Precont® ML
Pressure transmitter for measurement of absolute or relative pressure in gases, vapors, liquids and dust
- EHEDG-compliant hygienic process connections
- CIP and SIP capable
- Process temperatures up to 150°C
Description
The device Precont® ML is an electronic pressure transmitter for continuous measuring of relative or gauge pressures in gases, vapors, liquids and dusts within closed container or pipes.
The use of a piezoresistive measuring sensor with EHEDG conformal metallic membrane and the corresponding excellent characteristics, allows the use especially in hygienic applications.
Function
The device is mounted in the wall of the pressure container or of the pipe.
The system pressure is applied to the metallic membrane and causes there a variation of the resistance of the strain gage at the back side of the membrane.
The metallic membrane offers excellent characteristics like high pressure and pressure blow strength, vacuum resistance, high accuracy and reproducibility, good long term stability and a low temperature influence.
A FDA-listed pressure transmitting liquid is used for the transmission of the pressure from the membrane to the strain gage.
The pressure signal, that is transmitted by the membrane to the sensor is converted into an electrical signal and converted by the integrated evaluation electronic into a current signal 4…20 mA resp. voltage signal 0…10 V.
| Supply current | |
|---|---|
| 4…20mA 2-wire | 10 V…30 V DC |
| 0…10V 3-wire | 14 V…30 V DC |
| Power supply | |
|---|---|
| 4…20mA 2-wire | ≤ 30mA |
| 0…10V 3-wire | ≤ 6mA |
| Measurement accuracy | |
|---|---|
| Characteristics deviation | ≤ ±0,5% FS |
| Long term drift | ≤ ±0,2% FS/year, not cumulative |
| Temperature deviation | ≤ ±0,2% FS/10K (Zero / Span) |
| Material | |
|---|---|
| Membrane (medium contact) |
Steel 1.4535 (316L) |
| Process connection (medium contact) |
Steel 1.4535 (316L) |
| Connection housing | CrNi-Steel |
| Gaskets (medium contact) |
FPM – fluorelastomere (Viton®) EPDM – ethylene-propylene-dienmonomere, FDA-listed silicon |
| Electrical connection part | Electrical connection type V – Plug M12: Device plug PUR Electrical connection type S/T – Plug EN 175-301-803: Device plug PA / Gasket NBR |
| Electrical connection | Cable gland PA / Gasket CR / NBR / Cable sheath PE |
| Environmental conditions | |
|---|---|
| Ambient temperature | -40°C…+85°C |
| Process temperatures | -20°C…+150°C |
| Process pressure ranges | -1…+25bar |
| Protection | IP65 (EN/IEC 60529) IP68 [≤ 1mWS – 1h] (EN/IEC 60529) |
