A thermometer is a device that measures temperature or a temperature gradient.
A thermometer has two important elements: a temperature sensor in which some change occurs with a change in temperature; and some means of converting this change into a numerical value.

Fluke 62 MAX+ Handheld Infrared Laser Thermometer
$269.00 -7%
IP54 Rated IR THERMOMETER, 30 to 650 deg C (-22 to +1202 deg F), 12:1 ratio

Ergonomically designed: Completely redesigned for a more natural hand fit.
Small and lightweight; clips to your tool belt or belt loop or easily fits into your tool box.
Dust and water-resistant: IP54 rated for dust and water resistance.
Rugged: 3-meter (9.8-foot) drop tested.
Fluke 63 Mini Infrared Thermometer Gun
$599.00 -8%
Last items in stock
Key features of Fluke 63 Mini Infrared Thermometer
Rugged mini IR thermometer with 12:1 distance to spot ratio for non-contact temperature measurements
Measures temperature from -32 to 535°C (-25 to 999°F)
Features high-resolution optics for measuring in hard-to-reach situations
Delivers high accuracy (1%) and repeatability (0.5%)
Shows MAX temperature on backlit display
Offers laser targeting for precise measurements