Temp and Humidity sensor 1-5V output

wayneh

Joined Sep 9, 2010
16,399
For temperature I'd consider a much cheaper approach, a thermometer IC such as the LM35. The specifications for the device address accuracy, and perhaps it's good enough for you.

Humidity is tougher. Most home units use a plastic strip that changes size depending on ambient humidity, tripping a mechanical switch. But there are better approaches. In industrial controlled-environment rooms, I've seen genuine wet bulbs, which of course have to be maintained with fresh water. They're nice because you don't need to calibrate a humidity sensor - just the temperature probe.
 

BSomer

Joined Dec 28, 2011
434
I don't think that remote mounting of the sensor would be a problem. I would use some sort of shielded cable to help eliminate emi or other interference. They also have another sensor that comes without the dip switch and is smaller. That one could go in a really small enclosure.

I only suggest the ones from mikroe because of available library examples and being compatible with your specific mcu without modification.
 

Thread Starter

bowlingo

Joined Jun 29, 2011
162
I don't think that remote mounting of the sensor would be a problem. I would use some sort of shielded cable to help eliminate emi or other interference. They also have another sensor that comes without the dip switch and is smaller. That one could go in a really small enclosure.

I only suggest the ones from mikroe because of available library examples and being compatible with your specific mcu without modification.

Hello,

Where is the one without the dipswitch on the mikroelectronia site?
 

Thread Starter

bowlingo

Joined Jun 29, 2011
162
Have a look at these....

http://www.adafruit.com/category/35_66

I didn't look at the specs on them, but they might work for your needs...

edit:
Did you see that the place you can get the PICPLC board from also sells the humidity/temp sensor...

http://www.mikroe.com/eng/products/view/367/sht1x-board/
I e-mailed mikroelectronica and they are saying this will work...add on board, in adaptable box on long cable...

Any ideas on a 10m screened cable type to use?

Thanks
 

BSomer

Joined Dec 28, 2011
434
Hello,

Where is the one without the dipswitch on the mikroelectronia site?

http://www.mikroe.com/eng/products/view/368/sht1x-proto-board/

As to the cable...

Well it is really up to you how you do it. I think that any shielded cable would do fine as long as it has the correct amount of conductors in it. I think you only need 4. You may be able to get away without the shield and use something like CAT5 networking cable. Build it up with that and test it to see if you are getting any errors in the data. If you have no errorsm you are good to go. :)

Brian
 
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