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


The 6000L Vario-Therm is a revolutionary fully self contained low temperature infrared temperature sensor that is extremely small.

The Vario-Therm measures temperatures from -40°C to 100°C with ± 0.5° of accuracy.

The TTL/SLR Intra-Optical Light Sighting provides a visible light emitting diode that illuminates the exact target area being measured. The pattern of the detector in the infrared thermometer is projected on the target, providing a three dimensional reading of the target.

The field of view is variable from 2mm to 4 degrees using the new Vario-Zooom focusing feature.

The standard output for the Vario-Therm is Analogue Milivolt. The digital output is PWM format. The optional outputs are 4-20 mA, 0-5 volts and Type J or Type K Thermocouple.

The response time of the instruments is less than 1 second. The instruments dimensions are 22.2mm diameter and 68mm in length.


Temperature Measurement

Scale Range: -40°C to 100°C
Resolution: 0.1°C
Accuracy: ±0.5°C
Repeatability: ±0.1°C
Temperature: All functions in °C
Noise Effective Temperature: ±0.2°C

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 (U.S. patent no. 4,494,881)
Focus: Field focusable, converging optics from 2mm to 4° using VARIO-ZOOOM™ (U.S. patent no. 7,355,187)

Operating Conditions

Operating Environment: -10°C to 70°C, up to 99% relative humidity, non-condensing
Storage Temperature: Same as operating environment temperature

Electrical Interface

Power Requirements: 5V to 26V DC (Current Draw: 1.0A); 110 VAC 60Hz
Output Signal: Standard: Analogue: Millivolt (10mV/°C)
Digital: PWM (Pulse Width Modulation) format
Optional: 4-20 mA; 0-5 volt and Type J or Type K thermocouple


Response Time: 0.10 Second
Emissivity Compensation: Preset to 0.97 (default)/Customer’s specification
Operating Distance: 2cm to 300 meters
Dimensions: 7/8 inch diameter by 2-2/3 inch length
Warranty: One-year limited warranty on parts and labour