cheep & quick digital thermostat for heating or cooling

Al B. Fuct

once had a dog named
Uhm......sorry?
Did you comment without reading the whole thread? The points you made exist in just the few posts preceding the one you wrote. Scroll back.

I see they say that this tstat can be used to control 'AC or DC' fans but I'd be more comfortable if they gave a voltage rating to assure it's OK to use this with line voltage devices.

but i'm going to theorize that it might mean like set the week days to be X*f and the weekends Y*f,
I can't see any need for a tstat in a grow op to do anything other than control temp to a certain setpoint. Your plants don't care about weekends. ;)
 

Al B. Fuct

once had a dog named
so nothing wrong with using a non-dig thermostat? ok, thanks for the help +rep
Sure, any tstat with NO & NC contacts will do. This thread started out being about a particular thermostat which happens to be digital but also can switch a line voltage, for either a heater or a cooling fan. You don't necessarily need a digital tstat, just one with both NO & NC contacts.

Be careful when buying- some tstats are designed only for heating appliances. This means that their relay contacts close when the temp is BELOW the setpoint, to power up a heater. Whatever tstat you use needs to be able to close a pair of contacts when the temp rises ABOVE the setpoint. The Jaycar QT7200 will do both.
 

SomeGuy

Well-Known Member
I see they say that this tstat can be used to control 'AC or DC' fans but I'd be more comfortable if they gave a voltage rating to assure it's OK to use this with line voltage devices.
Alright, my lazy butt just pulled out the spec sheet on the thermostat:

Switch: SP-DT --Single Pole Double Throw

Range: 40-140 dg F 4-40 dg C

Differential: 2.5dg F / 1.4dg C

Sensing element: Spiral Stainless Steel

Volts A/C 50/60hz 120v 240v
Full load amps: 12a 10a
Locked Rotor amps 48a 36a
Full Load Amps (resistive): 16a 16a
 

Al B. Fuct

once had a dog named
Yep, that's the right stuff. The SPDT switch allows control of either a heating or cooling appliance. The contacts are rated to switch 2400W, so you could conceivably control an aircon unit with it.
 

SomeGuy

Well-Known Member
Yep, that's the right stuff. The SPDT switch allows control of either a heating or cooling appliance. The contacts are rated to switch 2400W, so you could conceivably control an aircon unit with it.
Yeah, not bad for 45$ shipped :) The catch is you have to know how to wire the thing... but thats really not difficult..LOL. It does a great job.
 
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