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Pyrgeometer Support

Pyrgeometer Support

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Pyrgeometer Specifications
Apogee Instruments Pyrgeometer Specifications
  SL-510
Upward-looking
SL-610
Downward-loking
Sensitivity 0.12 mV per W m-2 (variable from sensor to sensor, typical value listed) 0.12 mV per W m-2 (variable from sensor to sensor, typical value listed)
Calibration Factor (Reciprocal of Sensitivity) 8.5 W m-2 per mV (variable from sensor to sensor, typical value listed) 8.5 W m-2 per mV (variable from sensor to sensor, typical value listed)
Calibration Uncertainty ± 5 % ± 5 %
Measurement Range -200 to 200 W m-2 (net longwave irradiance) -200 to 200 W m-2 (net longwave irradiance)
Measurement Repeatability Less than 1 % Less than 1 %
Long-term Drift Less than 2 % change in sensitivity per year Less than 2 % change in sensitivity per year
Non-linearity Less than 1 % Less than 1 %
Response Time Less than 0.5 seconds Less than 0.5 seconds
Field of View 180° 150°
Spectral Range 5 to 30 µm 5 to 30 µm
Temperature Response Less than 5 % from -15 to 45 C Less than 5 % from -15 to 45 C
Window Heating Offset Less than 10 W m-2 Less than 10 W m-2
Zero Offset B Less than 5 W m-2 Less than 5 W m-2
Tilt Error Less than 0.5 % Less than 0.5 %
Uncertainty in Daily Total ± 5 % ± 5 %
Temperature Sensor 30 kΩ thermistor, ± 1 C tolerance at 25 C 30 kΩ thermistor, ± 1 C tolerance at 25 C
Output from Thermistor 0 to 2500 mV (typical, other voltages can be used) 0 to 2500 mV (typical, other voltages can be used)
Input Voltages Requirement for Thermistor 2500 mV excitation (typical, other voltages can be used) 2500 mV excitation (typical, other voltages can be used)
Heater 780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC 780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC
Dimensions 27.5 mm height, 23.5 mm diameter 27.5 mm height, 23.5 mm diameter
Mass 90 g 100 g

 

Pyrgeometer Videos
Apogee Instruments Pyrgeometer Videos

How to Use the AL-120 Leveling System

Making a Durable Wire Splice

 

Pyrgeometer Case Studies
Apogee Instruments Pyrgeometer Case Studies
About Pyrgeometers

All objects with a temperature above absolute zero emit electromagnetic radiation. The wavelengths and intensity of radiation emitted are related to the temperature of the object. The atmosphere and terrestrial surfaces (e.g., soil, plant canopies, water, snow) emit radiation in the mid infrared portion of the electromagnetic spectrum (approximately 4-50 µm).

Pyrgeometers are sensors that measure the net longwave radiation difference between the detector surface and surface the detector is directed towards (typically, atmosphere or ground surface). Longwave radiation emitted by the surface of interest can be calculated with the additional measurement of detector temperature, typically accomplished via an internal thermistor or PRT.

Typical Applications

Typical applications of pyrgeometers include:

• Measurement of incoming longwave radiation from the sky and outgoing longwave radiation from terrestrial surfaces in atmospheric and energy balance studies

• Incoming longwave radiation measurements from pyrgeometers for frost prediction models

• Integration into net radiometers for measurement of net radiation at the land surface

Cooling Without Air Conditioning
Cooling Without Air Conditioning
Creating the first known radiant cooling system the leaves people comfortable in the hot and humid tropics without condensing water.
Read More >
PDF >

If you would like to share your application of this product, please click here

 

Pyrgeometer Product Manuals
Apogee Instruments Pyrgeometer Product Manuals

Pyrgeometer Manual (SL-510 & SL-610) >

 

Pyrgeometer Specification Sheets
Apogee Instruments Pyrgeometer Specification Sheets

Pyrgeometer Spec Sheet (SL-510 & SL-610) >

 

Pyrgeometer Technical Drawings
Apogee Instruments Pyrgeometer Technical Drawings

Radiation Shield Tech Drawing (SL-510 & SL-610) >

 

 FAQs
For FAQs Click Here

 

Pyrgeometer Software & Datalogger Programs
Specification Sheets Icon
Sample Datalogger Programs

Programs are in .CR1X format and can be downloaded for use with Campbell Scientific dataloggers. Right click and select "Save target as..." or an equivalent command in your browser. They can also be viewed using Wordpad or other text viewers.

Note: In 2020 the CR1000 Campbell Scientific datalogger was discontinued. Click here to access the discontinued .CR1 format sample datalogger programs >

Pyrgeometer - Unamplified >

 

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  • products
    • Pyranometers
    • Quantum (PAR, ePAR, ePFD) Sensors / Meters
    • Daily Light Integral Measurement
    • Infrared Radiometers
    • Aspirated Radiation Shield
    • Spectroradiometers
    • Net Radiometer
    • Pyrgeometers
    • Humidity Probes
    • Temperature Sensors
    • Leaf and Bud Temperature Sensor
    • Oxygen Sensors
    • UV Sensors
    • Chlorophyll Concentration
    • Barometric Pressure
    • PAR Meters for Aquariums
    • microCache Bluetooth Micro Logger
    • Red - Far-red and PAR-FAR Sensors
    • Photometric Sensor
    • PRI Sensors
    • Solar Energy PV Monitoring
    • Accessories
    • Calibration Services
    • Replacement Cables
    • Refurbished Products
  • About Us
    • Contact Us
    • International Distributors
    • Careers
    • Apogee News
    • Company History
    • Event Calendar
    • Staff Listing
    • Apogee Cares
    • Our Founder - Dr. Bruce Bugbee
    • Distributor Application
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