Brand: WIKA

WIKA PSM01 Compact Pressure Switch

Name: WIKA PSM01 Compact Pressure Switch – Datasheet & Price Quote
Brand: WIKA

Description

Overview

WIKA PSM01 is a compact mechanical pressure switch engineered as a screw-in switch for hydraulics, pneumatics, mobile working machines, and general machine building applications. Available in diaphragm or piston design, the WIKA PSM01 opens or closes an electrical circuit as pressure rises or falls past a defined threshold, and requires no supply voltage to switch – a defining advantage of mechanical pressure switches over their electronic counterparts.

Backed by manufacturer datasheet documentation, Seven Star LLC proudly supplies the WIKA PSM01 pressure switch to industrial, OEM, and machine building customers across Oman and the wider GCC. Every unit supplied through Seven Star LLC comes with manufacturer documentation and access to local technical support – supporting facility engineers and procurement teams in Muscat, Sohar, and Salalah who specify the WIKA PSM01.

Working Principle

The WIKA PSM01 uses a diaphragm or piston measuring element that responds directly to process pressure, mechanically actuating a switch contact once the pressure crosses the field- or factory-set threshold. A preloaded spring establishes the switch point, and a Belleville spring provides simultaneous triggering of the switch contact; the resulting snap-action behavior increases both switching stability and vibration resistance compared with a gradual, non-snap mechanical response. Because the switching action is entirely mechanical, no supply voltage is required for the switch itself to operate – it simply opens or closes a circuit as an electromechanical relay would, powered only by the process pressure it is monitoring.

This mechanical architecture gives the WIKA PSM01 its defining reliability advantage in applications where electrical power to the switch point itself is undesirable or impractical: the diaphragm design covers setting ranges up to 60 bar overload safety, while the piston design extends coverage up to 350 bar, with the setting range always kept below the overload safety limit so that pressure spikes can be safely absorbed without damaging the switch mechanism. An adjustment screw allows convenient on-site setting of the required switch point, and WIKA can optionally supply the switch pre-set to the customer’s required trip point from the factory.

Engineering Design of the WIKA PSM01

The WIKA PSM01 is available with setting ranges from 0.2 to 2 bar (3 to 30 psi) up to 30 to 320 bar (450 to 4,600 psi), plus a vacuum range of -0.85 to -0.15 bar (-25 inHg to -5 inHg), covering pressure, vacuum, and compound applications from a single compact switch platform. Non-repeatability of the switch point is ≤2% of span, and switching functions are configurable as normally closed, normally open, or change-over (SPDT) contact, giving control system designers flexibility in how the switch signal is wired into a safety or control circuit.

The switch enclosure is constructed from robust stainless steel 316 with IP66 / NEMA 4X ingress protection, standing 50 mm tall in the blade-terminal version with spanner widths of 24 and 27 mm for straightforward socket-wrench installation. The compact, slim form factor makes the PSM01 well suited to both OEM integration into compact machine assemblies and low-volume replacement or retrofit orders, and the switch is rated for compressed air, neutral and self-lubricating fluids, and neutral gases.

Key Features

The WIKA PSM01 combines mechanical simplicity with rugged, repeatable switching performance that makes it a standard choice for OEM and industrial pressure switching applications.

No supply voltage is required for the switching process, since the mechanism is entirely mechanical.
Setting ranges span 0.2 to 2 bar up to 30 to 320 bar, plus a vacuum range down to -0.85 bar, from a single switch platform.
Non-repeatability of the switch point is ≤2% of span for dependable, consistent triggering.
Normally closed, normally open, or change-over (SPDT) switching functions support diverse control circuit designs.
A stainless steel 316 enclosure with IP66 / NEMA 4X protection resists corrosion and moisture ingress in industrial environments.
A compact, slim design with standard spanner widths simplifies socket-wrench installation.
Belleville-spring snap-action switching improves stability and vibration resistance versus gradual mechanical actuation.
Optional factory pre-setting of the switch point removes on-site adjustment steps for OEM production runs.

Industrial Applications

The WIKA PSM01 is deployed across hydraulics, pneumatics, mobile working machines, and general machine building and plant construction wherever a simple, voltage-free pressure switch is required for compressed air, neutral fluids, or neutral gases. Typical duties include pump and compressor control, pipeline and filter monitoring, hydraulic and pneumatic system pressure switching, and plastics injection moulding machine control circuits.

Working closely with plant engineers in the region, Seven Star LLC distributes the WIKA PSM01 to OEM machine builders, industrial facilities, and mobile equipment manufacturers throughout Oman and the GCC. The pressure switch is a strong fit for hydraulic and pneumatic system integration across the Sohar and Salalah industrial zones, as well as for general machine building and industrial plant construction across Muscat that require dependable, cost-effective mechanical pressure switching.

Technical Specifications

The table below summarizes the core specifications of the WIKA PSM01 compact pressure switch as supplied by Seven Star LLC.

