Rain gauge calibration

[deanfourie (Dean)]

Im trying to calibrate a rain gauge, but i’m a little confused.

I’ve measured that the rain gauge takes 15mL of water to tip.

On the rain gauge, is written M0.2.

Im assuming this is 0.2mm?

So, would be

  - platform: pulse_counter
    name: 'Rain'
    # pin ADC1_1
    pin: 
      number: 32
      mode: INPUT_PULLUP
    internal_filter: 13us
    update_interval: 1s
    count_mode:
      rising_edge: DISABLE
      falling_edge: INCREMENT
    unit_of_measurement: 'pulses'
    filters:
      - multiply: 0.2000

Am I at least on the right track?

Thanks

[Mahko_Mahko]

Seems reasonable to me.

[deanfourie (Dean)]

Im a little confused how to test this.

If I pour 150mLs of rain in,

How much rainfall would it be in mm.

[Mahko_Mahko]

150 X 0.2 = 30mm?

A 0.2mm tip send to be relatively common.
https://www.google.com/search?q=rain+gauge+0.2mm+tip&oq=rain+gauge+0.2mm+tip&aqs=chrome..69i57j33i160l2.11462j0j4&sourceid=chrome-mobile&ie=UTF-8

[deanfourie (Dean)]

Im just wondering if I got the multiply value correct.

    filters:
      - multiply: 0.2000

[deanfourie (Dean)]

Assuming that this guys has a rain gauge tip of 0.2800

    filters:
      # Each 0.011" (0.2794mm) of rain causes one momentary contact closure
      - multiply: 0.2794
    accuracy_decimals: 4

hugokernel/esphome-weather-station/blob/master/README.md

[Mahko_Mahko]

I would have thought it would be ok.

[deanfourie (Dean)]

Lets pour 150ml in and find out

[deanfourie (Dean)]

150ml of water returns 2.5mm.

[Mahko_Mahko]

Might be a good idea to keep your original sensor as a straight pulse counter (remove filter).

Then create a “copy sensor” and add your filter to that.

Then you can check the number of tips recorded are as per actual.

But yeah, seems way off…

Copy Integration

[Mahko_Mahko]

Also looks like you need to add total to get a cumulative count I think?

Pulse Counter Sensor

[deanfourie (Dean)]

I have a daily rain total.

[JulianDH (Julian Hall)]

I went with electronic Hydreon RG15, BUT If you want a conversation about rain gauges this is the thread to take a look at… everything you need to know including how to set up the templates… I am using Utility Meter platform to count the rain …but some people have used custom scripts to read a rolling 7 days…

DIY Zigbee rain gauge

hello i tried al lot, but won´t get it… both binary_sensor.rainfall_trend gradient and sensor.regensensor_flips_zero_reset are 0 at this moment (as Development/States show me) TemplateEditor shows me the correct result = 0 for the following expression… {% set rain_hour = ((state_attr('binary_sensor.rainfall_trend', 'gradient') | float(0)) * 3600) | round(1, 'floor') %} {% if states('sensor.regensensor_flips_zero_reset')|int() > 0 %} {{ max(rain_hour, 0) }} …

[deanfourie (Dean)]

If I set my multiplier to 1, I get 60 pules per tip.

[deanfourie (Dean)]

Also, any idea why this does pulse count value does not increase, it resets after the update_interval times out.

  - platform: pulse_counter
    name: 'Rainfall'
    id: rain_gauge
    # pin ADC1_1
    pin: 
      number: 32
      mode: INPUT_PULLUP
    internal_filter: 13us
    update_interval: 60s
    count_mode:
      rising_edge: DISABLE
      falling_edge: INCREMENT
    unit_of_measurement: "ml"
    icon: "mdi:water"
    filters:
      - multiply: 15.0000