Micro Temp Digital Infrared Thermometers, Model MT-100
The MicroTemp line of infrared thermometers (pyrometers) allow you to measure the temperature of any surface helping with mechanical diagnostics such as detecting a clogged catalytic converter, misfiring spark plug, weak heating, cooling and air conditioning systems, or even monitoring tire and track temperatures. Professional MotorSports mechanics rely on MicroTemp pyrometers in the pits, but they are also ideal for the automotive do-it-yourselfer.
The ultra compact MT-100 model is about the size of your "pinky" finger and can easily be attached to your key chain. Temp range: -27º F to 230º F (-55º C to 110º C)