Complete Package
Includes spectroradiometer and cosine-corrected detector mounted in the housing, cable for datalogger interface, USB cable for computer interface, and USB drive with required drivers and software (compatible with all 32-bit and 64-bit Windows operating systems).
Unattended Field Measurements
The Spectroradiometer is small and lightweight with all measurement components contained in the rugged, weatherproof housing. Power consumption is low (1.2 W at 12 V DC during measurement, 0.1 W at 12 V DC when idle), temperature compensation is automatic, and unit can be interfaced to a datalogger (via ModBus communication protocol), allowing unattended measurement in the field.
Field of View Options
Three field of view (FOV) options are available: 180° (hemispherical FOV for measurement of incoming radiation), 150° (wide FOV for measurement of reflected radiation), and 25° (narrow FOV for measurement of reflected radiation).
Wavelength Range Options
Two wavelength options are available: 340 to 820 nm (SS-110) and 635 to 1100 nm (SS-120).


Wavelength Range |
635 to 1100nm |
Wavelength Resolution |
3.0nm (FWHM) |
Irradiance Calibration Uncertainty |
±5% |
Signal to Noise Ratio |
1500:1 (at maximum signal) |
Measurement Sensitivity |
greater than 10% of full-scale signal (wavelengths less than 1030nm) |
Measurement Repeatability |
less than 1.0% (wavelengths less than 1020nm) |
Directional (Cosine) Response |
±5% at 75° zenith angle |
Fields of View |
180° (upward-facing), 25° or 150° (downward-facing) |
Operating Environment |
-20 to 70°C, 0 to 100% RH |
Temperature Response |
-0.09 ±0.10% per °C |
Current Drain |
100mA (fastest scan rate) |
Communication Protocol |
Modbus RTU over RS-232 (Pigtail and USB) |
Dimensions |
89.26mm (height) x 50.8mm (width) x 38.1mm (depth) |
Mass |
300g |
Warranty |
4 years against defects in materials and workmanship |

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Protective carrying case designed to transport and store Apogee meters, sensors, and accessories.
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AL-100 Solar Sensor Leveling Plate
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AM-110: Solar Sensor Mounting Bracket
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The AP-001 Field Spec Reflectance Package was made to include everything needed to make reflectance measurements. The package includes:
- AS-010: 150 Degree FOV/Reflectance Head
- AS-011: 25 Degree FOV/Reflectance Head
- AS-013: Angled Field Spectroradiometer Mounting Bracket
- AS-014: Field Spec Angle-mounted Solar Shield
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The AS-010 150° FOV / Reflectance Head is an accessory for Apogee Field Spectroradiometers model SS-110 and SS-120. The head gives a wide field of view for measurement of reflected radiation.
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The AS-011 25° FOV / Reflectance Head is an accessory for Apogee Field Spectroradiometers model SS-110 and SS-120. The head gives a narrow field of view for measurement of reflected radiation.
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The AS-012 Field Spec Upward Solar Shield is used with the Apogee Field Spectroradiometer models SS-110 and SS-120, and is designed to protect it from solar radiation when mounted upward. The AS-012 attaches to the AL-200 leveling plate included with the SS-110 and SS-120 spectroradiometers.
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The AS-013 Angled Field Spec Mounting Bracket facilitates angled mounting of Apogee Field Spectroradiometers model SS-110 and SS-120 to a mast or a pipe.
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The AS-014 Field Spec Angle-mounted Solar Shield is used to protect the Apogee Field Spectroradiometer model SS-110 and SS-120 from solar radiation when mounted at an angle.