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Infrared Radiometers

Apogee infrared radiometers offer high accuracy, non contact surface temperature measurements.
High-accuracy, non-contact surface temperature measurements for environmental applications in harsh conditions
Depending on the accuracy required for your application, Apogee offers several Research-Grade sensors with ± 0.2 C uncertainty and a lower-priced Commercial-Grade sensor with ± 0.5 C uncertainty.
High-Accuracy Measurements
All Apogee IR sensors are NIST traceable and include a calibration certificate. Sensors are calibrated to a custom black-body cone with theResearch-Grade sensorsfeaturing a measurement uncertainty of ± 0.2 C from -30 to 65 C when the sensor (detector) temperature is within 20 C of the surface (target) being measured.Commercial-Grade sensorshave a measurement uncertainty of ± 0.5 C from 0 to 50 C when the sensor is within 20 C of the surface target. Radiometers are only sensitive from 8 to 14 µm (atmospheric window) to minimize the influence of water vapor and CO2on the measurement.
Field of View Options
Research-Grade sensorscome in five fields of view (FOV), including: three circular and two horizontal apertures.The Commercial-Grade sensorcomes in a single 22° half-angle FOV option.
Image comparing infrared radiometer fov options side-by-side
Image comparing infrared radiometer fov options
Typical Applications
Plant canopy temperature measurement for use in plant water status estimation, phenotyping, phenomics, road surface temperature measurement for determination of icing conditions, terrestrial surface (soil, vegetation, water, snow) temperature measurement in energy balance studies, and more.
Image of the SI-111 Research-Grade infrared radiometer close up
Image of the SIL-411 Commercial-Grade infrared radiometer close up
Image of an infrared radiometer used in robot vineyard monitoring
Output Options
Research-Grade sensorsare available in analog and digital outputs including unamplified voltage outputs, SDI-12, and Modbus communication protocols. Research-Grade sensors are also available attached to a hand-held meter with digital readout.Commercial-Grademodels come in SDI-12 output only with an analog version coming soon.
Mounting
Research-Grade sensorsuse theAM-220mounting bracket while theCommercial-Grade sensorsuse theAM-250bracket, both of which are designed to orient sensors at varying angles for different applications. Brackets can be mounted to a mast or pipe.
Rugged Housing
All sensors have a rugged anodized aluminum body with fully-potted electronics. Both types feature a radiation shield to reduce rapid thermal fluctuations of the sensor body. TheResearch-Grade sensor'sradiation shield is made from powder-coated aluminum with a polished interior for lower emissivity. TheCommercial-Grade sensor'sradiation shield is made from rugged, UV resistant, polished ASA plastic.
High Quality Cable
Research-Gradepigtail-lead sensors feature an IP68, marine-grade stainless-steel cable connector approximately 30 cm from the head to simplify sensor removal for maintenance and recalibration. Cable is shielded, twisted-pair wire with a TPR jacket for high water resistance, UV stability, and flexibiliy in cold conditions.Commercial-Gradepigtail lead sensors have the same high-quality cable, but do not have a stainless-steel connector.
Image of infrared radiometer with cable connector located 30 cm from the head.
Warranty and Support
All Apogee products are backed by an industry-leading four-year warranty and outstanding customer support.
Learn more about the infrared radiometer specifications.

Specs Table

Learn More
Watch videos to learn more about our infrared radiometers.

Videos

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Apogee Instruments infrared radiometer case studies.

Case Studies

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Product support information for infrared radiometers.

Support Info

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  • Infrared Radiometer Support

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  • $0.00 - $182.00
  • $182.00 - $359.00
  • $359.00 - $535.00
  • $535.00 - $712.00
  • $712.00 - $889.00
Apogee Instruments SI-111 Standard Field of View Infrared Radiometer
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SI-111-SS: Research-Grade Standard Field of View Infrared Radiometer Sensor

$689.00
Apogee Instruments SI-121 Narrow Field of View Infrared Radiometer
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SI-121-SS: Research-Grade Narrow Field of View Infrared Radiometer Sensor

$689.00
Apogee Instruments SI-131 Ultra-narrow Field of View Infrared Radiometer
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SI-131-SS: Research-Grade Ultra-Narrow Field of View Infrared Radiometer Sensor

$689.00
Apogee Instruments SI-1H1 Horizontal Field of View Infrared Radiometer
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SI-1H1-SS: Research-Grade Horizontal Field of View Infrared Radiometer Sensor

$689.00
Apogee Instruments SI-411 SDI-12 Digital Output Standard Field of View Infrared Radiometer
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SI-411-SS: Research-Grade SDI-12 Digital Output Standard Field of View Infrared Radiometer Sensor

$789.00
Apogee Instruments SI-421 SDI-12 Output Narrow Field of View Infrared Radiometer
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SI-421-SS: Research-Grade SDI-12 Digital Output Narrow Field of View Infrared Radiometer Sensor

