Hack for water chemistry probes while waiting for backordered JellyJar

Jul 6, 2018
5
Allen,tx
Like many, I was hit with some freeze damage during the winter deep freeze in Texas. I was fortunate to have a whole home generator which saved me from more severe damage. I did not however escape unscathed. My Intellichem JellyJar cracked as did the housing and intake filter. Anyone who has suffered the same fate knows that it's impossible to get another one for time time being. So what to do ? Well, I quickly got to work trying to epoxy the jar and even put a thick layer of marine epoxy inside the jar hoping it would be strong enough to withstand the 12-20 PSI it would be subjected to. In each attempt the jar held together for a few days then would ultimately fail. After the fourth attempt to keep the jar intact using more epoxy and wrapping the jar with steel clamps it became apparent I needed a workaround. You may be asking, why bother.. Just manage the pool like everyone else does. Well, first off I love automation, and over the past two summers, I have dialed in the CO2 injection and ORP to the point that I typically only have to mess with the chemistry a few times per year. So for me the effort is worth it. My solution came to me out of another hobby in Ham Radio. To solve the problem, I just got a couple 50' RG-6 coax cables, 4 PL-259 to BNC adapters and (2) BNC-BNC female couplers. This allowed me to connect the coax to the existing probe wiring and run them to the pool and connect the coax to the probes where they could sit in the water.

Works like a charm... Interested to know if anyone else tries this or has done something similar.. Please comment...
 

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I had a similar issue with my Hayward system after the freeze. The cell used to mount probes cracked. Fortunately for me I was able to find the part within a few days. Are you using the full 50ft?? I’’m really surprised attenuation is not an issue. Are you seeing and unusual fluctuations in ORP? That probe for me seems to be the most sensitive.
 
Yeah, I’m shocked. the extra cable is just spooled up. Couldn’t bring myself to cut perfectly good cable unnecessarily! No fluctuations. Measures are steady and spot on with the Taylor. I agree though, ORP is the most challenging. At first it was temperamental. I had to reseat the connection and then it worked. I’ve also noticed I have to bathe the orp sensor in a weak acid solution every 4-6 months or so for about 5 minutes else it starts to go wonky.
 
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