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Silicon-cell Pyranometers

Accurate and stable global shortwave radiation measurement in W m-2.
Apogee Instruments’ silicon-cell pyranometers feature a silicon-cell detector. The sensors are accurate, stable, durable, and cost-effective, the results of continual refinement of design.
Accurate Measurements - ISO 9060:2018 Class C
Calibration in controlled laboratory conditions is traceable to the World Radiometric Reference in Davos, Switzerland. The upward-looking model is cosine-corrected, with directional errors less than 20 W m-2 at 80° solar zenith angle. Long-term non-stability determined from multiple replicate pyranometers in accelerated aging tests and field conditions is less than 2 % per year.
Rugged, Self-cleaning Housing
Patented domed shaped sensor head (diffuser and body) facilitate runoff of dew and rain to keep the diffuser clean and minimize errors caused by dust blocking the radiation path. Sensors are housed in a rugged anodize aluminum body and electronics are fully potted.
Heated Option
A heated pyranometer (SP-230 All-season) is available with a 0.2 W heater to keep water (liquid and frozen) off the sensor and minimize errors caused by dew, frost, rain, or snow blocking the optical path.
Output Options
Multiple analog output options are available including: 0 to 350 mV, 0 to 2.5 V, 0 to 5.0 V, and 4 to 20 mA ranges. The silicon-cell pyranometer is also available attached to a hand-held meter with digital readout, and as a digital 'smart' sensor that uses USB communication and custom software to interface directly to a computer.
Mounting
The AL-120 Solar Mounting Bracket with Leveling Plate facilitates mounting the sensor to a mast or pipe. The AL-100 Solar Sensor Leveling Plate is designed to level the sensor while sitting on a flat surface or mounting to a surface.
Typical Applications
Applications include shortwave radiation measurement in agricultural, ecological, and hydrological weather networks. Sensors are also used to optimize photovoltaic systems.
High Quality Cable
Pigtail-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 flexibility in cold conditions.
Warranty and Support
All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.

Product Manuals

Specification Sheets

Technical Drawings

Software & Datalogger Programs

Recalibration & Repair

Application Information

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 SP-110SP-212SP-214SP-215SP-230SP-420SP-421
ISO 9060:2018 Class C (previously known as second class) Class C (previously known as second class) Class C (previously known as second class) Class C (previously known as second class) Class C (previously known as second class) Class C (previously known as second class) Class C (previously known as second class)
Power Supply Self-powered 3.3 to 24 V DC; current draw 10 µA 7 to 24 V DC, maximum current draw of 22 mA (2 mA quiescent current draw) 5.5 to 24 V DC; current draw 10 µA 12 V DC for heater with a current draw of 15 mA - -
Output (Sensitivity) 0.2 mV per W m-2 2 mV per W m-2 0.008 mA per W m-2 4 mV per W m-2 0.2 mV per W m-2 - -
Output Type 0 to 400 mV 0 to 2.5 V 4 to 20 mA 0 to 5 V 0 to 400 mV USB SDI-12
Resolution - - - - - 0.1 W m-2 -
Digital Input Voltage - - - - - - 5.5 to 24 V
Calibration Factor (Reciprocal of Output) 5 W m-2 per mV 0.5 W m-2 per mV 125 W m-2 per mA, 4.0 mA offset 0.25 W m-2 per mV 5 W m-2 per mV Custom for each sensor and stored in firmware -
Calibration Uncertainty ± 5 % ± 5 % ± 5 % ± 5 % ± 5 % ± 5 % ± 5 %
Measurement Repeatability Less than 1 % Less than 1 % Less than 1 % Less than 1 % Less than 1 % Less than 1 % Less than 1 %
Long-term Drift Less than 2 % per year Less than 2 % per year Less than 2 % per year Less than 2 % per year Less than 2 % per year Less than 2 % per year Less than 2 % per year
Non-linearity Less than 1 % up to 2000 W m-2 Less than 1 % up to 2000 W m-2 Less than 1 % up to 2000 W m-2 Less than 1 % up to 2000 W m-2 Less than 1 % up to 2000 W m-2 Less than 1 % up to 2000 W m-2 Less than 1 % up to 2000 W m-2
Response Time Less than 1 ms Less than 1 ms Less than 1 ms Less than 1 ms Less than 1 ms Software updates every second Less than 0.5 s
Field of View 180° 180° 180° 180° 180° 180° 180°
Spectral Range 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm
Directional (Cosine) Response ± 5 % at 75° zenith angle ± 5 % at 75° zenith angle ± 5 % at 75° zenith angle ± 5 % at 75° zenith angle ± 5 % at 75° zenith angle ± 5 % at 75° zenith angle ± 5 % at 75° zenith angle
Spectral Range 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm 360 to 1120 nm
Temperature Response 0.04 ± 0.04 % per C 0.04 ± 0.04 % per C 0.04 ± 0.04 % per C 0.04 ± 0.04 % per C 0.04 ± 0.04 % per C 0.04 ± 0.04 % per C 0.04 ± 0.04 % per C
Operating Environment -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m
Dimensions 24 mm diameter; 33 mm height 24 mm diameter; 33 mm height 24 mm diameter; 33 mm height 24 mm diameter; 33 mm height 24 mm diameter; 33 mm height 24 mm diameter; 33 mm height 24 mm diameter; 44 mm height
Mass (with 5 m of cable) 90 g 90 g 140 g 90 g 90 g 90 g 177 g

Silicon-cell Pyranometers

SP-230 All-Season Pyranometer Time Lapse

Pyranometer User's Guide

Apogee Instruments Meter User Guide

How to Choose a Pyranometer

Making a Durable Wire Splice

Connecting an SP-214-SS Pyranometer Serial Numbers 9898 and Above to an SMA Cluster Controller

If you can't access the videos via Youtube, click here.

Google's Project Loon
Apogee's SP-230 heated pyranometer was selected to monitor PV panels on Project Loon.
Read More >
Monitoring PV Panels on Jin Jeop Library
SP-110's are integrated as part of a PV monitoring sytem for a PV power generation facility on the roof of the Jin Jeop library in Korea.
Read More >
Solar Power Plants on Lakes and Dams
Studying solar radiation at different angles to determine locations for solar power plants.
Read More >

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

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AA-100: Protective Carrying Case

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Apogee Instruments AL-100 Solar Sensor Leveling Plate
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AL-100: Solar Sensor Leveling Plate

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AL-120 Solar Mounting Bracket is designed to mount Apogee Instruments solare sensors models SP, SL, SQ, and SU.
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AL-120 Solar Mounting Bracket with Leveling Plate

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AM-310: Sensor Wand

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AM-320 Water Submersible Sensor Wand

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Apogee Instruments AL-210 Meter Leveling Plate/Mounting Bracket
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AL-210 :Meter Leveling Plate / Mounting Bracket

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The AM-001 Meter Mounting Bracket is designed for handheld meters with solar radiation sensors attached via cable (MQ-200, MQ-500, MU-200, MP-200). The bracket mounts the sensor to the back of the meter, as seen in the image to the right, maiking it easier for the user to take sample measurements with the sensor and meter.
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Apogee Instruments AC-100 Communication Cable
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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: (435) 792-4700
Tech Support: (435) 245-8012

Fax: (435) 787-8268

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    • Pyranometers
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    • 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
    • Red/Far Red and PAR/Far Red Sensors
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    • NDVI and PRI Sensors
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