Pressure Air, Gas Rc 1/4 - 30V dc, 125 V ac, 125 V dc, 250 V ac 1/4 in IS3000 Normally Closed, Normally Open Rc -5°C +60°C -
RS Stock No. 701-3551
Mfr. Part No.ZSE80F-F02-B
BrandSMC
HK$2,732.98
Each
units
-100kPa 100 kPa Compound Pressure Fluid G 1/4 Reed 12 → 24V dc 1/4 in ZSE80 - G 0°C +50°C IP65
RS Stock No. 366-3979
Mfr. Part No.0880200
BrandNorgren
HK$1,221.32
Each
units
0.2bar 2 bar Positive Pressure Gas, Liquid G 1/4 - - 1/4 in 18D Normally Closed, Normally Open G 0°C +80°C IP65