Everest Products Directory

Infrared Thermometers (IRT) For Precise Outdoor Temperature Measurements

Three distinct features make Everest Interscience infrared thermometers unique for taking accurate ambient temperature measurements. (See Glossary for explanation). They are:

• SKY-SPY System
• VARIO-ZOOOM Field-Variable-Focus System
• TTL/SLR Intra-Optical Light Sighting System

Additional Products

In addition to the range of low temperature IRT's, Everest also produces high temperature (+1000°C) and other speciality infrared temperature sensors and thermometers. For more information on these products please contact ICT International.

 

Handheld Low Temperature Infra-Red Thermometers

Handheld 6110L

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 Analog Millivolt at 10 mV/°C.

Handheld 6210L

The AGRI-THERM III Model 6210L includes an embedded data acquisition/processing system. The Model 6210L has a field-focusable small spot size focus of 2 mm to a 4° field of view. It includes, a single channel data logger which saves up to 4 million date/time-stamped records for PC download.

Handheld 100L

The basic AGRI-THERM II Model 100L is Everest simplest handheld infrared thermometer for taking temperature measurements outdoors in the natural environment. It is designed to measure only the surface temperature of the target.

Feature Comparisons
	6110L AGRI-Therm III	6210L AGRI-Therm III	100L AGRI-Therm II
	Download handheld comparison brochure
Click the image thumbnail for full size
KEY FEATURES	SKY-SPY VARIO-ZOOOM TTL/SLR Sighting	SKY-SPY VARIO-ZOOOM TTL/SLR Sighting Data logger	SKY-SPY
TEMPERATURE MEASUREMENT
Temperature Range	-40°C to 100°C	-40°C to 100°C	-40°C to 100°C
Resolution	0.1°C	0.1°C	0.1°C
Accuracy	±0.5°C	±0.5°C	±0.5°C
Repeatability	±0.1°C	±0.1°C	±0.1°C
Units	°C	°C	°C
Noise Effective Temperature	Less than 0.1°C	Less than 0.1°C	Less than 0.2°C
Temperature Measurement Modes	Surface Temperature Ambient Dry Bulb Air Temp. Differential Temperature	Surface Temperature Ambient Dry Bulb Air Temp. Differential Temperature	Surface Temperature
OPTICAL CONSIDERATIONS
Spectral Pass Band	8 < Wavelengths < 14 Microns	8 < Wavelengths < 14 Microns	8 < Wavelengths < 14 Microns
Sighting	TTL/SLR Intra-Optical Light Sighting	TTL/SLR Intra-Optical Light Sighting	Line of Sight
Focus	Focusable with VARIO-ZOOOM Sighting System	Focusable with VARIO-ZOOOM Sighting System	Factory preset
Field of View	4° to 20°	2 mm to 4°	Factory preset 4° or 15°
OPERATING CONDITIONS
Operating Environment	-10°C to 70°C, up to 99% Relative Humidity, Non-Condensing	-20°C to 70°C, up to 99% Relative Humidity, Non-Condensing	-40°C to 100°C, up to 99% Relative Humidity, Non-Condensing
Storage Temperature	-10°C to 70°C, up to 99% Relative Humidity, Non-Condensing	-20°C to 70°C, up to 99% Relative Humidity, Non-Condensing	-40°C to 100°C, up to 99% Relative Humidity, Non-Condensing
ELECTRICAL INTERFACE
Battery Life	40 Hours	40 Hours	40 Hours
Output Signal	Analog millivolt (10.0 mV/°C)	Analog millivolt (10.0 mV/°C) Serial	Analog millivolt (10.0 mV/°C)
GENERAL
Response Time	Less than 1 Second	Less than 1 Second	Less than 1 Second
Emissivity Compensation	Settable from 0.1 to 0.99 on Rear Panel	Settable from 0.1 to 0.99 on Rear Panel	Settable from 0.2 to 0.98 on Rear Panel
Operating Distance	2 cm to Infinity	2 cm to Infinity	2 cm to Infinity
Sky Radiation Detection	SKY-SPY	SKY-SPY	SKY-SPY
DATA LOGGER
Included	No	Yes	No
Channel	N/A	Single Channel	N/A
No. of Records Stored	N/A	Up to four million readings	N/A

 

Miniature, Low Temperature Infra-Red Thermometers

The MINI-THERM Model 3800L Miniaturized Infrared Temperature Sensor is especially useful for applications where the size of the infrared sensor is of particular importance. This fixed-mounted sensor is only 5/8" in diameter and 2¼" in length. It can go where other temperature sensors cannot.


The VARIO-THERM Model 6000L Infrared Temperature Sensor is the most sophisticated of all temperature sensors offered by Everest Interscience. It is unique in that it combines the VARIO-ZOOOM Field-Variable-Focus System with TTL/SLR Intra-Optical Light Sighting. The stainless steel case is only 7/8" in diameter and 2¾" in length.

