Liquid Flow Meter - Brass 1/2" Nominal
Threaded
PRODUCT ID: 833
DESCRIPTION
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Measure liquid/water flow for your solar, computer cooling, or gardening project
using this handy basic flow meter. This sensor sit 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 brass tube that can measure how many spins the pinwheel has
made through the metal wall. This method allows the sensor to stay safe and dry.
The sensor comes with three wires: red (5-18VDC 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
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. It will need
careful calibration if better than 10% precision is required. However, its great for
basic measurement tasks!
We have an example Arduino sketch that can be used to quickly test the sensor - it
will calculate the approximate quantity of fluid in liters and display on an LCD or
the serial monitor.
http://www.adafruit.com/products/833
11/27/2015
Technical Details
Electrical:
Working Voltage: 5 to 18VDC
Max current draw: 15mA @ 5V
Working Flow Rate: 1 to 30 Liters/Minute
Working Temperature range: -20°C to 80°C
Working Humidity Range: 35%-80% RH
Maximum water pressure: 1.75 MPa
Output duty cycle: 50% +-10%
Output rise time: 0.04us
Output fall time: 0.18us
Flow rate pulse characteristics: Frequency (Hz) = 8.1 * Flow rate (L/min) - 3
Pulses per Liter: 485
Durability: minimum 300,000 cycles
Mechanical:
1/2" nominal pipe connections, non-tapered, 0.78" outer diameter, 1/2" of thread
The input of these adapters is 1/2" NPT aka National Pipe Thread (tapered) and the output is 1/2"
BSPP aka British Standard Parallel Pipe (non-tapered).
Size: 2.65" x 1.0" x 1.4"
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