Actually chrid......herp 1 and ve200 are both proportional. The ve200 can be set as an on/off and I am not familiar with the herp to know if that is also an option.
ANY on/off is going to have about a 5 degree swing as it is usually +/- 2 degrees so if you figure 2 below + set temp+ 2 above.... Thats about 5 degrees. I have several and havent had problems with them but I also trust my IR gun more than the sticker with numbers on it.
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