Temperature Probe Testing - Need Guidance

[HermanTX]

I have purchased a new air probe with a longer wire to move my air probe away from the equipment pad.
I tested the probe with an ohm meter and recorded 13,700 which equates to 64 deg F however my digital thermometer next to the probe recorded 68 deg F. Is this the margin of error I need to live with? The probe has not been installed yet. It is sitting on my workbench for testing.

I am referring to the chart in this link

Temperature Sensors - Further Reading

www.troublefreepool.com

 

[ajw22]

How do you know your digital thermometer is correct?

Does your digital thermometer have a probe? Put them both in a glass of water.

 

[cwswifty]

Put them both in a glass of water.

Put them both in a glass of ice water. That way you know the correct answer.

Edit: You could also put them in boiling water to get a 2 point check. This would tell you if you have an offset problem or a scaling problem or maybe both.