Series

 VTH20

 VTL20

• With protection circuit 

• High resolution of output signal

• Cost optimized version 

 Type

 VTH20

 VTL20

 Material pipe section

 Brass

 Flow range

 1...42 l/min*

 Accuracy

 ±1 % of range 

 ±3 % of reading (from 15 l/min)

 Repeatability

 ±0.2 %

 Signal output

 From 0.25 l/min

 Medium temperature

 Max. 85 °C

 Pressure rating

 PN 10

 Nominal diameter

 DN 20

 Process connection

 G 1 male thread

 Sensor

 Hall effect sensor

 Output signal

 → Pulse rate / K-factor 

 → Resolution 

 → Signal shape 

 → Signal current 

 232 pulses/l 

 4.3 ml/pulse

 Square wave signal NPN open collector 

 Max. 19 mA

 116 pulses/l 

 8.6 ml/pulse 

 Square wave signal NPN open collector 

 Pulse duty ratio 50:50 

 Max. 10 mA

 Electrical connection

 2 m PVC cable, shielded (Tmax = 75 °C)

 Power supply

 10...30 VDC

 optional 4.5...26.5 VDC

 4.5...24 VDC

 Degree of protection EN 60529

 IP54

 Max. particle size in the medium

 < 0.63 mm