$789.00
Apogee Instruments SI-431 SDI-12 Digital Output Ultra-narrow Field of View Infrared Radiometer
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SI-431-SS: Research-Grade SDI-12 Digital Output Ultra-Narrow Field of View Infrared Radiometer Sensor

$789.00
Apogee Instruments SI-4H1 Digital Output Horizontal Field of View Infrared Radiometer
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SI-4H1-SS: Research-Grade SDI-12 Digital Output Horizontal Field of View Infrared Radiometer Sensor

$789.00
SI-411 StanSI-4HR: SDI-12 Digital Output Horizontal Field of View Infrared Radiometer Sensordard Field of View Close Up
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SI-4HR-SS: Research-Grade SDI-12 Road Surface Infrared Radiometer Sensor

$889.00
SI-511-SS: Research-Grade Modbus Digital Output Standard Field of View Infrared Radiometer Sensor
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SI-511-SS: Research-Grade Modbus Digital Output Standard Field of View Infrared Radiometer Sensor

$789.00
SI-521-SS: Research-Grade Modbus  Digital Output Narrow Field of View Infrared Radiometer Sensor
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SI-521-SS: Research-Grade Modbus Digital Output Narrow Field of View Infrared Radiometer Sensor

$789.00
SI-531-SS: Research-Grade Modbus Digital Output Ultra-Narrow Field of View Infrared Radiometer Sensor
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SI-531-SS: Research-Grade Modbus Digital Output Ultra-Narrow Field of View Infrared Radiometer Sensor

$789.00
SI-5H1-SS: Research-Grade Modbus Digital Output Horizontal Field of View Infrared Radiometer Sensor
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SI-5H1-SS: Research-Grade Modbus Digital Output Horizontal Field of View Infrared Radiometer Sensor

$789.00
SI-5HR-SS: Research-Grade Modbus Road Surface Infrared Radiometer Sensor
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SI-5HR-SS: Research-Grade Modbus Road Surface Infrared Radiometer Sensor

$789.00
SIF-111 Fast Response, Standard Field of View Infrared Radiometer
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SIF-111-SS: Research-Grade High Speed, Standard Field of View Infrared Radiometer

$689.00
sif - 121快速响应,狭窄的视野Infrared Radiometer
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SIF-121-SS: Research-Grade High Speed, Narrow Field of View Infrared Radiometer

$689.00
SIF-1H1 Fast Response, Horizontal Field of View Infrared Radiometer
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SIF-1H1-SS: Research-Grade High Speed, Horizontal Field of View Infrared Radiometer

$689.00
sil - 411:商用SDI-12数字输出andard Field of View Infrared Radiometer Sensor
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sil - 411:商用SDI-12数字输出andard Field of View Infrared Radiometer Sensor

$449.00
MI-210 Standard Field of View Infrared Radiometer with Handheld Meter
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MI-210: Research-Grade Standard Field of View Infrared Radiometer with Handheld Meter

$818.00
MI-220: Research-Grade Narrow Field of View Infrared Radiometer with Handheld Meter
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MI-220: Research-Grade Narrow Field of View Infrared Radiometer with Handheld Meter

$818.00
MI-230: Research-Grade Ultra-Narrow Field of View Infrared Radiometer with Handheld Meter
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MI-230: Research-Grade Ultra-Narrow Field of View Infrared Radiometer with Handheld Meter

$818.00
MI-2H0: Research-Grade Horizontal Field of View Infrared Radiometer with Handheld Meter
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MI-2H0: Research-Grade Horizontal Field of View Infrared Radiometer with Handheld Meter

$818.00
AT-100 microCache Bluetooth Micro Logger
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AT-100 microCache Bluetooth Micro Logger

$319.00
AA-100: Protective Carrying Case
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AA-100: Protective Carrying Case

$24.00
AM-220: Angle Infrared Radiometer/Leaf and Bud Temperature Sensor Mounting Bracket
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AM-220: Angle Infrared Radiometer/Leaf and Bud Temperature Sensor Mounting Bracket

$48.00
AM-250: Angle Commercial-Grade Infrared Radiometer Mounting Bracket
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AM-250: Angle Commercial-Grade Infrared Radiometer Mounting Bracket

$28.00
AL-050 Magnetic Angle Locator
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AL-050 Magnetic Angle Locator

$18.00
AC-100: Communication Cable
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AC-100: Communication Cable

$62.00
AB-100: Meter Battery
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AB-100: Meter Battery

$5.00
AC-421 SDI-12 to USB Converter
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AC-421 SDI-12 to USB Converter

$130.00

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About Apogee Instruments, Inc.

Address:
721 West 1800 North
Logan, UT 84321
United States of America

Hours: Monday-Friday 8 AM- 5 PM MST

Main Line / Order Status: (435) 792-4700
or sales@apogeeinstruments.com

Technical Sales and Support: (435) 245-8012
or techsupport@apogeeinstruments.com

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