AVANTEK Infrared Thermometer.  Temperature Range from -58°F to 1562°F.  Non-contact Dual Laser Digital Thermometer.  Displays in deg C or deg F.  Easy to read, backlit LCD display.

Since this is no touch, you can check the temp of yeast washing and yeast rehydration water and your starter wort without the risk of infection.  I find mine particularly useful for rehydrating yeast.

Infrared thermometers should not be considered a direct replacement for a conventional thermometer.  A quality IR thermometer will give you a close approximation of surface temperatures.  Note that steam seems to throw off readings.  Uses include: Contained yeast rehydration water, chilled wort or starter temperature, kegerator, fermenter or fermentation area and beer tasting samples.  If you’re looking for a great conventional thermometer consider Thermapen ONE – Hands on Review

Update: Since this post was published the price, availability or promotion has changed.  Check the product page for current description, price and availability.  Also: Today’s Deals on Amazon

Dual Laser Infrared Thermometer AVANTEK -58 ºF~1562 ºF (-50 ºC~850 ºC), Non-Contact Digital IR Temperature Gun, Emissivity Adjustable & MAX/MIN/DIF/AVG Modes with Temperature Alarm