Thermostat for cooling fan.

[MarkO1]

There's got to be a cheap and easy way to hook up my cooling fan to a thermostat. I think I could do it easily done by air temp, but would prefer a thermostat with a submersible temperature probe. Anyone ever see or make something like this?
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Mercedes M Class

 

[aliendomain]

The only thing I could think of with a submersible temperature probe would be something like a Medusa Heater/Chiller Controller but that's allot to spend on a fan controller. Is this for a fan that cools the sump or a canopy?

 

[TomH]

Something like this?

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Titanium Heater Controller (Jalli)
This controller is used with the Jalli titanium heaters. Features include: heating indicator, temperature control, power indicator, temperature sensor & suction cup, 3-prong controller power plug, heater power receptacle (accepts 3-prong plug from the heater). Control range: 70-95 degrees. Maximum wattage: 1,000 watts. Operating voltage: 110v-120v, 50-60 hz. Electrical cord: 7' 10" in length.

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(It appears that you can actually use it with any 110v appliance, not just the heater, but I'm not certain of that)

 

[Robin Goodfellow]

hi.
I just put regular temperature probe (thermoresistor with lead solder and copper wire) in a plastic cap, and silicone the whole thing so that the water can't get the wire and metal part. In reef tank for about 3 years, and no visible corrosion (plastic cap and silicone is transparent). Let me know if you want a pic.

 

[wombat1]

I think that I would like a pic.

 

[MarkO1]

I'm looking for a thermostat that would trigger power to the fan in my canopy when a certain temperature has been reached. I think this could be accomplished with a bi-metal strip. This may make submersible not an option.
Robin Good, a photo would help.
Thanks in advance.
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1970 recession

 

[Robin Goodfellow]

hi.
The following is a pic of two thermoresistors ("temp sensors) "potted" in silicon. As I said before, I see no visible corrosion after several years of usage.

For certain control application, you may have to order appropriate sensor from the manufacturer. Some models, such as those offered by Johnson Control and Honeywell, I think, have specific wet well for the sensors. Most stainless steel sensor WILL rust in saltwater, so either use SS316 or titanium. Or if you are not too picky about response time, use plastic shell with silicon like me.