Liquid Flow Meter - Plastic 1/2" NPS Threaded

Liquid Flow Meter - Plastic 1/2" NPS Threaded info

You can measure liquid/water flow for your solar, computer cooling, or gardening project using Liquid Flow Meter - Plastic 1/2" NPS Threaded. This sensor sits in line with your water line, and uses a pinwheel sensor to measure how much liquid has moved through it. The pinwheel has a little magnet attached, and there's a hall effect magnetic sensor on the other side of the plastic tube that can measure how many spins the pinwheel has made through the plastic wall. This method allows the sensor to stay safe and dry.

Liquid Flow Meter - Plastic 1/2" NPS Threaded comes with three wires: red (5-24VDC power), black (ground) and yellow (Hall effect pulse output). By counting the pulses from the output of the sensor, you can easily track fluid movement: each pulse is approximately 2.25 milliliters. Note this isn't a precision sensor, and the pulse rate does vary a bit depending on the flow rate, fluid pressure and sensor orientation. Liquid Flow Meter - Plastic 1/2" NPS Threaded will need careful calibration if better than 10% precision is required. However, it is great for basic measurement tasks.

Liquid Flow Meter - Plastic 1/2" NPS Threaded - General Specifications

• Threaded plastic liquid flow meter
• Uses hall effect method for measurement
• Great for basic measurements

Liquid Flow Meter - Plastic 1/2" NPS Threaded - Technical Specifications

• Operating Voltage: 5 to 18VDC
• Max current draw: 15mA @ 5V
• Operating Flow Rate: 1 to 30 Liters/Minute
• Operating Temperature range: -25 to 80°C
• Operating Humidity Range: 35%-80% RH
• Maximum water pressure: 2.0 MPa
• Output duty cycle: 50% +-10%
• Output rise time: 0.04us
• Output fall time: 0.18us
• Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min)
• Pulses per Liter: 450
• Durability: minimum 300,000 cycles
• Size: 2.5" x 1.4" x 1.4"

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References

Adafruit Web Site: https://www.adafruit.com/products/828