Extech Differential Thermometer Datalogger and IR (Plant Stress) (HD200)
 Features:
- Automatically stores up to 18,000 readings and takes differential temperature readings with dual type K thermocouple probes plus non contact surface temperature measurement using IR thermometer probe
- Compare ambient air temperature and IR temperature to form plant stress readings
- IR Probe temperature range -22 to 1022F (-30 to 550C)
- Fast and accurate measurements with high 8:1 field of view with the IR thermometer probe with a targeting laser pointer
- Display (T1, T2, T3(IR)) or (T1-T2) or (T1-T3(IR)) or (T2-T3(IR))
- MAX/MIN/AVG and Data Hold
- Built-in laser pointer improves aim and measurement accuracy in probe
- USB port includes PC Software
- Complete with two Type K bead wire temperature probes (-22 to 572F/ -30 to 300C), IR probe, Built-in stand, Windows compatible software, USB cable, Hard carrying case and 9V battery
 This meter automatically stores up to 18,000 readings and takes differential temperature readings with dual type K thermocouple probes plus non-contact surface temperature measurement using IR thermometer probe. Easily compare the ambient air temperature taken by the two type K probes to the temperature given by the IR thermometer of things such as leaves to determine plant stress. Upload your temperature information onto your PC to track changes and discover trends.
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 8:1 which is the distance to spot ratio. This means that the beam diameter cast on the leaf will be 1/8th of the distance from the sensor to the object. For example if you stood at 8 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
Unit ship weight: 2 Lbs
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