Alfa Laval Level Switch

 

 

- Wetted parts in AISI 316L, stainless steel and PEEK
- Compact and hygienic design
- Process temperature -40...200°C
- LED indicator integrated into the field housing
- Not influenced by foam
- Ideal for media registration through registration of changes in product dielectricity
- Quick teach option for difficult medias
- Maintenance free

 

Standard range
The Alfa Laval level transmitter is ideal for measurements in liquids such as water and beer as well as viscous, sticky fluids, such as honey, yoghurt and toothpaste. Even dry medias can be measured, eg. sugar or flour.

 

The integrated electronics provide a digital logic signal and has incorporated automatic compensation of foam, bubbles and condensate as well as sticky media.

 

Due to the high temperature limit the Alfa Laval level switch is well suitable for CIP and SIP processes.

The hygienic installation is guaranteed by using the hygienic Clamp DN 38 (ISO2852) / Clamp DN 40 (DIN32676) connection.

 

Working principle
The Alfa Laval level switch uses a high frequency signal sweep which is radiated from the sensor tip into the tank. The media will act as a virtual capacitor which, together with a coil in the sensor head, will form a circuit creating the switch point signal. This virtual capacity will depend on the di-electric value of the media which is well defined for most medias

 

Technical data
Accuracy repeatability: . . . . . . . . . . .±1 mm.
Hysteresis: . . . . . . . . . . . . . . . . . . .±1 mm
Measures values with dielectric values : .>1.5

 

Mechanical data
Process connections
Process connections . . . . . . . . . . . . .Clamp DN 38 (ISO2852)/Clamp DN 40 (DIN32676)

 

Materials
Wetted parts: . . . . . . . . . . . . . . . . .AISI 316 and PEEK
Fieldhousing . . . . . . . . . . . . . . . . . .AISI 304

 

Operating temperature
Wetted parts: . . . . . . . . . . . . . . . . .-40to85°C(140°C < 1 hour)
With cooling tower: . . . . . . . . . . . . . .-40 to 200°C (option)
Field house: . . . . . . . . . . . . . . . . . .-40 to 115 °C.

 

Protection class . . . . . . . . . . . . . . . .IP67
Max media pressure: . . . . . . . . . . . . .40 bar

 

Weight
Sensor: . . . . . . . . . . . . . . . . . . . . .approx 500 gr.

 

Certificates
- CE marked
- 3A (option)
- 3.1B certificate (option)
- ATEX certificate (option)

 

Electrical data
The integrated electronics features short circuit and high temperature protection.

Power supply: . . . . . . . . . . . . . . . . .18-36 Vdc
Power consumption max: . . . . . . . . . .70 mA
Output: . . . . . . . . . . . . . . . . . . . . .logic, either digital, PNP or NPN
Max output current: . . . . . . . . . . . . .50 mA
Electrical connection: . . . . . . . . . . . .M12 orM16 cable gland
Response time: . . . . . . . . . . . . . . . .<0.1 sec