Author Topic: WH51 soil mosture calibration  (Read 333 times)

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Offline Rocketman

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WH51 soil mosture calibration
« on: February 13, 2023, 08:45:35 PM »
Any tips for calibrating the WH51 soil moisture sensor ?
Iím using 60 for my 0% and 310 for my 100% values with custom being set to ON
This seems to Ok for my soil type in the garden

What are other people using ?
« Last Edit: February 14, 2023, 02:13:37 AM by Rocketman »
HP2550 console 1.8.7 firmware  , WS80 weather station , WH57 lightning sensor , WH40 rain gauge , WH51 soil moisture sensor , GX1100 gateway 2.2.1 firmware

Offline davidefa

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Re: WH51 soil mosture calibration
« Reply #1 on: February 14, 2023, 03:46:45 AM »
I'm using 140 and 230, my soil never goes beyond those ( quite limited ) limits

P.S.
Couple of old threads on wh51 I bookmarked:
https://www.wxforum.net/index.php?topic=39757.msg429905#msg429905
https://www.wxforum.net/index.php?topic=39633.msg426659#msg426659

Offline Rocketman

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Re: WH51 soil mosture calibration
« Reply #2 on: February 14, 2023, 03:01:37 PM »
not much change overnight
I have re-adjust to 160 and 310 see what happens today
HP2550 console 1.8.7 firmware  , WS80 weather station , WH57 lightning sensor , WH40 rain gauge , WH51 soil moisture sensor , GX1100 gateway 2.2.1 firmware

Online Rover1822

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Re: WH51 soil mosture calibration
« Reply #3 on: February 14, 2023, 03:07:48 PM »
I don't calibrate these. Each year, I stick them into a bucket filled with homogenously mixed dirt/water, check their readings, move them , repeat, so when I know they are all reading near the same, I use their values. I have 12. My purpose is to measure soil moisture in very large pots that I grown vegetables in.
 
Ambient:
  WS-2000
  PM 2.5(2)
  WH31B(2)
  WH40E
  WH31P
EcoWitt:
  GW1100
  GW1000(4)
  WH31(2)
  WH57
  WH51(12),
  WH40
  WH5360B
  WN34S
  WittBoy WS90 + GW2000
  WS90 (other one) + GW1100
Personal Sites: Weather Cam

Offline Rocketman

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Re: WH51 soil mosture calibration
« Reply #4 on: February 14, 2023, 05:15:39 PM »
I only got one sensor it was set on default and was running between 25% and 45 %
just trying to get the settings running a bit more realistic
HP2550 console 1.8.7 firmware  , WS80 weather station , WH57 lightning sensor , WH40 rain gauge , WH51 soil moisture sensor , GX1100 gateway 2.2.1 firmware

Offline solartempest

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Re: WH51 soil mosture calibration
« Reply #5 on: February 14, 2023, 10:10:47 PM »
For inorganic granular mixes of high porosity (comprised of granite grit, turface, pumice, scoria, etc.), I am using 110/200 and 110/160 depending on the ratios. This is for growing a large number of succulent plants as well as containerized trees.

For my garden, I'm using different settings which I don't remember exactly the calibration. Sensor is packed for the winter, but I calibrated from fully saturated to quite dry/a bit past the drought stress point.

Overall, it's the trend of the data that's most useful to determine when to water.
Ecowitt GW1000, HP2553BC, WS80, WH51x4, WH41, WH45, WH40, WH32, WH31x2, WH57x2.

Offline Rocketman

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Re: WH51 soil mosture calibration
« Reply #6 on: February 15, 2023, 12:57:19 AM »
My garden only basic potting mix , but we getting so much rain lately itís a waiting game  ](*,)
HP2550 console 1.8.7 firmware  , WS80 weather station , WH57 lightning sensor , WH40 rain gauge , WH51 soil moisture sensor , GX1100 gateway 2.2.1 firmware

Online Rover1822

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Re: WH51 soil mosture calibration
« Reply #7 on: February 15, 2023, 02:36:10 PM »
Quote
Overall, it's the trend of the data that's most useful to determine when to water.

I agree

I am more concerned about relative values as long as all are reporting within reasonable variance. They are invaluable to me, as I grow very thirsty plants in very large pots. Over the years, they have stopped me from overwatering , and identifying low water conditions.

Growing in pots, to start with, with tomatoes, peppers etc.. , is challenging upon itself as each pot is its own environment, I have a micro watering system that I adjust based on the knowledge gained from the sensors



Ambient:
  WS-2000
  PM 2.5(2)
  WH31B(2)
  WH40E
  WH31P
EcoWitt:
  GW1100
  GW1000(4)
  WH31(2)
  WH57
  WH51(12),
  WH40
  WH5360B
  WN34S
  WittBoy WS90 + GW2000
  WS90 (other one) + GW1100
Personal Sites: Weather Cam