Thermal dispersion flow switch | SPX20000 - insertion length 50mm - 1/4″ NPT

Thermal dispersion flow sensors measure the velocity of a fluid in a pipe or duct.
The sensor probe contains two major components: a heater sensor and a temperature sensor.
The heating sensor is placed closest to the flowing fluid and provides constant heat.
The temperature sensor measures the temperature given off by the heating sensor.

When liquid flows, there is a temperature difference between the two sensors.
This temperature difference is proportional to the flow rate (fast flowing fluids cause a larger temperature difference and vice versa). Because the unit contains no moving parts, there is no wear and tear and it has a long life.

Applications:
Petrochemicals, hydroelectric plants, shipyards, HVAC systems, steel industry, food and beverage industry, pharmaceutical sector, optics and semiconductor industry, cooling water flow control - basically any pipeline in which flow of fluid needs to be measured.

SPX2 Specifications
Measuring range (Flow rate).	1~150 cm/s (water)
Ambient temp.	-20~80°C
Medium temp.	-20~85°C
Alarm output	Open: NPN/PNP (250mA) Relay:0.3A@125VAC,1A@30 VDC (NO or NC)
Operating pressure	100 bar (max.)
LED indicator	Red LED: flow rate is below the set point. Orange LED: flow rate is at the set point. Green LED: shows flow speed.
Housing	SUS304
Wetted material	SUS304
Protection level	IP67
Time to warm-up	15 seconds
Connection thread	G1/2
Power consumption	19~36Vdc
Power consumption	150mA(Max.at 24VDC)
Wiring	M12 4PIN Cable: 3 wires (NPN/PNP)/4 wires Relay (NO or NC) Power supply - brown, Grounding - blue, Output - black, Output - green/white (for relay)