Brinsea Spot Check Digital Thermometer for Egg Incubator USF135C
Product Review (submitted on June 25, 2014):
I have used the Brinsea Spot Check for over 10 years, own several of them and they are by far the most accurate and dependable digital on the market, PERIOD! You can also send them to Brinsea for calibration and they supply a certificate with every cert. Nobody else in the industry does that that I'm aware of, this is a GREAT product.