Turbine flow sensors with threaded connection / Version for HVAC and industrial
型號：Type VT40- Pressure rating up to 50 bar
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The SIKA turbine flow sensor type VT40 is used for flow measurement and dosing in water and water mixtures. The sensor is used in many applications, including:
- monitoring of cooling circuits in machine and plant construction
- water treatment
- cleaning processes
- dosing
The liquid flowing into the turbine flow sensor is divided into partial jets by the blading. These hit the rotor uniformly from different directions and cause it to rotate. The speed of the rotor is now converted into an electrical pulse signal (frequency): The rotor is equipped with magnets, a Hall effect sensor detects the rotational movement.
A flow proportional frequency signal (square wave signal) is available.
The geometry of the blading and rotor enables the realization of very low start-up values.
Series
VTH40
VTM40
- Cost optimized version
- Pressure rating up to 50 bar
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Type
VTH40
VTM40
Material pipe section
Brass
Flow range
0.4...25 m³/h (6.7...417 l/min)*
Accuracy
±7 % of the measured value between 0.4...3 m³/h
±5 % of the measured value between 3...25 m³/hRepeatability
±0.5 %
Signal output
From 0.28 m³/h
Medium temperature
0...85 °C (non-freezing)
Pressure rating
PN 10
PN 50
Nominal diameter
DN 40
Process connection
G 2 male thread, supplementary screwed connection recommended
Sensor
Hall effect sensor
Output signal
→ Pulse rate / K-factor
→Resolution
→ Signal shape→ Signal current
26.6 pulses/l
37.6 ml/pulse
Square wave signal
NPN open collector
Max. 19 mAElectrical connection
2 m PVC cable, shielded (Tmax = 75 °C)
4 pin plug connector M12 x 1
Power supply
10...30 VDC
optional 4.5. 26.5 VDC6.5...24 VDC
short circuit proof and reverse polarity protectedDegree of protection
IP54
Max. particle size in the medium
< 0.63 mm
Integrated screen filter
Flat filter, mesh size 0.63 mm
* not suitable for continuous operation