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Enabling better global research outcomes in soil, plant & environmental monitoring.

Apogee SS-120 Spectroradiometer

The SS-120 is Apogee Instruments' new low-cost, research-grade spectroradiometer, designed for long-term outdoor and indoor measurements.
Measures NIR range (635 to 1100nm).

  • Flexible Interface
    Connects directly to a PC via USB or to dataloggers via ModBus RTU over RS232.
  • Extra-rugged Design
    Equally suited for long term measurements on outdoor installations or for spot measurements in the lab.
  • Versatile Function
    Measures irradiance, reflectance, and/or transmission to quantify incoming radiation spectra or index ratios.
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

SS-110 120 Dimensions

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).

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Screen Shot 01-15-16 at 11.26 AM

  • AA-100: Protective Carrying Case
    Protective carrying case designed to transport and store Apogee meters, sensors, and accessories.
  • AL-100 Solar Sensor Leveling Plate
    AL-100 Solar Sensor Leveling Plate
  • AM-110 Solar Sensor Mounting Bracket
    AM-110: Solar Sensor Mounting Bracket
  • AP-001 Field Spectroradiometer Reflectance Package
    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
  • AS-010 150° FOV / Reflectance Head
    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.
  • AS-011 25° FOV / Reflectance Head
    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.
  • AS-012 Field Spec Upward Solar Shield
    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.
  • AS-013 Angled Field Spec Mounting Bracket
    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.
  • AS-014 Field Spec Angle-mounted Solar Shield
    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.