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Precont PU4SM

Precont PU4SM

Pressure transmitter for general applications and monitoring of absolute or relative pressure in gases, vapors, liquids and dust - even from harzadous areas

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  • Measuring ranges from 400 mbar up to 1000 bar
  • Wide variety of process connections 
  • Metallic front-flush or internal diaphragm
  • Process temperature range –40°C to +125°C
  • Fully welded robust steel enclosure
  • High protection class IP69K/IP67
  • Highest accuracy to ≤ 0,15%
  • Electronic 4…20mA HART® / RS485 Modbus®-RTU / IO-Link®
  • Certification ATEX / IECEx: Ex ia IIC Ga / Ex ia IIIC Da
Application description

The device is an electronic pressure transmitter / pressure switch for monitoring, control and continuous measurement of pressures.

A high variety of versions of process connections and electronic types allows the use for a wide range of applications, also for demanding measuring requirements.

The front-flush process connection enables the cleanability of the wetted diaphragm to be integrated into the process.

Low-maintenance and trouble-free pressure measurement is thus also guaranteed in critical applications with viscose or also frequently changing media.

Due to its high accuracy and the digital adjustability by HART®, RS485 Modbus®-RTU or  IO-Link® the device can be suited to 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 stress 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- resp. silicone-free version, a factory calibration with calibration certificate and a customer specific configuration resp. preset is also optionally available like factory certifications for drink water suitability.

Customer specific special versions can be realized on request, e.g. special designs for the process connection or other process materials.

Technichal data

Measuring range
Nominal pressure PN: -1…0bar / -1…1bar / 0…0,4bar to 0…1000bar

Output type A – Current 4…20mA HART®
Analogue output: 4…20mA 3,9…20,5mA / ≥ 3,8mA / ≤ 22mA / dI ≤ 1µA
Time behavior: T90 ≤ 8ms / ton ≤ 0,2s
Interface: HART®-compliant (7.0) / 1200 Bit/s

Output type V – RS485 Modbus®-RTU
Interface: RS485, bidirectional / Modbus®-RTU / 9600 Baud (4800…38400 Baud)
Time behavior: T90 ≤ 2ms (td = 0s) / ton ≤ 0,1s (td = 0s)

Output type L – IO-Link®
Interface: IO-Link® V1.1 / Com2 (38400 Baud)
Analogue output: 0…20mA: 0…20,5mA / ≤ 0,05mA / ≤ 22mA / dI ≤ 1µA; 4…20mA: 3,8…20,5mA / ≥ 3,6mA / ≤ 22mA / dI ≤ 1µA
Switch output: 2x PP (Push-Pull), switch to +L/-L
Output: Uout ≤ 0,2V, ≥ Us – 2V / Iout 0…200mA (current limited ≤ 450mA, short circuit protected)
Time behavior: T90 ≤ 2ms / ton ≤ 0,1s

Auxiliary power
Supply voltage Us polarity protected: Type A – 4…20mA HART®: 9…35VDC / Ex: 9…30VDC; Type V – RS485 Modbus®-RTU: 6…35VDC; Type L – IO-Link®: 9…35VDC, without IO-Link® / 18…30VDC, with IO-Link®

Measuring accuracy
Characteristic deviation: ≤ ±0,15%/±0,5%FSO
Long term drift: ≤ ±0,2%FSO/year
Temperature deviation: Tk Zero+Span ≤ ±0,02%FSO/K (-20°C…+85°C); ≤ ±0,03%FSO/K (-40…-20°C / +85…+125°C) Process conditions
Process temperature: Standard: -40°C...+100°C; Extended: -40°C...+125°C
Pressure cycles: ≥ 100 Mio. (1,2xPN)

Environmental conditions
Environmental temperature: -40°C...+100°C
Protection level: IP69K/IP67 (EN/IEC 60529)
MTTF: 463 years