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Model: W1209 With Case
Dimensions: 48.5 * 40mm
Temperature Control mode: ON / OFF
Temperature Range :-50 - 110 degree centigrade
Resolution: When temperature is 0.1 degree, the resolution is -9.9~99.9, other temperature segment is 1 degree.
Control Accuracy: 0.1 degree
Hysteresis Accuracy: 0.1 degree
Refresh Rate: 0.5s
High Temperature Protection 0 - 110 degree centigrade
Supply Voltage: DC 12V
Static Current: Less than 35MA, attract current less than 65MA
Output Voltage: DC 12V
Output Power: 20A relay
Measurement Input: NTC (10K 0.5%) Waterproof Sensor
Environmental Requirements: -10 - 60 degree centigrade; Humidity 20% - 85%
Instructions for use:
Connect the power supply and equipment, the measuring temperature is displayed,
press the "SET" button, press " + or - " to set the desired temperature (long press " + or - " to quickly increase or decrease),
press "SET" to confirm the setting and return, controller automatically performs the relay ON/OFF.
the thermostat output is 10A relay, meet a variety of high-power loads. LED Indicator: LED off indicates the relay off; Lighting, indicates the relay is closed.
Digital LED Tubes: "LL" indicates sensor open, "HH" indicates overrange, the relay will be forcibly disconnected; "---" indicates high temperature alarm
Long press the "SET" button to enter the main menu settings,
press " + or - " to switching between P0-P6,
then long press "SET" or 10 seconds without keystrokes to confirm the setting and return.
Package Included:
2 * W1209 12V DC Digital Temperature Controller Board With Case
Steve
2025-08-16 15:30:06
I have a home made cabinet for my CNC router. There is a compartment for the computer, but it doesn't have much air circulation. The other day I noticed the temperature was quite high in the cabinet and possibly a contributing factor for a recent hard drive failure.I wanted to add a fan to circulate air, but since the computer goes in to sleep mode and doesn't generate much heat when it's not being used, I didn't want something that ran all the time. With this gizmo and a 12V fan, I was able to set it up so the fan only runs when the temperature in the cabinet exceeds a certain amount. So far it seems to be working great. I have it set to come on at 32C and go off at 30C, and it's been been right in that range each time I've noticed the fan running.Set up was easy. I already had a 12V supply available in the cabinet, so all I had to do was hook up the power, insert the K0 and K1 ports inline with the positive lead of the 12V going to the fan, and drop the sensor in the cabinet. As I recall the default settings were what I needed, except maybe changing the temperature range.I opted for the case and that was worth the extra 60 cents. I could have laser cut my own, but it probably would have cost me 60 cents worth of material and certainly more than that in time. The only complaint about the case is that is doesn't provide any holes to mount it to anything unless you want to use the same holes used to hold the case together. No big deal - some double sided foam tape got the job done.Definitely worth it for less than $5 each.
Rick in CA
2025-08-13 14:52:42
I got these as extras, for temperature sensing only. The more I explored them, the more I learned that they are extremely well designed, well thought out and very well built, in spite of their unbelievably low price. Documentation is spotty, with conflicting, confusing and otherwise poor documentation all over the internet. The good thing is that they are widely used, so there is a wealth of information and field experience out there; you just have to sort out the truth from the garbage.I will be using these on a remotely located solar installation, to keep my Li-Ion battery bank from freezing. I plan on doing a lot more testing to make sure these units are up to the task, but so far so good.
Bob
2025-07-07 16:30:11
This worked perfectly for what I needed. I used it to power an auxiliary fan to help keep a grid tie inverter cool. Wiring was a bit confusing but I ended up figuring it out.There are 4 spaces for wires. Going from left to right I wired mine as follows:1. Positive to fan2. Jumper wire to space 3 (I used a prong connector instead.)3. Positive from battery4. Negative from battery and negative from fan.Turns on and off as it should within reasonable accuracy. It is in Celsius so get a conversion printed out.Assembly is required but not difficult. Make sure not to over tighten anything to keep from breaking the terminals. I finger tightened all screws.
DAVID M.
2025-07-03 11:05:18
I have installed a pair of solar charge controllers in my cargo trailer / camper conversion. In the bright sunlight, the controllers get very warm. I know that the controllers are designed to run at these temperatures but I have surplus computer fans just sitting around. I decided to use the controllers to monitor the temperature on the heat sinks of the controllers and turn on cooling fans when they got too hot. They are working like a dream.P.S. the little acrylic housings were a pain to assemble, but for the price, they couldn’t be beat.
Nadean Gutierrez
2025-06-26 17:17:28
bought a pair of these temperature relays because I'm making a cooler and i am using water and submersible pump to pull the heat out. I was getting very hot water and didn't want to ruin the pump, so i added on of the switches and a heat exchanger with a fan on it. Now when i run it without the heat exchanger the temperature switch shuts off my peltier and the water never gets too hot for the pump. With the heat exchanger, the system water has yet to get hot enough to shut down the peltier, but i expect it will when i take this cooler out into the sun and i'm blowing 100 degree F air through instead of 70 degree A/C'd air, and i can be sure i have a safe shut down.Also says they can handle 5 amps for 115v, so i'm going to wire one onto my little 4 amp window a/c unit and see if it saves me electricity and improves temp control over using the 2 crumby knobs....ordered another set, i can think of 10 more uses for these in a minute.*ONLY DISPLAY CELSIUS NOT FAHRENHEIT download the manual, once you know where everything goes, pretty easy.power the unit with 12v and then take a wire powering you item or circuit, send it through the relaym
Erwin Adam
2025-05-11 17:23:51
I used this as a fan controller for my motorcycle. I put the sensor into the radiator fins and dialed in the temperature I wanted to see on the temp gauge. The fan comes on and goes off precisely and crisply compared to the thermo switch that was impossible to find for an older bike. It now starts the fan smartly as opposed to groaning to life with the thermo switch. Just connect the device (+) source power to the running light circuit which comes on when the engine is running. For the fan, provide frame ground, and positive from battery, then through 10A fuse, then through switched relay onboard the device to the fan positive. The programming is simple if you google the device specs on YouTube.
Sheralam
2025-04-24 18:49:57
Good
Nik
2025-03-30 11:59:48
funzionano alla grande
antonio
2025-02-22 19:16:10
Control de temperatura de un Inversor Vcc/Vac.
rbnet
2025-01-29 12:20:55
Les températures mesurées sont inexactes. Les deux thermostats que j'ai reçus ont le même problème : même dans un environnement à température constante et contrôlée, les températures varient en continu de +/- 3°/4°C en quelques secondes. J'ai demandé le retour des produits achetés.
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