Temperature Sensor

koiesmith · Newbie Joined: 10 Oct 2008 Posts: 3

I'm running a bunch of PVC underground at my house for a cooling system that i intend to pass air through. I wanted to put some temperature sensors inside of the PVC pipe to monitor the temperature of the air as it travels down the pipes.

Any suggestions on a sensor and how to gather the data from it?

koiesmith · Newbie Joined: 10 Oct 2008 Posts: 3

To add some additional information....

I assume i'm looking for a temperature sensor like this.
http://pdfserv.maxim-ic.com/en/ds/DS1822.pdf

I also really like the LCD in this project and would probably want to bring my temperature readings back to something like this.
http://alan-parekh.com/projects/fish-tank-lights-and-temperature-sensor/

These will be installed down several hundred feet on PVC pipe buried about 6 ft below ground. Any help will be appreciated. I just got into messing with electronics. Picked up my first digital multimeter the other day. Thanks in advance.

Tekwiz · Posted: Tue Oct 21, 2008 4:06 pm Post subject:

Those temp sensing ICs appear ideal for your purpose. The only caveat is that they require a computer or microcontroller to be able to use them, & this may be beyond a beginner's skill level. Depending on the final use you have in mind for the temp readings, you might look into using a dedicated computer & software to manage the whole system.
Another option to explore is using standard thermistors. Thermistors are simply temperature dependant resistors, resistors whose value changes with temperature. They can be used in a very wide variety of circuits, & offer top versatility for this reason. They are also very inexpensive. Smile

DoctorLes · Semi Newbie Joined: 30 Aug 2009 Posts: 5

BTW, If you are planning to have the pipes underground dissipate heat I suggest you use galvanized pipe because it will do much better at that and not give off toxic fumes. But if you are looking for the PVC to be an insulator stick with PVC.
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koiesmith · Newbie Joined: 10 Oct 2008 Posts: 3

I still havent managed to get this project going... has anyone else worked on a project like this before?

Turd · Posted: Wed Dec 30, 2009 5:17 pm Post subject:

Look at the 'readtemp" command on page 155 of the PICAXE manual #2 Smile

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