Will you be so kind to publish them…?
Sure, i ll upload it on printables 
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Hello, where did you see the informations ph and orp? Thank You
Thank You. But in my tuya I only see temperature?
Ok, I see you are using tuya local. I have a tuya developer account too but can’t get the local key for installing local tuya. I don’t know whats wrong? I have the device id.
Look for tiny tuya. It will allow you to get everything without tuya cloud.
Tutorals are available
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@Reunion974 Bonjour! I’m growing Tomatoes, Basil etc in my kitchen and would like to automatically track PH levels. Do you think this would be suited for a Hydroponics or this device too big?, e.g. https://fr.aliexpress.com/item/1005006228420223.html
Your setup really looks professional by the way. Nice work! Enjoy the pool.
Please tell me when you’ve done. Thank you
OK I just published it for you here:
https://www.printables.com/fr/model/870453-swiming-pool-circuit-probe-holder-for-ph-orp-tempe
Hello @Reunion974,
Looking at your thread with the utmost interest as I am planning to move away from one of these battery-powered in-pool analyzers that is a joke (outrageous running costs, lack of stability, not super reliable …). Your analyzer looks great but I’m still hesitant about moving to it due to its specific pH/ORP sensors.
I’m using an analysis chamber (Zelia Pod 2) and I am not sure I can use custom caps on it for the built-in probes… As it seems the probes are connected via standard BNC ports, do you think they can be replaced by standard ones you can easily find on the market?
Moreover, same as you did, I’m wondering how strong and resilient they are over time… It does not seem you can find a replacement on Aliexpress 
Your analysis chamber look nice. My chinese BNC probes are larger than the usual probes that you can find in the swiming pool shops, so they might be to large for your chamber inserts.
I didn’t have a chamber that’s why I designed my 3d printed system. You can still use it.
Yiery sell replacement probes for its products, very cheap (I checked before buying their product). You can contact them on aliexpress, they are quite reactive.
In a couple of months I’ll be able to give a first feed back on the reliability of this material. For the moment, I can’t affirm anything…
Thanks @Reunion974, following your advice, I had Yieryi contacted about their PH-W218 product and asked them about the sensors. They answered ANY BNC interface pH or ORP sensor would work with their product 
The only last drawback is the salinity sensor that does not show being connected via BNC and in any case, I have never seen a Salinity/TDS sensor similar form-factor than the regular pH/ORP sensors with BNC connectivity
I’m very close to letting my curiosity click on “buy” 
Not sure about the durability of the device same as you, but only time will be able to say.
They’ve also shared with me all the docs and videos of the product.
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Thank you very much!
I appreciate this thread is now quite old but I am implementing the same device.
I wondered how it worked in practice. I have calibrated mine but not installed it yet. Thst will be next week.
Thank you.
@Reunion974
Do you have feedback on the reliability of the ORP measurement of the Yieryi device?
I finally found the solution to my sealing problem around the probe installation and I set it up yesterday.
I am really surprised by the values I am getting. The ORP level was quite low yesterday, but I assume that is normal as the chlorine level is still low. However, today, after the pump was turned on, the ORP value dropped below 0. This is very strange to me.
Do you have any expertise on this? Is there a link between the water flow and the measurement?
Hello @starpom,
I’m also getting issues with the ORP values. I exchanged many messages with yieryi support and they are sending me a new probe. According to them the problem is coming from my ORP probe so it should be solved with the replacement. That’s why I was waiting to reveive the new probe before posting my conclusions.
However with the current probe, the ORP value is too low and incoherent with the chlorine strip test value.
Do you have additional 256mV solution? I bought 15 of those and ran many times the calibration.
How did you install your probes?
If like me you did it directly inside de swiming pool pipe, you could try to compare the values measured:
- directly in the pipe
- on a glass containing water from your pool
If the values are different, there may be a problem with the insertion in the pipe or the waterflow. At this point I don’t know if the flow, how the probe is turned can affect the measures.
From what I understood, those probes don’t like to be dry. If the probe is installed too hight in your water circuit, it may get dry when you stop the pump.
An other potential problem is that the shipping from China to my location take 40 days and the probe is dry during all this time. That may be a problem.
Those probes are standard that would be interesting to test with an other probe (a probe bought locally in a regular swiming pool shop). If the measure is ok it could mean that the problem is coming from the probe.
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Thanks for the anwser.
I’m interested to have your assistance contact to Yiermi. I tried to contact the aliexpress seller without succes.
I installed the probes in the main measurement cell, but I remarked that but to gas creation during the electrolysis process, I have sometimes a gas volume encapsulation and the probe were not anymore in contact with the water.
so I moved the probe lower in the instalation right after the filter. so now, it’s fully wet all the time.
Did I damage the probe ? maybe, I have to check with the calibration solution.
Anyway, there is a link with the flow :
every 2h, my pump is going faster during 5min for surface cleaning. we can see the impact on the ORP measurement.
The ORP value is getting crazy also when the pump is off.
Looking to the Ph measurement, it’s also quite strange. I put the probe into a bucket of water since more than 2 weeks. I can understant a deviation due to the water temperature evolution during the day but the deviation here is so big that it’s not only linked to the temp.
I’m starting to think that this device is not realiable enough and I loose my money.
It is recommended to install the probes before the electrolyser in your water circuit to avoid interaction like the one you describe.
So you made your measures from your water circuit and also from a water bucket.
The pH measurement you show is very basic. Is it from the bucket of water or from your water circuit?
I contacted Yieryi support directly from their store in aliexpress
When the pump is not active, the water in the circuit is not the same as in the pool. So I made choice to connect the water analyser power with the pump. So the sensors are unavailable when the pump is off. I used templates with trigger sensor, so they keep the last good value in memory and my dashboard keed displaying it.
The values I get for pH are reliable and very stable. So I can understand your cyclic variations if you measure from your water circuit. I’m not an expert in redox but I could understand that something in a closed circuit make the value wrong and as soon as the water circulate, the measure is back good. This look like what you could get from a temperature sensor in your circuit.
But if it’s from a water bucket, there’s a big problem!
Hi,
thanks for sharing the information, after reading this thread I also buy the “ph w218” device, it’s very easy to integrate with HA. The values looks ok: ph measure, temperature…, but the ORP values are to low:
Water chlorine test reports a good value.
@Reunion974: Did you get the new probe? Does it solve the issue on lower orp values?
thanks.