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Enabling better global research outcomes in soil, plant & environmental monitoring.

EVEREST 6110L AGRI-THERM III

The AGRI-THERM III™ is so named because it is the Third Generation of handheld infrared thermometers designed by Everest Interscience for making surface temperature measurements in the natural environment.

The AGRI-THERM III Model 6110L has a diverging field of view. It is field-focusable from 4° to 20°. The output for the Model 6110L is Analogue Millivolt at 10 mV/°C.

AGRI-THERM III™ (6110L)

Temperature Measurement

Scale Range: -40°C to 100°C
Resolution: 0.1°C
Accuracy: ±0.25°C from 0°C to 50°C & ±0.5°C from -40°C to 0°C or 50°C to 100°C
Repeatability: ±0.1°C
Temperature: All functions in °C, corresponding to voltage output
Noise Effective Temperature: <0.1°C
Temperature Measurement Modes: Surface temperature, ambient dry bulb temperature and temperature differential (U.S. Patent no. 4,301,682)

Optical Considerations

Optical Configuration: Robust, aerospace-quality, double-coated zinc selenide optics
per military specification MIL-C-13508
Spectral Pass Band: 8 < Wavelengths < 14 Microns
Sighting: TTL/SLR Intra-Optical light sighting: visible light
Illuminates field of view (PATENT NO. 4,494,881)
Illumination Source: Light Emitting Diode- Safe- No lasers!
Field of View: Variable from 4° to 20° with Vario-Zooom™ Field-Variable-Focus (Patent no. 7,355,178)
Display: Numeric Liquid Crystal Display on rear panel

Operating Conditions

Operating Environment: -20°C to 65°C or +14°F to 150°F, up to 99% relative humidity, non-condensing
Storage Temperature: Same as operating environment temperature

Electrical Interface

Power Sources: Rechargeable nickel metal hydride batteries
10 hours continuous use on full battery charge
Output Signal: Analogue Millivolt (-400mV to 1000mV at 10.0mV/°C)

General

Response Time: <1 second
Emissivity Compensation: Settable from 10% to 99% on rear panel
Sky Radiation Detection/Correction Standard Sky-Spy™ system for detection & correction of unwanted sky reflection (U.S. patent no. 4,420,265)
Operating Distance: 2cm to infinity
Embedded Data Logger (Optional): Custom made data logger; easy USB connection; Microsoft Excel format
Warranty: One-Year limited warranty on parts and labour

These particular instruments have the same features that the AGRI-THERM II has plus another that make them the ultimate infrared thermometers for measuring temperatures outdoors. This is the capability to read the Surface Temperature, the Ambient Air Temperature (the Dry Bulb Temperature) and the Differential of these two readings.

The temperature range and the accuracy are the same as noted for the AGRI-THERM II™, for both the Model 6110L and the Model 6210L.
The AGRI-THERM III™ (Model 6110L) has a diverging field of view. It is field-focusable from four degrees to twenty degrees. The output for the Model 6110L is Analog Millivolt at 10mV/ºC.

One standard feature on this instrument is the SKY-SPY™ System. To increase the accuracy of the AGRI-THERM II™, the SKY-SPY™ has been added to the original sensor. Errors from 1-2ºC can result when an infrared sensor is calibrated indoors and then used outdoors. This is because the cold sky reflects off of the target’s surface and into the temperature sensor. This reflection combines with the target’s radiation signal, causing an error. This error is dynamic and unpredictable and can vary from 0.5ºC to 2.0ºC in a matter of minutes. For this reason, the SKY-SPY™ is vital to the accuracy of this particular sensor.

The AGRI-THERM II™ also incorporates the TTL/SLR Intra-Optical Light Sighting System wherein a light goes directly through the infrared optics, illuminating the exact target area being measured. The sighting of the actual target is not possible with conventional infrared thermometers. Since the infrared signal beam is not visible to the human eye, this light sighting feature is necessary to be sure that the target is being measured and not the target and the background. All infrared thermometers average the temperature of the first thing they see. With the TTL/SLR Intra-Optical Light Sighting, it is possible to know exactly what the thermometer is seeing.

The VARIO-ZOOOM™ Field-Variable-Focus System allows the operator to change the field of view of the infrared thermometer in the lab or field. This is accomplished by simply pulling the optics out or pushing them in. The TTL/SLR Intra-Optical Light Sighting will indicate when the instrument is in focus when the target spot size is clear. The optics will remain where they are focused as there are two rubber gaskets constraining their movement.