2pcs W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110℃ Electronic Temperature Temp Control Module Switch with 10A One-Channel Relay and Waterproof, Without

Need increase the pin size to connect

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.

funzionano alla grande

Control de temperatura de un Inversor Vcc/Vac.

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.

Bought these (only in fact needed one) to control solar powered ventilation fans in my greenhouse. Can be configured to operate in cooling (on when set temperature exceeded) or heating (on when below set temperature). There's a couple of degrees hysteresis so it won't oscillate too much. The LEDs show the current temperature and it seems fairly accurate. The temperature probe supplied has a reasonably long lead and is potted into a metal cap, making it waterproof (the board itself will of course need protecting in a box).Configuration is simple, albeit a bit tricky to figure at the start I found. It essentially comes down to up and down buttons to set the trigger temperature. The settings are non-volatile so survive power loss.Was a bit concerned about the current drain given I'm using it in a solar/battery environment. However, even though it has pretty bright LEDs they have minimal drain on my small Li-Ion pack (not enough to discharge it over night anyway).