VF-S Thermal Flow Switch is based on the theory of heat exchange. Heat and thermal module is built inside

the probe. The heat conductivity rate of the device is closely related to the flow rate of media.  If no media flows through the pipe, the thermal module gets the fixed heat quantity from the heat module. While there is flowing through the probe, the thermal module gets the heat quantity which varies with the flow speed. The thermal module converts  the differential  temperature signal  into electric signal  .Then  the signal processor exports 4-20mA  current  signal or  the  signal of  the switching point. It provides display, transmission  control and remote monitoring in one unit.

Operating range:

Water:  0-5 m/s

Oil:     0-10 m/s

Air:     0-100m/s

Operating voltage: 24VDC,220VAC,220VDC,110VAC,110VDC

Output: PNP/NPN/Relay

Response time:≤ 12s

Max pressure: 100bar

Display: LED for output indication

Current consumption ≤65mA

Switched current ≤400mA

Switch-on time typical 2s (1-13s)

Switch-off time typical 2s (1-15s)

Probes material 316 SST

Threaded type G1/2  (special type available on request)

Explosion Protection: ExdIICT4

IP Code: IP67