SS-120: Field Spectroradiometer-635 to 1100 nm

The SS-120 measures a wavelength range of 635 to 1100 nm.

  • Product Name:Field Spectroradiometer-635 to 1100 nm
  • Item No.:SS-120
  • Manufacturers:Apogee
  • Country of Origin:USA

The SS-120 measures a wavelength range of 635 to 1100 nm. The spectroradiometer is an easy-to-use, cost-effective, versatile spectral measurement system that can be interfaced to a computer. Typical applications include measurement of spectral output (energy flux density, photon flux density, or illuminance) of different radiation sources (often for plant or human lighting), and reflectance and transmittance measurements of natural and synthetic surfaces and materials (often plant leaves and canopies).


The SS-120 package includes:

Spectroradiometer unit and cosine corrected detector mounted in the housing

180° FOV head and black cap

AL-200 bubble-level

USB cable for computer interface

2GB USB drive with ApogeeSpectrovision software (Windows compatible, XP and later; Mac compatible, 10.10 and later) and required drivers

Carrying case


Wavelength Range    635 to 1100 nm

Wavelength Measurement Interval    1 nm

Wavelength Resolution    3.0 nm (full-width, half-maximum)

Wavelength Accuracy    ± 0.5 nm

Wavelength Repeatability    ± 0.2 nm

Analog to Digital Resolution    14 bit

Signal to Noise Ratio    1500:1 (at maximum signal)

Stray Light    ; 0.25 %at 850 nm

Dark Noise    3 counts

Integration Time Range    10 ms to 10 s

Measurement Sensitivity    Greater than 10 % of max sensitivity for wavelengths less than 1030 nm

Measurement Repeatability    Less than 1.0 % (wavelengths less than 1020 nm)

Directional (Cosine) Response    ± 5 % at 75 ˚ zenith angle

Fields of View    180 ˚ (upward-facing), 25 ˚ or 150 ˚ (downward-facing)

Temperature Response    -0.1 ± 0.1 % per C

Current Draw    190 mA during measurement and when idle (USB)

Power Requirement    1 W (USB)

Communication Protocol    Modbus RTU over RS-232 (USB)

Interface Cable    5 m PVC jacket with USB (for computer)

Software    Apogee Spectrovision (windows compatible, XP and later, Mac compatible, 10.9 and later)

Operating Environment    -20 to 70 C, 0 to 100 % relative humidity

Thread Size (for Mounting)    1/4" – 20

Dimensions    89.3 mm height, 50.8 mm width, 38.1 mm depth

Mass    300 g

Warranty    1 year against defects in materials and workmanship