Raytek MiniTemp MT 4 Noncontact Thermometer
 

Review Link: http://www.barrys-rigs-n-reviews.com...re/mt4/mt4.htm

Quote: "Keeping an eye on your system’s temperatures is critical, especially if you overclock. There are a wide range of temperature-monitoring displays for PCs that can be mounted in any available 5.25” drive bay; some cases even have pre-installed temperature gauges built in. However, if you don't have either, or you tweak and work on multiple systems or use a test bench setup without a case, the Raytek MiniTemp MT4 Noncontact Thermometer will allow you to take quick, easy and accurate temperature readings of system components in seconds."