Precont® PS4LM
Pressure Switch for hygienic applications
- EHEDG-compliant hygienic process connections
- Analog and up to 2 switching outputs
- Process temperatures up to 150 ° C
Description
The Precont® PS4LM is an electronic pressure switch for monitoring, control as well as continuous measurement of pressures in gases, vapors, liquids and dusts.
The pressure switch 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 pressure switch 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 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.
| Auxiliary power | |
|---|---|
| Supply voltage | 10,5 V…35 V DC, 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 – Power 4…20mA | |
|---|---|
| Operating range | 3,9mA…21mA min. 3,8mA max. 22mA |
| Permitted load | ≤ (US – 10,5V) / 20mA |
| Start-up time | ≤ 1 ms |
| Measuring accuracy | |
|---|---|
| Characteristic deviation | ≤ ±0,5% FS |
| Long term drift | ≤ ±0,2% FS/year, not cumulative |
| Temperature deviation | Zero: ≤ ±0,02% FS/K (0°C…+80°C) Zero: ≤ ±0,03% FS/K (+80°C…+150°C) Zero: ≤ ±0,04% FS/K (0°C…+80°C) Zero: ≤ ±0,06% FS/K (-20°C…0°C / +80°C…+150°C) Span: ≤ ±0,02% FS/K (0°C…+80°C) Span: ≤ ±0,03% FS/K (-20°C…0°C / +80°C…+150°C) |
| Materials | |
|---|---|
| Diaphragm (process wetted) |
Steel 1.4535 (316L) |
| Process connection (process wetted) |
Steel 1.4571 (316L) |
| Connection housing | CrNi-Steel |
| Gaskets (process wetted) |
FPM – fluorelastomere (Viton®) EPDM – ethylene-propylene-dienmonomere, FDA-listed |
| Environmental conditions | |
|---|---|
| Environmental temperature | -40°C…+85°C |
| Process temperature | -20°C…+150°C |
| Process pressure | -1bar…+25bar |
| Protection | IP65/IP67 (EN/IEC 60529) |
