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LED Display:
Red: Measuring Temperature; Blue: Setting Temperature
LL: Means the sensor is open
HH: Indicates that the temperature exceeds the measurement range of the module
--: Indicates that the module is under high temperature protection
Programmable Thermostat Introductions (Code, Explain, Setting range, Factory setting):
P0, Heating/Cooling, H/C, C
P1, Return difference, 0.1-30, 2
P2, Set limit maximum, +110, 110
P3, Set limit minimun, -50, -50
P4, Temperature correction, -15 - +15, 0
P5, Delay start, 0-10, 0
P6, High temperature alarm, -50 - +110, OFF
P7, Celsius/Fahrenheit, CS/FH, CS
P8, Factory reset, ON-OFF, OFF
Specifications:
Operating voltage: DC 12V 200mA
Power consumption: ≤ 35 mA (static), ≤ 65 mA (relay close)
Temperature sensor type: 10K 0.5% NTC
Compatible load: 5A/ 15A 220VAC, 20A 14VDC
Measurement range: -50 to 110 Celsius (-58 to 230 F)
Elaboration precision: +/-0.1 Celsius
Control precision: 0.1 Celsius
Backlash precision: 0.1 Celsius
Refresh rate: 0.5 s
High temperature protection: 0 to 110 degrees Celsius (32 degrees Fahrenheit - 230 degrees Fahrenheit)
Module size: 48 x 29 x 32 mm/ 1.89 x 1.14 x 1.26 inch
Package includes:
3 x Temperature monitoring controllers
Wylie Wiggins
2025-08-16 10:12:18
Nice little units with a higher load potential than the 10 amp W1209s I have wired for low temperature thermal protection of a Lifepo4 battery with RV plumbing elbow heaters.These circuit boards tested well through multiple cycles with the electrical load of a small pump and two PC fans. This is a lower amperage application at only a few amps total, I'm not pushing these anywhere near 20 amps!Good to go for light loads.
Dustin P.
2025-08-15 17:51:29
This thing works great. I have it running two computer case fans that I can set a nice temperature to turn on and off. The temperature reading was off by a couple of degrees but it gives you the option to calibrate it.
BgSigns
2025-07-13 17:33:28
Impossible to program. Instructions aren’t even chinglish. Their scribble. Don’t buy.
William R. Reynolds
2025-05-10 16:11:09
Touchy, but works good. I see conflicting relay contacts max. Output. The online description says 200ma. max. (K1,K2) contact current. It turns out that is the compliance current drawn by the device. The paper instructions say 5A DC contact current (this sounds more like it). The instructions are a little confusing, but okay except: the 12vdc configuration shows the relay contact switching the ground to the load. This isn't the accepted convention. You should switch the 12vdc positive side, not the negative side. It's considered safer. I just jumpered the K1 relay terminal to the 12v positive line. K2 connected to the positive end of the load. For the price, it's great. It has normal Temp. Controller parameters. Surprisingly functional.
WW
2025-04-24 12:43:15
My shed gets too hot. This controls the 12 volt vent fan powered by a solar charged battery just fine.The fan is a booster fan for a car radiator.
FishyBiz
2025-02-28 12:10:52
These things are cheap work. I use them for a refrigeration and freezer and temperature sensing on my water maker on my sailboat work well.
Wifeandmama
2025-01-20 16:54:02
like other reviews takes a few mins to understand installation instructions but after that works like a charm
Thomas Perkins
2024-12-06 16:11:58
I'm not deep into electronics but with a little help from my CB buddies on Facebook it was a breeze.It should have been a slam dunk but I haven't been into gadgets for a long time and so once I double checked what I was doing my Igloo cooler works more efficiently.Saving power depending on surrounding temperatures and saving the life of the motor as well.If ya wanna explore the things ya can do this is the thermostat ya need.Yes instructions are a bit vague but who am I to argue I'm just a tinkerer.
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