The model KAL-L electronic flow switch monitors air and gas flow. It is suited for securely monitoring flows with minimum pressure loss.
The operation of the electronic flow switch KAL-L is based on the proven calometric principle. A sensor is heated to a few degrees above the temperature of the flow medium. When the medium flows, the heat generated in the sensor is transferred to the medium, i.e., the sensor is cooled.
This cooling process is a measure of the flow velocity. A second sensor measures the medium temperature. The electronics compares the resistances of both sensors by means of a bridge circuit and switsches an output relay if the actual value drops below the set switching value.
Voltage: 24 V ac/dc
Power: 4 A maximum
Ambient temperature: -10 °C … +60 °C
Medium temperature: 2510 °C … +120 °C
Max. pressure: 8 bar
Warm-up time: max. 30 s
Switching range: 1 … 20 m/s (at 20 °C, 1 bar)
Switching accuracy: ± 10% of reading
Repeatability: ± 1% of reading
Response time: 1 … 60 s
Flow rate indication: 8 digit LED bar graph
Outer dimensions (W) x (D) x (H): 80 x180 x 100 mm