Pressure transmitter for hygienic process applications

Precont PN4LM

Pressure transmitter for hygienic process applications, measuring 0…100 mbar to 0…25 bar with EHEDG-compliant flush diaphragm, 0/4…20 mA or 0…10 V output, up to 4 PNP switch outputs and data logger.

Introduction

Hygienic and aseptic processes place high demands on every pressure measurement point. This pressure transmitter and pressure switch is designed for applications in the food and beverage industry, pharmaceutical production, biotechnology and sterile process technology, where cleanability and stable readings are both essential.
 
The flush metallic diaphragm supports pressure measurement in viscous, pasty, adhesive, crystallizing, particle-laden and contaminated media. Its optimized process connection allows process-integrated cleaning of the wetted measuring diaphragm, while the device is well suited for CIP/SIP cleaning conditions with cleaning solutions and elevated temperatures up to +150 °C.
 
Daily operation is clear and flexible. The graphic color display, keypad, rotatable housing and rotatable display simplify handling in different mounting positions. With 0/4…20 mA or 0…10 V output, up to 4 PNP switch outputs and memory for over 500,000 measured values, the device combines process signaling, switching and local measurement history.

Hygienic fit
Hygienic fit
EHEDG-compliant flush metallic diaphragm supports hygienic and aseptic applications.
CIP/SIP capable
CIP/SIP capable
Designed for cleaning solutions and elevated process temperatures up to +150 °C.
Difficult media
Difficult media
Measures viscous, pasty, adhesive, crystallizing or particle-containing media.
Reliable accuracy
Reliable accuracy
Xcellence version offers accuracy down to ≤ ±0.15% of the measuring range.
Flexible signals
Flexible signals
Provides 0/4…20 mA or 0…10 V output and up to 4 PNP switch outputs.
Stored readings
Stored readings
Memory for over 500,000 measured values supports on-site data history.

Features

Measuring principle

The device uses a DMS piezoresistive sensor with a process-wetted metallic diaphragm in 316L.

Process connections

Available connections include G1"B flush-mounted thread, dairy pipe, Varivent N and DRD process adapters for hygienic installations.

Pressure ranges

The product family covers finely graduated pressure ranges from 0…100 mbar to 0…25 bar, plus selected vacuum ranges.

Output variants

Electronics versions provide one analog current or voltage signal, with variants for 2 or 4 PNP switch outputs and 24 VDC supply.

Data logger versions

The integrated memory records more than 500,000 measured values. A battery-backed version adds time stamp logging.

Local operation

A graphic color display and keypad provide local indication and configuration. The housing and display can be rotated.

Environmental ratings

The device is specified with ingress protection (IP65/IP67) according to EN/IEC 60529 and ambient temperatures from -20 °C to +70 °C.

Diagnostic functions

Integrated diagnostic functions support system analysis during commissioning and operation.