
It works for me, ½ star removed as the first leaked during installation and had to be replaced. However, the Revain replacement was quick and great! In solving the equation, I used 380 µl per leading edge for the volume and 22.8 ml/min per Hz for a rate of 38 Hz/(l/m). I measured 25-26 Hz per LPM ±2%, pulse rate 1/3 slower, required higher volume/flow per pulse calculation. Like a microcontroller: set an interrupt for the rising edge of the sensor on the I/O pin where the sensor is connected. 1 second timer (hardware interrupt timer or other tasks during polling) After one second: // volume in litersVolume = up counter * 380e-6 * 1.5; // 1.50 is my calibration adjustment base for 38 Hz/(L/min)//rate in ml/minute rate = Risingedgecount * 2.28e-2 * 1.5; // 1.50 is my calibration base for 38 Hz/(l/m). With a 1.50-fold correction for both flow and volume, the meter is correct to 20 liters, i.e. safely switched off and therefore ready for use. I'm a little slower, don't know why, or the equation has changed and the description hasn't been updated. Minus ½ star for the headache of sizing. Trouble-free use with 1.5-fold correction from the description equation (25.33︦3 Hz per l/m)

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