Feature Comparisons
	3800L	6000L
Click the image thumbnail for full size
KEY FEATURES		VARIO-ZOOOM TTL/SLR Sighting
TEMPERATURE MEASUREMENT
Temperature Range	-40°C to 100°C	-40°C to 100°C
Resolution	0.1°C	0.1°C
Accuracy	±0.5°C	±0.5°C
Repeatability	±0.1°C	±0.1°C
Units	°C	°C
Noise Effective Temperature	±0.2°C	Less than 0.1°C
Temperature Measurement Modes	Surface Temperature only	Surface Temperature only
OPTICAL CONSIDERATIONS
Spectral Pass Band	8 < Wavelengths < 14 Microns	8 < Wavelengths < 14 Microns
Sighting	Line of Sight	TTL/SLR Intra-Optical Light Sighting
Focus	Factory preset	Focusable with VARIO-ZOOOM Sighting System
Field of View	4° or 15°	Focusable with VARIO-ZOOOM Sighting System
OPERATING CONDITIONS
Operating Environment	-40°C to 100°C, up to 99% Relative Humidity, Non-Condensing	-40°C to 100°C, up to 99% Relative Humidity, Non-Condensing
Storage Temperature	-40°C to 100°C, up to 99% Relative Humidity, Non-Condensing	-40°C to 100°C, up to 99% Relative Humidity, Non-Condensing
ELECTRICAL INTERFACE
Power Requirements	5 V to 26 V DC (Current Draw: 10 mA)	5 V to 26 V DC
Output Signal	Standard: mV (10.0mV/ °C) Optional: 0-5 Volt, 4-20 mA and Type J or K Simulated Thermocouple	Standard: Milivolt (10.0 mV/°C ) Optional: 4-20 mA, 0-5 Volt or Type J or K Thermocouple
GENERAL
Response Time	0.250 Second	0.10 Second
Emissivity Compensation	0.1 to 0.98 Settable	0.2 to 0.98 Settable
Operating Distance	2 mm to 300 meters	2 cm to 300 Meters
Sky Radiation Detection	None	None
Dimensions	15.875 mm (5/8") Diameter 57.15 mm (2¼") Length	21.875 mm (7/8") Diameter 69.85 mm (2¾") Length
EMBEDDED DATA LOGGER
Channel	N/A	N/A
No. of Records Stored	N/A	N/A

 

Fixed Mounted, Low Temperature Infra-Red Thermometers

The ENVIRO-THERM Model 4000L Infrared Temperature Sensor is the traditional temperature sensor manufactured by Everest Interscience. It has been used extensively for continuous monitoring of crops and other targets in the natural environment. The electronics for the 4000L Sensor are housed in a stainless steel case that is sealed for extra protection when using the instrument outdoors. It has the same temperature range, resolution, accuracy and repeatability as the MINI-THERM but it is two inches in diameter by three inches in length. The standard output is Analog Millivolt at 10 mV/°C. It comes with an optional 0-5 Volt output.



The ENVIRO-THERM Series includes a Model 4500L which has an embedded data acquisition system. With this data logger, a single channel is used to save up to 32,000 date/time-stamped records. The Model 4500L described below has a USB Output.



The SEA-THERM Surface Temperature Thermometer
Sea-Therm brochure

Feature Comparisons
	4000L	4500L
Click the image thumbnail for full size
KEY FEATURES	SKY-SPY	SKY-SPY
TEMPERATURE MEASUREMENT
Temperature Range	-40°C to 100°C	-40°C to 100°C
Resolution	0.1°C	0.1°C
Accuracy	±0.5°C	±0.5°C
Repeatability	±0.1°C	±0.1°C
Units	°C	°C
Noise Effective Temperature	±0.2°C	±0.2°C
Temperature Measurement Modes	Surface Temperature only	Surface Temperature only
OPTICAL CONSIDERATIONS
Spectral Pass Band	8 < Wavelengths < 14 Microns	8 < Wavelengths < 14 Microns
Sighting	Line of Sight	Line of Sight
Focus	Factory preset	Factory preset
Field of View	4° or 15°	4° or 15°
OPERATING CONDITIONS
Operating Environment	-20°C to 70°C, up to 99% Relative Humidity, Non-Condensing	-20°C to 70°C, up to 99% Relative Humidity, Non-Condensing
Storage Temperature	-20°C to 70°C, up to 99% Relative Humidity, Non-Condensing	-20°C to 70°C, up to 99% Relative Humidity, Non-Condensing
ELECTRICAL INTERFACE
Power Requirements	5 V to 26 V DC (Current Draw: 10 mA + Current Signal)	5 V to 26 V DC (Current Draw: 10 mA + Current Signal)
Output Signal	Standard: Analog Millivolt (10.0 mV/°C) Optional: 4-20 mA, 0-5 Volt	RS-232C or USB
GENERAL
Response Time	Less than 1 Second	0.1 Second
Emissivity Compensation	Preset at 0.98 or at End-User's Request	Preset at 0.98 or at End-User's Request
Operating Distance	2 cm to 300 meters	2 cm to 300 meters
Sky Radiation Detection	SKY-SPY	SKY-SPY
Dimensions	50mm Diameter by 75mm Length	50mm Diameter by 75mm Length
Mounting	Ball & Socket Swivel Mount	Ball & Socket Swivel Mount
EMBEDDED DATA LOGGER
Channel	N/A	Single Channel
No. of Records Stored	N/A	Up to 32,000 Date/Time Stamped Records

 

Model 1000 Calibration Source

The Model 1000 calibration source is used to check and verify the temperature reading of the low temperature, portable infrared thermometers.

