Hot-film anemometer SCHMIDT Technology
SS 20.400

SCHMIDT® Flow Sensor SS 20.400 with flow direction detection

Thermal flow sensor which can detect the flow direction as well as it can measure the flow velocity of air and gas in both directions. This sensor is really tiny, the sensor measures only 9 mm in diameter. The complete microprocessor based electronic is housed inside the stainless steel sensor tube. The super fast sensor element allows reaction times down to 10 ms. A robust and aerodynamically designed chamber prevents the sensor element from any stress. Additionally to the analog output this sensor offers two digital outputs for the indication of the flow direction and of a limit value. A serial interface allows on-site programming of the sensor via PC.

Applications:
Laminarflow monitoring in cleanrooms, monitoring of overflow or backflow between rooms with low pressure difference, air quality measurements, cooling air monitoring, flow monitoring in passivation gas atmosphere, mobile air flow measuring, flow measuring in medical equipment, general volume flow measurements. Customised sensors are available on request.

Technical Data:
Design: Insertion sensor (Ø 9 x 130 mm), transformer integrated into sensor tube.
Application: Free flowing air and air in ducts from 25 to 1.000 mm,
Meas. ranges: 1 / 2,5 / 5/ 10 / 20 m/s (in both directions)
Response time: 10 ms to 10 s
Mounting: wall mounting, flange or through passage mounting
Power supply: 12 … 24 VDC / less than 10 mA
Analog output: 0 ... 2 / 5 / 10 V, 0 ... 20 / 4…20 mA
Digital outputs: 2 Open collector outputs for direction an limit detection, RS 232 for programming

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