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Precont PS4SK

Precont PS4SK

Digital pressure switch with ceramic membrane

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  • Hygienic and aseptic applications in: Food and beverage industry, Pharmaceutical industry, Biotechnology, Sterile process engineering
  • Wide range of applications
  • Finely graded measuring ranges from 250 mbar up to 600 bar
  • Wide process temperature range –40°C to +135°C
  • Wide variety of process connections 
  • High protection class IP65 / IP67
  • Wide environmental temperature range –40°C to +85°C
  • Ceramic front-flush or internal diaphragm 
  • High accuracy – characteristic deviation ≤ 0,5% of measuring range
  • Integrated evaluation electronic: Digital display, function LED’s, keyboard / 2x PNP switch output / 1x current output 4…20mA / Connector plug M12
  • High operating comfort: enclosure and display rotatable for optimal operability in each installation position
  • Robust high brightness LED display for best readability
  • 3-key operation without additional assistance with tactile feedback
Application description

Due to the device construction with measuring ranges from -1 bar to 600 bar, gauge, measuring ranges from 1 bar to 40 bar, absolute, measuring spans from 250 mbar to 600 bar, process temperatures from –40°C to +135°C and process materials Al2O3-ceramic / CrNi-steel as well as the availability of industrial standard process connections like thread connection ISO 228-1, EN 837 manometer, thread connection ISO 228-1 (inner thread), thread connection ISO 228-1 (EN 1179-2 E), thread connection ISO 228-1 (inner bore) and thread connection ISO 228-1 (front-flush) the device is especially suitable for the use for machinery and plant engineering, air-conditioning and refrigeration plant engineering, hydraulic and pneumatic systems, process industry, environmental technology and facility and building automation.

The device is suitable for demanding measuring requirements. 

Due to its high accuracy and the high flexibility of configuration, the device can be suited a wide variety of applications.

The robust design and the high-quality workmanship turns the device into a very high quality product, which even the most adverse environmental conditions cannot affect, whether the lowest temperatures when used outdoors, extreme shock and vibration or aggressive media.

A captive laser marking of the type label ensures the identifiability throughout the entire lifetime of the device.

Obviously is the optional marking of a measurement point designation resp. TAG, a customer label or of a neutral type label, of course also per laser marking.




A LABS-free resp. silicone-free version, a factory calibration with calibration certificate and a customer specific configuration resp. preset is also optionally available like a material test certificate EN10204 3.1 or factory certifications for drink water resp. food suitability.

Technische Daten

Supply voltage: 10,5…35VDC, reverse polarity protected

Supply current: ≤ 60mA Analogue output max. 22,5mA Switch output with no load


Switch output S1 / S2

Function: PNP switch to +L

Output current: 0… ≤ 200mA current limited, short circuit protected


Analogue output 4...20mA

Operating range: 3,9…21mA, min. 3,8mA, max. 22mA

Permitted load: ≤ (US - 10,5V) / 22mA

Start-up time: ≤ 1 s


Measurement accuracy

Characteristic deviation: ≤ ± 0,5% FS 

Long term drift: ≤ ± 0,2% FS / year not cumulative

Temperature deviation Measuring range 0…250 mbar to 0…2,5 bar: ≤ ±0,05% FS / K / Measuring range 0…4 bar to 0…600 bar: ≤ ±0,04% FS /K



Diaphragm: (process wetted) Ceramic aluminum oxide Al2O3 – 96%

Process connection: (process wetted) Steel 1.4404/316L / Steel 1.4571/316Ti

Terminal enclosure: CrNi-steel

Gaskets: (process wetted) FPM – fluorelastomere (Viton®) / EPDM – ethylene-propylene-dienmonomere, FDA-listed


Environmental conditions

Environmental temperature: – 40°C...+85°C 

Process temperature: – 40...+100°C (extended -40...+135°C)

Process pressure: 0 bar ...600 bar (depending on process connection)

Protection: IP65/IP67 EN/IEC 60529