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Extech Dual Laser Infrared Thermometer with Color Alert (42509)

Measures up to 950F (510C). Dual lasers converge at 12" and ensure accurate targeting and temperature measurement. The Color Alert feature indicates when High or Low set points are exceeded.
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$89.99

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Extech Dual Laser Infrared Thermometer with Color Alert (42509)

42509_SFeatures:

  • Displays non-contact temperature readings up to 950F (510C).
  • Fast and accurate measurements at 12" where the two lasers converge with 12:1 field of view
  • Measures up to 950°F (510°C)
  • Automatic blue backlit dual LCD display
  • Programmable alarm makes red backlit display flash when reading exceeds High or Low set points
  • Exclusive 150 millisecond instantaneous response for capturing spikes in temperature
  • Max mode captures and holds rapidly changing temperatures
  • 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
  • Double molded housing
  • Complete with case and 9V battery

The Extech Model 42509 IR Thermometer with Color measures and displays non-contact temperature readings up to 950F (510C). Dual laser pointers ensure accurate targeting and temperature measurement. The Color Alert feature indicates when High or Low set points are exceeded. 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 dual laser pointers are designed to indicate the 12” distance when the laser points are 1” apart. The spot size at this distance is a 1” diameter. This is the recommended distance for most measurements.

Measuring Leaf Temperature

42509_ColorInfrared 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.

Specifications

  • Laser Convergence Distance 12" (30.5cm)
  • Range -4 to 950°F (-20 to 510°C)
  • Repeatability ±0.5% or 1.8°F/1°C
  • Basic Accuracy ±(1% of rdg + 2°F/1°C)
  • Max resolution 0.1°F/°C
  • Emissivity 0.10 to 1.00 Adjustable
  • Field of View (Distance to Target) 12:1
  • Dimensions 5.7x4x1.6" (146x104x43mm)

Unit ship weight: 2Lbs





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