The Level Transmitter for sanitary use in smaller tanks

Alfa Laval Potentiometric Level Transmitter

Application
The Alfa Laval potentiometric level transmitter is designed to fulfil the demands in Sanitary and pharmaceutical production

Main features are:

- Wetted parts in AISI316L, stainless steel and PEEK
- Compact and hygienic design
- Process temperature -20...140°C
- Defined empty registration
- Local Led monitor in fieldhousing
- Insensitive to adhesive media
- Analogue output 4-20 mA

Standard range
The Alfa Laval potentiometric level transmitter is ideal for measurements in small vessels with tough, pasty or strong adhesive media, such as ketchup, honey, and toothpaste.
The integrated electronics provide a 4...20 mA output signal and has incorporated automatic recognition of top or bottom mounting position, even angled installation is possible.
Due to the high temperature limit the Alfa Laval potentiometric level transmitter is well suitable for CIP and SIP processes.
The hygienic installation is guaranteed by using the hygienic Clamp DN 50 (ISO2852) / Clamp DN 51 (DIN32676) connection

Working principle
The Alfa Laval potentiometric level transmitter utilizes the potentiometric measurement principle and can be used in all medias that have a minimum conductivity of 1 μS/cm.
From the low resistive measuring rod a high frequent current is fed through the medium to the tank wall. The voltage between the rod and the tank wall is measured. This output voltage is proportional to the tank filling level.
The measurement is unaffected by temperature and adhesive media.

Technical data
Measuring range: . . . . . . . . . . . . . . .0 to 300 cm
Resolution, input: . . . . . . . . . . . . . . .15 bit
Accuracy: . . . . . . . . . . . . . . . . . . . .±0.5% of FS
Repeatability: . . . . . . . . . . . . . . . . . .0.1% of FS
Media conductivity: . . . . . . . . . . . . . .Min 50 μS/cm

Important
Please observe that a non-linear conductivity in the media will affect the accuracy of the measurement. If mounted in a non-conductive tank such as a plastic tank a reference rod must be installed.

Mechanical data
Process connections: . . . . . . . . . . . .Clamp DN 50
(ISO2852)/Clamp DN 51
(DIN32676)
Materials
Wetted parts: . . . . . . . . . . . . . . . . .AISI 316
Fieldhouse . . . . . . . . . . . . . . . . . . .AISI 304
Operating temperature
Wetted parts: . . . . . . . . . . . . . . . . .-20 to 140°C
Fieldhousing: . . . . . . . . . . . . . . . . . .-20 to 60 °C

Power supply: . . . . . . . . . . . . . . . . .18-36 Vdc
Power consumptionmax: . . . . . . . . . .200 mA
Output: . . . . . . . . . . . . . . . . . . . . .4-20mA,max 500 Ohm,
Connection: . . . . . . . . . . . . . . . . . .M12 orM16 cable gland
Response time: . . . . . . . . . . . . . . . .10 ms