The Type 8081 ultrasonic flow sensor is intended for the measurement of water flows which may be slightly charged with contaminants. It consists of an electronic module and a brass fitting with a built-in measuring tube. It enables a control loop to be established. The electrical connection is made via an 5-pin M12 fixed connector. The sensor features, depending on the version: - a pulse output or - a pulse output and a 4-20 mA current output. Each version is available for 5 flow ranges:

- model QN 0.6 DN15: 0.06 to 20 l/min (nominal flow rate 0.6 m3/h namely 10 l/min)

Electrical data

Power supply (V+) 12-36 V DC

Current consumption Own consumption: < 4 mA

Consumption with load: < 1 A

Reversed polarity of DC Protected

Voltage peak Protected

Short circuit Protected for transistor output

Output

Pulse (transistor)

version without current output

version with current output

Current

NPN (as default setting) or PNP (on request), open collector,

700 mA max., 5 mA min., NPN output: 0.2-36 VDC

PNP (as default setting ) or NPN (on request), open collector,

700 mA max., 5 mA min., PNP output: supply voltage (V+)

4-20 mA (sourcing mode and PNP transistor as default setting, sinking

mode and NPN transistor on request)

loop resistance max. : 1100 Ω at 36 V DC

610 Ω at 24 V DC; 100 Ω at 12 V DC

Scaling Pulse (Transistor)

Current

K-factor: 500 Pulse/Litre (version QN 0.6 and 1.5)

200 Pulse/Litre (version QN 2.5 - 3.5)

100 Pulse/Litre (version QN 6.0)

4 mA correspond to 0 l/min (by default) or to Tmin of temperature

range (on request)

20 mA correspond to Qmax. of flow range (by default) or to

Tmax. of temperature range (on request)