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Precont PU4SC

Precont PU4SC

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 50 mbar up to 20 bar
  • Wide variety of process connections 
  • Robust ceramic front-flush or internal diaphragm
  • Precise dry capacitive sensor
  • Process temperature range –40°C to +125°C
  • Fully welded robust steel enclosure
  • High protection class IP69K/IP67
  • Highest accuracy to ≤ 0,05%
  • 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, also by CIP/SIP cleaning processes.

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 a material test certificate EN10204 3.1 or a factory certifications for drink water suitability.

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

Technichal data

Measuring range
Nominal pressure PN: -0,1…0bar / -0,1…0,1bar / -1…0bar / -1…1bar / 0…0,05bar to 0…20bar

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: ≤ ±0,05%/±0,1%/±0,2%FSO
Long term drift: ≤ ±0,15%FSO/year
Temperature deviation:  Tk Zero ≤ ±0,015%FSO/K, ≤ ±0,75%FSO (-20°C…+80°C);  Tk Span ≤ ±0,015%FSO/K; ≤ ±0,5%FSO (-20°C…+80°C/≥0,4bar) / ≤ ±0,8%FSO (-20°C…+80°C/<0,4bar)

Process conditions
Process temperature: Standard: -40°C...+100°C; Extended: -40°C...+125°C (+140°C – 1h)
Pressure cycles: ≥ 100 Mio. (1,2xPN)

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