Extech Pocket Laser Infrared Thermometer 581F (IR201)

Features:

• Displays non-contact temperature readings up to 500F (270C).
• Fast and accurate measurements with 6:1 field of view
• Large LCD display
• Data Hold and Max Hold
• Built-in laser pointer improves aim and measurement accuracy
• Fixed emissivity of 0.95 covers 90% of surface applications
• Complete with 2 AAA batteries and pouch case
• Auto Power Off

The Extech Model IR201 IR Thermometer measures and displays non-contact temperature readings up to 518F (270C). Its compact and easy to carry design is great for temperature testing around the home, farm or lab. The laser pointer ensures accurate targeting and temperature measurement.  The 0.95 emisiivity ensures that you can accurately measure 90% of surface applications. Proper use and care of this meter will provide years of reliable service.

The meter has a distance to target ratio of 6:1. The spot size at 6 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 2 AAA batteries and pouch 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 6:1  which is the distance to spot ratio. This means that the beam diameter cast on the leaf will be 1/6th of the distance from the sensor to the object. For example if you stood at 6 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

• IR Range -58 to 518°F (-50 to 270°C)

• Basic Accuracy ±2.5% of reading + 3°F/2°C

• Max resolution 1°F/°C
• Power 9V Battery

• Emissivity 0.95 Fixed
• Field of View (Distance to Target) 16:1
• Dimensions 3.7x2x1" (94x55x25mm)
• 1 Year Warranty

Unit ship weight: 2 Lbs