water flow sensor YF-B5

[niccodemi]

Hi,

I would like to use YF-B5 water flow sensor with default mysensors water-meter sketch. I need help getting correct PULSE_FACTOR value based on below specs:

1 Appearance Product identification clear, accurate and meet the requirements
2 water pressure> 1.75MPa
3 Operating voltage range DC5 ~ 15V
4 Insulation resistance> 100MΩ
5 Accuracy (in 1 ~ 25L \ MIN) ± 3%
6 Flow Pulse Characteristics (6.6 * Q) Q = L / Min ± 3%
7 Output pulse high> DC 4.7V (input voltage DC 5V)
8 Output pulse low level <DC 0.5V (input voltage DC 5V)
9 Output pulse duty cycle 50% ± 10%

#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95

#include <MySensors.h>

#define DIGITAL_INPUT_SENSOR 3                  // The digital input you attached your sensor.  (Only 2 and 3 generates interrupt!)

#define PULSE_FACTOR 1000                       // Number of blinks per m3 of your meter (One rotation/liter)

#define SLEEP_MODE false                        // flowvalue can only be reported when sleep mode is false.

#define MAX_FLOW 40                             // Max flow (l/min) value to report. This filters outliers.

[Yveaux]

@niccodemi the default water meter sketch measures water volume in m3, this sensor measures water flow in l/min.
Here you can find an example of how to convert flow sensor output to volume.

[niccodemi]

@yveaux is there any way to convert flow in l/min to pulses per liter?

Another user posted below info; is that accurate?

• • Flow meter using Honeywell C7195A2001B which has a hall sensor that pulses at 7 Hz per liter/min
• we count only upgoing pulses, so in our case we get:
• 7 pulses per second at 1 l/min
• 420 pulses per liter
• 420000 pulses per m3
• Flow meter Caleffi 316 which has a hall sensor that pulses at 8.8 Hz per liter/min (according to specs)
• In reality the frequency is about 30% lower in my case, so we have to correct this with a factor of 1.3.
• 8.8 pulses per second at 1 l/min
• 528 pulses per liter
• 528000 pulses per m3
• 528000/1.3 = 406154

[Yveaux]

@niccodemi said in water flow sensor YF-B5:

convert flow in l/min to pulses per liter

You can; read the example code I pointed to. And as always, Google is your friend