Thermometer calibration

[Gast]

Hello,

As the cold season approaches I start to feel that some reason report the same temperature even though they feel much different.
I have in some rooms the 1-wire sensor while in others the temperature/humidity sensor.

I know I can calibrate these but I wonder what kind of device to use for calibration. I don't have any air thermometer around so I am happy to get suggestions for a device to do this properly.
If anyone has gone through this before please let me know how you performed the calibration.

Kind regards,

Paulo

[jens.kaufmann]

Hi Paulo,

I have a similar situation here: some 1-wire and some thermo sensors with analogue output. For calibration I use a cheap refridgerator thermometer from amazon:

https://www.amazon.de/gp/product/B004A0UPTW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

This part seems quite precise and has a quick response time.
With this thermometer I was able to compensate some self heating of the analogue thermometers and after calibration I have the same temperature reading on all loxone connected devices in my house.

best regards,
Jens

[Gast]

Hi Paulo,

I have a similar situation here: some 1-wire and some thermo sensors with analogue output. For calibration I use a cheap refridgerator thermometer from amazon:

https://www.amazon.de/gp/product/B004A0UPTW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

This part seems quite precise and has a quick response time.
With this thermometer I was able to compensate some self heating of the analogue thermometers and after calibration I have the same temperature reading on all loxone connected devices in my house.

best regards,
Jens

That's perfect. I have just ordered the thermometer. Thanks Jens.

[Gast]

Just to update on the situation. I am now calibrating the rooms one by one and I am surprised but how off some temperature sensors are. Sometimes up to 2C difference.

[jens.kaufmann]

I found out, especially the expensive loxone sensors have a deviation of 1,5 to 1,9 degrees.

http://shop.loxone.com/dede/temperaturfuehler.html

http://shop.loxone.com/dede/temperatur-feuchtefuehler.html

Next time I'd rather use the cheap 1-wire sensors for temperature measurement, they seem to be more accurate.

[Gast]

I found out, especially the expensive loxone sensors have a deviation of 1,5 to 1,9 degrees.

http://shop.loxone.com/dede/temperaturfuehler.html

http://shop.loxone.com/dede/temperatur-feuchtefuehler.html

Next time I'd rather use the cheap 1-wire sensors for temperature measurement, they seem to be more accurate.

Interesting. I am measuring the same deviations. Up to 1.9 degrees. Lowest deviation is currently 1.6 degrees and still have a few rooms to go. Thanks.