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DF-20 Flow Transducer

Flow transducer for fluids
Used for measuring fluid flow volumes and speeds, the DF-20 flow transducer can be used on our DMZ-X units, for example. It is well-suited for low-solid content fluids. The fluids must be transparent to infrared light (e.g., water, oil, chemicals). The DF-20 is appropriate for flow rates of 0.5 – 20 liters per minute (for DMZ-4 / DMZ-8: 0.5 - 5 liters per minute). It is equipped with 3/8" AG connectors. Some suggested areas of application are: filling equipment, such as in the food and drink industry, cooling water monitoring, wastewater engineering, general mechanical engineering, or the chemical industry. Thanks to the materials used (plastic and stainless steel), it is able to measure aggressive media.

Technical Data

Power supply voltage
5 ... 24 V DC, (12-24 mA)

Output signal
Pulses: approx. 100 - 2000 Hz,
Square-wave NPN OPEN collector

Flow volume
0.5 - 20 liters / min. (water)
The flow transducer is designed for low-viscosity fluids (solids < 20 µm). When using with DMZ-X, only frequencies up to 500 Hz can be evaluated, corresponding to 0.5 - 5 liters / min.

Startup value
approx. 0.08 liters / min

K factor
approx. 6000 pulses / liter

Measurement accuracy
1 % from final value

0.3 % of measured value

Max. operating pressure
16 bar

Medium temperature
- 20 °C ... + 90 °C

3/8" AG

Housing: PVDF
Turbine wheel: Vectra rotor
Standard: Viton,
Optional: EPDM

Protective class

W / H / D : 58 x 90 x 85 mm

Ordering information:
DF-20: E1799

pdf data sheet (german)

pdf description (german)