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Specifications
- Brand Name: HaiHuiLai
- DIY Supplies: Electrical
- Model Number: NPT3/4-01
- Flow rate: 2~45 LPM
- Product name: water Brass Hall turbine flow sensor
- Material: Brass& Plastic
- Size: Male NPT 3/4 inch
- Flow pulse: F(Hz)=(8.1Q) -3 +/- 10% Q: L/min
- Wire Length: 350+/- 10 mm
- Pulse: 1L water =477 pulse
- Voltage: DC4.5~18V
NPT 3/4" DN20 water copper Brass Hall flow sensor turbine meter
Price history
- for 3 month
- for half a year
- Requires Alitools extension
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Customer Reviews
Not arrived until today 02 June 2019 Lost in space?
Sensors work as described. Mine have 3/4 NPT threads for North America, and the threads seem fine quality: no leaks when used with a bit of teflon tape. A test of the minimum detectable flow rate indicates that the sensors work slightly better than the spec of 2L/min, so that is good too. The item description did not indicate the wiring color code, so here it is: black=GND, red=5V, yellow=pulse output. The pulses are 5V logic levels, and in fact, they are not really pulses, but a periodic toggling of the output as the water flows. More water == faster toggling. Works fine with 5V Arduino. Also: Before I bought this sensor, I was wondering about the possibility of leakage due to the attachment of the sensor package. After receiving it, I removed the sensing hardware in one of the photos. You can see that there is absolutely no possibility for leakage due to the Hall sensor: it senses magnetically right through the brass body of the flow sensor.