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Infrared Temperature Sensor

High-accuracy, non-contact surface temperature measurement

Apogee Instruments' infrared radiometers combine high accuracy, durability, and low cost.

Click for full screen   About Dr. Bruce Bugbee

Click for full screen   About Dr. Bruce Bugbee

Accurate Measurements
Calibrated to a custom black-body cone with 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. Radiometers are only sensitive from 8 to 14 µm (atmospheric window) to minimize the influence of water vapor and CO2 on the measurement.
  Field of View Options
Four field of view (FOV) options, including: three circular and one horizontal aperture. Custom FOVs available upon request.
IRR Sensor MI-210 from Apogee Instruments
Rugged Housing
Anodized aluminum body with fully-potted electronics. The radiation shield reduces thermal fluctuations.
  Output Options
Analog and digital output options are available. Analog versions include un-amplified and amplified voltage outputs. Digital versions include SDI-12 communication protocols.
Typical Applications
Plant canopy temperature measurement for use in plant water status estimation, road surface temperature measurement for determination of icing conditions, and terrestrial surface (soil, vegetation, water, snow) temperature measurement in energy balance studies.
  Warranty and Support
All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.


Apogee Instruments IRR sensors come in different field of view options. Apogee Instruments IRR sensors come in different field of view options.



Additional Information
Applications Infrared Radiometer Applications and Works CitedApogee Featured Projects Technical information Apogee Instruments Infrared Radiometer Technical Information
Instructions Using Your Apogee Instruments Infrared Radiometer calculators.png Infrared Radiometer Calculators
Owner’s Manuals Spec Sheets: SI-100 and SI-400 Sensors, MI Series Meters
Owner's Manual:
SI-100 Series (Analog), SI-400 Series (Digital SDI-12)MI Series
  Sample Programs: Edlog, CRBasic, LoggerNet Short Cut Instructions


Application Information
1. Sample datalogger programs
2. Excel sheet programmed to calculate target area
3. Design and Calibration of a New Infra-red Radiometer
4. How to take IRR Temperature Measurements without a Datalogger
5. Emissivity Correction for Infrared Radiometer Sensors
6. Estimating the Canopy Fraction in your IRR Field of View
7. Field of View explained
8. Horizontal FOV Infrared Radiometer: More Information
9. IRR SI Radiation Shield: More Information
10. Protecting Your Instruments from Spiders, Wasps, and Other Pests
11. Apogee Meter Tips and Troubleshooting
12. Mark Blonquist's webinar on Using Infrared Thermometers for Plant Science Research
Visit our knowledge base for more information







For other temperature sensor options click here.