cheep & quick digital thermostat for heating or cooling

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. ;)
 
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.
 
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
 
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.
 
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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