the thermometer seems well finished and quickly measure the temperature, however the result is false ambient air is to -3 ° approx. with respect to a reference thermometer, liquids are to -4 / -5 ° relative to a professional thermometer the solids are at -4 ° approx. In short, if the measure is necessary, moreover laser, so it is that we need clarification: either it is out of calibration, or it is just wrong
