Extech 1200F Compact Laser Infrared Thermometer (42510A)

In stock

Measures up to 1200F (650C). With a field of view of 12:1 and laser for precise target temperature measurement. This compact design is portable and easy to use. Versatile and accurat design.

Extech Compact Laser Infrared Thermometer 1200F (42510A)


  • Displays non-contact temperature readings up to 1200F (650C).
  • Fast and accurate measurements with 12:1 field of view
  • Large LCD display with bright backlight
  • MAX/MIN feature displays highest and lowest values
  • Built-in laser pointer improves aim and measurement accuracy
  • Adjustable emissivity increases measurement accuracy for different surfaces
  • Adjustable High/Low set points with audible alarm alerts user when temperature exceeds the programmed set points
  • High resolution of 0.1º up to 199.9º
  • Complete with 9V battery and carrying case
  • Automatic Data Hold when the trigger is released
  • Auto Power Off

The Extech Model 42510A IR Thermometer measures and displays non-contact temperature readings up to 1200F (650C). The laser pointer ensures accurate targeting and temperature measurement. The adjustable high/low set points with an audible alarm will alert the user when the temperature exceeds the programmed set points. The adjustable emissivity feature allows the IR thermometer to measure the temperature of virtually any surface. Proper use and care of this meter will provide years of reliable service.

The meter has a distance to target ratio of 12:1. The spot size at 12 inches has a 1” diameter. The closer to the meter the smaller spot size for measurement you will have. This meter has an automatic data hold as well as an automatic power off feature. Complete with 9V battery and carrying case.

Measuring Leaf Temperature

Infrared Thermometers are useful tools for so many applications where the surface temperature of something is important. One of the most important uses of an IR Thermometer in agriculture is to measure the temperature of your leaves. Measuring the difference between leaf temperature and ambient air temperature has been discovered to be one of the best indications of plant stress from heat, light and especially lack of water. High temperature differentials between leaf temperature and ambient air temperature has been found to lead to reduced yields so monitoring this is extremely important.

Distance : Spot Ratio

The infrared thermometers have a ratio such as 12:1  which is the distance to spot ratio. This means that the beam diameter cast on the leaf will be 1/12th of the distance from the sensor to the object. For example if you stood at 12 inches away from the leaf, the beam of light cast on the leaf would measure 1 inch in diameter, in other words the closer you are to the leaf the more concentrated the area will be that you measure. The higher the distance:spot ratio, the better quality the thermometer and you can also take accurate measurements from further away from the target.


  • IR Range -58 to 1200°F (-50 to 650°C)
  • Basic Accuracy ±(1% of rdg + 2˚F/1˚C)
  • Max resolution 0.1°F/°C; 1°F/°C
  • Power 9V Battery
  • Emissivity 0.10 to 1.00 Adjustable
  • Field of View (Distance to Target) 12:1
  • Dimensions 3.2x1.6x6.3" (82x42x160mm)
  • 3 Year Warranty

Unit ship weight: 2 Lbs

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