there are different type of temp sensor, you need to find which type used in your chiller in the first place
hi all..
recently bought a HC100A chiller. trying to modify the temp prob. bought a ocean free external temperature reading and cut out the temp prob. after doing some wiring and everything, try connect it still fail to get any temp reading.. any one can help or which temp prob shld i get?

there are different type of temp sensor, you need to find which type used in your chiller in the first place
is there anyway i can find which type is the hailea using?
Did u use the ocean free digital thermometer probe?Can go to SLT B1 acez instruments they sell fox brand probe alone. arnd $1x Works for hailea
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you need multimeter![]()
yes. i'm using the ocean free digital thermometer probe. some of ppl work fine with the ocean free digital thermometer probe but i dun understand y mine cant.
so the fox brand probe works for hailea 100a?
coz my chiller currently keep cut in around 10mins. feel like its wasting my electrical.

yes, you can measure the resistance between two probe. Can also be use to identify whether it is resistive type or semiconductor type sensor.
What is the failure after you install new sensor?




That time i also have this problem kick in every 10min rest 10min for my chiller resun CL280 running wif ehiem 2213 set 23 degree. But after I change to ehiem 2026 no problem for me to set at 23 degree. It only kick in for 30min rest for 1hrs.
If you have a china brand chiller.. you will need a high flowrate canister to compensate for the probe being too economical, on the other hand we would be making a tsunami in the tank. best alternative is to change the probe from inside the chiller reservoir to an external temp probe which solves the problem. No need high flowrate, just sufficient to make sure your reservior does not freeze up..

expected, 2213 flow to low for CL280.
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is there any temperature probe that i can get at clementi or jurong side for my HC100a??





Best to use the correct temp probe for the external thermostat.
Probe resistance curves vary pretty wildly between different manufacturers, even between product lines.
Even if it's in the same ballpark resistance at 1 temp, it might not be in the same ballpark when the temp is +4deg.
The stock probe can be gently massaged (yanked for the non gentle) out, stick the right one for your thermostat in it's place and you should be set.
hi all..
thanks for all the suggestion.
i got the temp probe from Bro malvin and its working fine now.
manage to connect it.




Shadow : The curve is non-linear, if you "compensate" it as per what you've mentioned, it'll be accurate for only that temperature. (Which is what I was trying to get at in my above post). Not sure if it's too much of a concern for aquarium though.

yes you are correct. It is not linear if you are talking about about full range. But our concern is only around 24-28 degree C, it should be linear enough.
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