temperature sensors

[dwalt]

I've been stockpiling parts to support my HAI clients. The one thing I'm running short of is temperature sensors.
I use them in an outdoor snow melt system and after 10-20 years outside they are failing. Lots of corrosion on the whole circuit board.
Looks like I'm going to have to start repairing my bad ones. Does anyone have any dead sensors I could buy? I don't care if they are standard or extended range or with Humidity. just need some spare parts. A number of components on the temp sensor board are not available anymore.
Thanks,
dwalt

 

[ano]

This one might be worth creating a redesign for. They are quite simple. They do nothing more than to take a temperature range (regular or extended) and convert that to a 0-5v signal. The circuit runs on 12v. I'll search, but there has to be other circuits out there that do that. A micro-controller at the most, but probably even simplier. I'll look.

 

[dwalt]

I started going thru my broken temp sensors. The corrosion comes off easily with vinegar and water rinse.
I need to replace some caps (mechanical damage). I believe they are Nichicon 100uf 25 volt smd caps.
The only other code on the cap looks to be G3P, G4P, PTP and a 0 with a slash thru it then 2P. All caps are the same physical size.
All the caps on the Nichicon site start with U. I could use some advice on what a proper replacement would be.

 

[dwalt]

some pics of the caps

 

[dwalt]

Is there a chance the Elk M1ZTS might work? Its also a 3 wire device that runs on 12 volts. Temperature range is -50 to +140 which is slightly greater than the HAI.

 

[pete_c]

Not much help...

J

Thread 'HAI ELK Temperature Sensor Compatibility'

Feb 21, 2016

Hi all,
 
I need to monitor outdoor temperatures beyond 120 degrees.  I don't know of an HAI sensor that goes beyond 120.  I gave googled and found an Elk M1ZTS that goes to 140 and the M1TS that seems to go to 150 but doubt ELK is compatible with the HAI.
Would appreciate any thoughts on whether the ELK will work or any other products that might work.
 
thnks Folks

• jimmyb

Thinking user @tigers was trying to build one a while back..

T

Thread 'Humidity sensor HAI compatible'

Oct 13, 2012

I was wondering if there's a humidity sensor compatible wigh HAI. I'm looking for a humidity only sensor to put in wall sockets, the omnistat are too much for my use.
I'd like to be able to read the HR% and set the thresold via Omni to command the vent in a windowless room and I don't want people to mess with the settings.
Now I'm doing the same thing with temperature sensor in every room that command heating valves and pumps, so even a temperature/humidity sensor will do (I'd replace the existing temperature only).

Thanks for any help you'll provide

• tigers
• Replies: 19
• Forum: Leviton/HAI OmniPro Products

 

[ano]

I can't speak for ELK, but the HAI one is very simple, the sensor outputs a voltage relative to the temp or humidity. The "extended" temp sensor does the same with a wider temp range. I think it will be hard to find off-the shelf parts to replicate this, because if the temp range of the sensor is different, the temp will read wrong. ELK may be similar, or may send a digital signal, I don't know.

Now the solution, should not be too difficult. An ESP32 should be programable for this simple function.