Parameter	Specification
Model	WIKA PSM01
Type	Mechanical, screw-in compact pressure switch
Measuring Element	Diaphragm or piston
Setting Ranges	0.2 – 2 bar up to 30 – 320 bar (3 – 30 psi up to 450 – 4,600 psi)
Vacuum Range	-0.85 to -0.15 bar (-25 inHg to -5 inHg)
Non-Repeatability	≤2% of span
Switching Function	Normally closed, normally open, or change-over (SPDT)
Enclosure	Stainless steel 316, IP66 / NEMA 4X
Mounting	Socket-wrench installation, spanner widths 24/27 mm
Compatible Media	Compressed air, neutral/self-lubricating fluids, neutral gases
Typical Applications	Hydraulics, pneumatics, mobile machines, machine building

Request a Quote for WIKA PSM01 Compact Pressure Switch

Seven Star LLC supports the full procurement cycle for the WIKA PSM01 compact pressure switch, from formal RFQ submission to confirmation of availability and lead time, technical datasheet delivery, and direct consultation with our instrumentation division on setting range, switching function, and factory pre-set configuration for your application. With fast quotation turnaround, we supply every WIKA PSM01 pressure switch with manufacturer documentation and dependable local technical support. Contact Seven Star LLC today to request a quotation or discuss your pressure switching requirements.

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About brand

WIKA is the German manufacturer of pressure, temperature, level and flow instruments, best known for its pressure gauges. Alexander Wiegand and Philipp Kachel founded it on 2 January 1946 in Klingenberg am Main, Bavaria. The name comes from the first two letters of their surnames. WIKA is still run by the Wiegand family and is headquartered in Klingenberg.

Seven Star LLC is an independent supplier in Muscat. We list WIKA pressure gauges, diaphragm seals, transmitters, switches, thermometers and thermowells, and supply them to plants, contractors and panel builders in Oman and the GCC by model and order code.

WIKA company profile

Established	2 January 1946, Klingenberg am Main, Germany, by Alexander Wiegand and Philipp Kachel
First products	Mechanical pressure and temperature gauges
Ownership	Family-owned; managed by Alexander Wiegand, grandson of the founder, since 1996
Product families	Pressure gauges, diaphragm seals, pressure transmitters and switches, thermometers, RTDs, thermocouples, thermowells, calibration equipment, level and flow instruments

Milestones

1946: Alexander Wiegand and Philipp Kachel found the company in Klingenberg am Main on 2 January; pressure gauge production starts at the end of the year. The name WIKA comes from the first letters of their surnames.
1951: Konrad Wiegand, the founder's son, takes over management.
1967: Ursula Wiegand leads the company after her husband's death.
1986: The company is reunited with the Kachel thermometer factory, which Philipp Kachel had set up after leaving in 1956.
1994: Certification to DIN ISO 9001.
1996: Alexander Wiegand, the founder's grandson, becomes head of the company.

WIKA products we list

Family	Models	Typical use
Bourdon tube pressure gauges	111.10, 111.12, 212.20, 213.53, 232.50, 233.50, 232.30/233.30 safety pattern	HVAC and utilities (111 series) to process plants (23x series in stainless steel)
Diaphragm and differential pressure gauges	432.50, 732.51, 700.01, DPGT43	Low pressures, viscous or dirty media, and filter differential pressure
Diaphragm seals	990.10, 990.27	Separating the gauge from corrosive, hot or clogging media
Transmitters, switches and test gauges	A-10, UPT-20, PSM01, CPG1500	4-20 mA pressure signals, switching, and precision calibration checks
Thermometers	TG54, Model 55, A52, 73 gas-actuated	Local temperature indication on pipes, vessels and HVAC
Temperature sensors and thermowells	TR10, TR12-B, TR33, TC10-B, TW10 flanged, TW15 threaded	RTD and thermocouple measurement in process lines

The WIKA model number tells you the build. In 232.50, the first digit 2 means stainless steel wetted parts, the second digit 3 means a liquid-fillable case, and ".50" is the case style. The 111 series uses copper alloy wetted parts and suits water and air. Where the medium is corrosive, very hot or would block the gauge, a diaphragm seal such as the 990.27 keeps it away from the Bourdon tube. For temperature, a thermowell like the TW10 lets you remove the sensor without opening the process.

Where WIKA instruments are used

In Oman and the GCC, WIKA gauges, transmitters and thermometers are used in oil and gas, refining and petrochemical plants, power and desalination, water networks, district cooling and HVAC, and on skids and machines from OEMs.

Ordering WIKA instruments: what we need

Send the model, dial size (for example 63, 100 or 160 mm), range and unit, connection size and position (lower or back mount), accuracy class and whether liquid filling is needed. For diaphragm seals and thermowells, add the process connection, materials and insertion length.

Facts checked against WIKA company history, October 2026.

Browse WIKA products by category: Pressure Instrumentation, Temperature Instrumentation.

Frequently Asked Questions

Does the WIKA PSM01 need electrical power to switch?

No. The PSM01 is a purely mechanical pressure switch, so no supply voltage is required for the switching process itself. It opens or closes a circuit mechanically as process pressure crosses the set threshold.

What setting ranges are available for the WIKA PSM01?

The PSM01 covers setting ranges from 0.2 to 2 bar (3 to 30 psi) up to 30 to 320 bar (450 to 4,600 psi), plus a vacuum range of -0.85 to -0.15 bar (-25 inHg to -5 inHg).

Can the switch point of the WIKA PSM01 be set at the factory?

Yes. WIKA can optionally supply the PSM01 pre-set to the customer's required trip point at the factory, removing the need for on-site adjustment, in addition to the standard field-adjustable version.

What switching functions are available on the PSM01?

The PSM01 is available with normally closed, normally open, or change-over (SPDT) switching functions, giving flexibility in how the switch is wired into a control or safety circuit.

Is Seven Star LLC an experienced supply partner for WIKA products?

Yes, Seven Star LLC is an experienced supplier of WIKA in Oman and the GCC. We supply genuine WIKA instrumentation with manufacturer documentation and local technical support.

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