How to use W1209 Temperature relay controller and program the thermostat

Thank you for your recent reply.

What is the useful function of the Upper Limit; Lower Limit, and Correction settings ????
These are not explained well anywhere I can find.

Looking to set my Greenhouse 'ON' Trigger for the FAN at 29C, in COLD MODE; I discovered setting the module to 27 C, with the Backlash at its default 2C = 29C.
That has the FAN turn back off at 27 C; which works for me.
(Alternatively, if I set Backlash at 1C, the fan switched on at 28C, and off at 27C).

Upper and Lower Limits seem to be the total range in which the module will do anything; and their use escapes me.
For example, I initially tried using the Upper Limit for trigger temperature, and nothing worked. It seemed to lock out the module.

The use for the 'Correction' mode is also not obvious . .... Correction from what ??

Is there a manual or some other more complete document out there on the operation / use cases for this module ?

I use this relais for a cooling fan (switch on/off) in the housing from my FMD Printer. It works great.

thanks

can i use a different sensor? i need to use temperatures that reach 250°c

What's the max temperature we can set in this?

Where can I buy

It on the load which model is that offs the load please some one help me

Great video thanks!

Very well explained, thanks 🙏🏼🙏🏼🙏🏼🙏🏼

Hi, Im just learning about this existing while taking abt a semester worth of time to do exactly what this does with arduino, so that sucks. I just want to ask, if I supply like 5V to the module, will the device work? I just want to use it for the temperature display and not the relay, so do I have to supply all 12V?

Wow, perfect instructions for this circuit, thanks!

Very well presented! thanks so much for doing this. Much appreciated!

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I don't understand what upper and lower limit does. I set mine to 30 degrees, but when I go over that value nothing happens.

Can you make a video for how to connect this device to an electrical fan using 4 pin reley ?

I would like to use this to keep my garage at -7C but I do NOT want it to cool. I just want it to turn on if it falls below -7.

Thanks, your video helped med, I miss how to set one thing to get my setup to work you showed me

The W3001 controller available for $3 works quite well, this seems to have similar function except it works off 120VAC, and switches the line to the output. Button user interface is different, with a low and high threshold setting used to control turn on and turn off for both heating and cooling, with the hysteresis determined by the delta between the two settings.
Very useful. The cheap version uses thin gauge wire presoldered to the unit instead of screw terminals, so I just changed them to handle higher current. It does come with a housing, so it's more complete and ready to use.
Modified one to get isolated contacts to switch a logic level signal rather than 120V.

So there is no way to set a upper and lower limit? I want to cool to 20, but only turn on when at 23.

Wow, these purpose built electronic devices are getting so cool!

Can I use this gadget for regulating temperatures in poultry brooder ?

How will i do? When i try to do setting in my new XH-W1209, in the P3 it goes upto only 14 (the range is between only 14 to -30). I am confuse as you mention it as 50 to -50.

What are your default setting temperature

I followed the settings as such (for incubator)
However, the thermostat isn't switching off when the temperature goes over 37.7 C (Yes I have set P0 and P1 correctly)
Can you explain what I'm doing wrong

That was a perfect demo of the sensor, thank you.

Good❤

Thank you brother

do I need to fuse this it will be controlling a small fan fir cooling, thanks your awesome

Why is my lower limit maxed at 14

Hello, is it possible to connect a heater(polyamide, for instance) and heat something throughout a certain period of time, with a fixed temperature and then it goes off when the time limit is reached?

Thanks a lot for the video. I got this for a project of mine and I'm trying to find if it's possible to program it so that the + - increments go by 1 degree instead of 0.1. Also, is there a way to program it so that it is on for a certain amount of time? Thanks again!

Very nice explanation

Super 👍 explanation

For chicken eggs p3 how much should keep?

Thank you so much for this material info. I have bought one and I couldn't understand anything from their instructions. This helps a lot.

Share how to connect it as s thermostat for egg incubators.

Can I test the board switch with a car battery? That's the only power supply I have at the moment. Any feedback appreciated and thanks for the video

I connected my W1209 to a 12v lead acid battery with battery and load gnd lead to the gnd terminal. Added a Jumper to +12v and K1 terminals and then load positive to K0 following a dc wiring diagram. When the temperature reached H set point, the fan came on as expected. Once temp reached low set point fan turned off. When I attempted to rerun the test, the W1209 lost power, it appears to have failed. I read that any voltage in excess of 12dcv could compromise the circuit board. I measured 12.8v at the battery. Can the board handle this voltage over nominal. If it can’t what can I do to supply 12 v without any over-voltage?

Does it save my settings or I need to set everytime

Sometimes relay is not getting on though the sensor attain its preset temperature.what is the problem?

Very good and clean information thank you

what is the use of Back slash set if lower limit is there ? vice versa

can you input 220v ac in it?

@robojax Hi,
I would like to implement, in a half closed box, where my NAS and switch are, who heats pretty much, to throw inside a quiet fan like
Noctua 80mm NF-A8 5V PWM with temperature sensor for automatic cooling
Initially I thought to use NAS usb but I think external power supply/adapter is better.
You think this W1209 would be a good fit for my case?

Perfect Video!! Thanks!

Informative

can i connect dc heator to it

Have exactly the same but malfunctioning. It displays C or H if I press the button. If I keep pressing it goes up po1, po2 and so on. It displays no numbers at all. Have left it on but like I said stays on C