This heater is super accurate, and will hold a temp within a degree (depending on the environment and air movement)The heater includes full instructions to operate it and make PID controller changes. You can leave this heater on for months without any off time. The pad comes with thermal tape seen in the images above. This will be used with a thermal laser gun to shoot the temps. If you have a thermocouple that would be the best method to check and verify temps.