I recently received a Herpstat and decided to test it out on a spare sheet of Flexwatt.

Here's the problem:


Untitled by jason.granger, on Flickr

The tempgun is 4-6 degrees off of what the thermostat is set to! Before you ask how I'm measuring the temps, here's how it's set up:


Untitled by jason.granger, on Flickr

As you can see, I'm measuring the temperature of the Flexwatt directly since it's not attached to a cage. Any ideas what's going on here? Is that tempgun just inaccurate?