Possible areas of application
Push-in flow sensors of the type VTH20 were specially developed for the installation in fittings and feature an easy and space-saving system integration. Typical applications for these flow sensors are:
- Tap water detection
- Water treatment
- Leak detection
The liquid flowing into the turbine flow sensor is split into individual jets by the guiding blade. These jets hit the rotor evenly from different directions, setting the rotor in motion. The rotation speed of the rotor is then converted to an electrical pulse signal (frequency): The rotor is fitted with magnets and a Hall effect sensor detects the rotation of the rotor.
A flow-proportional frequency signal (square-wave signal) is made available.
The construction of the guiding blade and rotor enables to realize the very low start-up flow values.
In general, push-in flow sensors consist of three components: push-in turbine, Hall effect-sensor and adapter sleeve for Hall effect sensor. This three-part construction is the key for the space-saving installation in e.g. filter heads and allows the separate installation of hydraulic and electrical components. A high quality sapphire bearing guarantees a long durability of the measuring system and allows the measurement of low flow rates from one litre per minute due to low start-up velocities.
- Low deviation in mass production, fixed pulse rate
- Low start-up
- High measuring accuracy
- Compact dimensions
- Proven in numerous mass production applications
|Flow range||1...42 l/min with continous operation max. 25 l/m|
||±1 % of range
±3 % of reading (from 15 l/min)
|Signal output||From < 20 l/h|
|Medium temperature||0...85 °C|
|Nominal diameter||DN 20|
|Hall effect sensor|
|Nominal pulse rate
|232 pulses / l
NPN open collector
|Power supply||10...30 VDC (optional 4.5...26.5 VDC)|
|Electrical connection||2 m PVC cable, shielded (Tmax = 75 °C)|
|Adapter sleeve for Hall effect sensor|
|Pressure rating||PN 10|
|Process connection||G⅜ A|
Further details and accessories can be found in the datasheet.