Precont® PU4LM

Delivery Time: not specified

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

  • EHEDG-compliant hygienic process connections
  • Process temperature up to 150 ° C
  • Compact design



The device Precont® PU4LM is an electronic pressure transmitter for monitoring, control as well as continuous measurement of pressures in gases, vapors, liquids and dusts.

Due to the device construction with measuring ranges from -1 bar to 25 bar (gauge), measuring ranges from 0 bar to 25 bar (absolute), measuring spans from 100 mbar to 25 bar, process temperatures from –20°C to +150°C, environmental temperatures from –40°C to +100°C, process material CrNi-steel as well as the availability of a variety of hygienic EHEDG-conformal process connections like thread ISO 228-1 with front-flush O-ring gasket, dairy coupling DIN 11851, Varivent®, DRD the device is especially suitable for the use for food and beverage industry, pharmaceutical industry, biotechnology and sterile process engineering.

The device Precont® PU4LM is suitable for demanding measuring requirements.

Due to its high accuracy and the digital adjustability by HART® (7.0) or RS485 Modbus RTU, the device can be suited a wide variety of applications.

The device with front-flush diaphragm has been specifically designed for the measurement of viscous, paste-like, adhesive, crystallizing, particle-laden and contaminated media, which would clog the pressure channel of conventional process connections.

Through its optimized design, the front-flush process connection enables the cleanability of the wetted diaphragm to be integrated into the process.

The device is particularly suitable for the special conditions of CIP/SIP cleaning processes, such as chemical stability towards cleaning liquids and high temperatures.

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

The front-flush diaphragm is completely welded with the process connection and supplied with a positive seal. A reliable, dead-space free sealing between the process connection and the process adapter resp. measuring medium is thus assured.

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.

Druck_bis_25 Prozesstemperatur_150 Schutzart_IP69K_en Genauigkeit_0_15 Ansprechzeit
Nenndruck PN -1bar bis 0bar bis 0bar bis +25bar
-1bar bis +1bar bis 0bar bis +25bar
0bar bis 0,1bar bis 0bar bis +25bar
Ausgang Typ A – Strom 4 bis 20mA HART®
Analogausgang 4 bis 20mA 3,9mA bis 20,5mA
≥ 3,8mA
≤ 22mA
dI ≤ 1µA
Zeitverhalten T90 ≤ 5ms
ton ≤ 0,2s
Schnittstelle HART®-konform (7.0)
1200 Bit/s
Ausgang Typ V – RS485 Modbus®-RTU
Schnittstelle RS485, bidirektional
9600 Baud (4800 bis 38400 Baud)
Zeitverhalten T90 ≤ 2ms
ton ≤ 0,1s
Ausgang Typ L – IO-Link®
Schnittstelle IO-Link® V1.1
Com2 (38400 Baud)
Analogausgang 0mA bis 20,5mA (bei 0 bis 20mA)
≤ 0,05mA (bei 0 bis 20mA)
≤ 22mA (bei 0 bis 20mA)
dI ≤ 1µA (bei 0 bis 20mA)
3,8mA bis 20,5mA (bei 4 bis 20mA)
≥ 3,6mA (bei 4 bis 20mA)
≤ 22mA (bei 4 bis 20mA)
dI ≤ 1µA (bei 4 bis 20mA)
Schaltausgang 2x PP (Push-Pull)
Schaltend auf +L/-L
Ausgang Uout ≤ 0,2V ≥ Us – 2V
Iout = 0mA bis 200mA
(strombegrenzt ≤ 450mA, kurzschlussfest)
Zeitverhalten T90 ≤ 2ms
ton ≤ 0,1s
Versorgungsspannung Us
9 V bis 35 V DC (bei Elektronik-Ausgang Variante A)
9 V bis 30 V DC (Ex) (bei Elektronik-Ausgang Variante A)
6 V bis 35 V DC (bei Elektronik-Ausgang Variante V)
9 V bis 35 V DC (bei Elektronik-Ausgang Variante L ohne IO-Link®)
18 V bis 30 V DC (bei Elektronik-Ausgang Variante L mit IO-Link®)
Kennlinienabweichung ≤ ±0,15% FSO
≤ ±0,5%FSO
Langzeitdrift ≤ ±0,2% FSO/Jahr
Temperaturabweichung Tk Nullpunkt
≤ 250mbar: ≤ ±0,04% FSO/K (0°C bis +80°C)
≤ 250mbar: ≤ ±0,06% FSO/K (-20°C bis 0°C / +80°C bis +150°C)
≥ 400mbar: ≤ ±0,02% FSO/K (0°C bis +80°C)
≥ 400mbar: ≤ ±0,03% FSO/K (-20°C bis 0°C / +80°C bis +150°C)
Tk Spanne
≤ ±0,02% FSO/K (0°C bis +80°C)
≤ ±0,03% FSO/K (-20°C bis 0°C / +80°C bis +150°C)
Prozesstemperatur -20°C bis +150°C
Druckzyklen ≥ 100Mio. (1,2xPN)
Umgebungstemperatur -40°C bis +100°C
Schutzart IP69K/IP67 (EN/IEC 60529)
MTTF 463 Jahre

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