Quickly and accurately check calibration in the field or laboratory with Everest Low-Temperature Calibration Source (Model 1000). It is a small, hand-held, self-contained, portable unit that checks the precision of any infrared thermometer with ±0.3°C accuracy.

Turn the source on and aim the infrared thermometer with its Emissivity set at .98 at the specially treated target on the Calibration Source. Then, compare the readout on the infrared thermometer or sensor to the digital readout of the target liquid crystal display.

The blackbody surface of the instrument has been prepared using proprietary high-emissivity aluminum oxide, with a configuration that uses re-entrant concentric rings. This allows the infrared energy to bounce back and forth between the rings, giving a blackbody surface closest to a perfect configuration as possible.

Click the image thumbnail for full size	Key Features
	Easy to use Accurate Lightweight Fast Do-it-yourself calibration
Specifications
Readout	Large 13 mm LCD
Power Source	9V Alkaline Transistor Battery
Scale Temperature Range	0 to 60°C
Ambient Operating Range	0 to 60°C
Absolute Accuracy	±0.3°C Over Entire Range
Resolution	0.1°C
Repeatability	±0.1°C
Controller Start-Up Equilibration Time	Instantaneous
Iris	N/A
Heating Method	None Assumes the Ambient Temp
Target Configuration	Re-Entrant Concentric Rings
Target Surface	Proprietary High Emissivity (0.98 ±0.01) Aluminum Oxide with Special High Emissivity Paint Overall

 

Click the image thumbnail for full size

Everest Interscience Glossary
SKY-SPY	The SKY-SPY corrects for unwanted sky radiation with the result that the sky radiation noise, which can normally contribute from 0.5 to 2°C random uncertainty in the Infrared Thermometer reading is now corrected such that the thermometer will perform at its laboratory calibration specification of 0.25 to 0.5°C under any sky conditions. This is achieved by incorporating another sensor to compensate for the reflected sky radiation characteristics and produce a more precise infrared measurement.
Vario-Zooom Focus (Field-Variable-Focus)	The Field-Variable-Focus Infrared Thermometry System allows varying of the focus and field view of the infrared thermometer to identfy the exact target area where a surface temperature measurement is being taken. For the life of the infrared industry, it has been necessary to be sure to match the infrared thermometer to the application. If a person wanted to measure a very minute target, it was necessary to purchase a close-focus instrument. For targets at a greater distance, an infinity focus infrared thermometer was needed. With the invention of VARIO-ZOOOM, the Field-Variable-Focus Infrared Thermometery System, this is no longer necessary. One infrared thermometer can be used for both applications referred to above. The focus can be easily changed simply by gently pushing the optics of the instrument in or pulling it out. After finding the optimum focus, the operator can lock it into place on the infrared sensors. The instrument will remain focused at that distance until it is refocused. There is no lock on the handheld units, but two rubber gaskets stop the optics from moving after the unit is focused. When focusing in the laboratory, the TTL/SLR Intra-Optical Light Sighting System, assists in adjusting the variable field of view.
TTL/SLR Intra-Optical Light Sighting	A major shortcoming of infrared thermometers is that the infrared "light" (radiation) is invisible to the human eye. Therefore, the position and physical characteristics of the spot being measured, such as its location, shape, size, surface texture, etc., cannot be ascertained by the operator. It is very important for the operator to know where all parts of the target spot are located, because, if any part of the spot is off the edge of the target surface, serious reading errors will occur. The Everest TTL/SLR (Thru-The-Lens) Intra-Optical Light Sighting System solves this problem. An illuminated image of the infrared detector is projected directly through the infrared optics of the infrared temperature sensor, illuminating the exact area where a temperature measurement is being taken. Because this light shares the optical path, it can never be knocked out of alignment. It will always illuminate the area where the optics is focused.
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.
Infrared Thermometer	A hot object "target" is radiating its infrared radiation in all directions whether or not the infrared thermometer is there taking its temperature. The object’s radiation characteristics, and hence its temperature, are not disturbed by the presence of the infrared thermometer. Infrared Thermometers (IRT): Does not produce "intrusion errors". They are non-contact thermometers. Have a quick measurement time. Can measure temperature from a distance. Can measure moving targets. Produce no energy interference or energy loss. Do not affect the target being measured.
Low-Temperature	Measures temperatures with full scale accuracy up to 100°C.
High-Temperature	Measures temperatures with full scale accuracy 1000°C plus.

 

Links and Brochures

Theory of Infrared Thermometry

Theory of Emissivity

Infra-red Thermometers References

Plant Science Instrumentation