Quote Originally Posted by The Serpent Merchant View Post
Temp guns can't measure ambient temperatures, they only measure surface temperatures.

You need a probed thermometer like this:



These cost $12 at Walmart. They measure 2 temperatures and humidity.
That is the exact one I am using. I have it burrowed under the substrate on floor to measure the cable temp . My temp gun is reading a surface temp of 78. What can I use to boost that temp