940 LED-1200 Series Goniometers

Our 940 LED-1200 Goniometers are optimized to provide precise measurement of angle dependent spatial radiation properties of large LED luminaires, lamps and modules, with models optimized for measuring different samples sizes. The 940 LED-1200 measures samples up to 1250 mm in diameter and 30 kg in weight, and comply with CIE, DIN and IES standards.

All Goniometer products from Gamma Scientific are accompanied by ISO17025 accredited calibration (NVLAP lab code 200823-0) for accuracy and certainty.

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Complete Goniometric Measurement Systems

  • Rapid, precise characterization of of spatial light distribution
  • Accurate measurement of LED luminaires, lamps and modules
  • Models optimized for specific sample sizes
  • Work seamlessly with our spectroradiometers or photometers to measure luminous flux, color coordinates or CRI
  • Conform with CIE, DIN and IES standards

Our wide range of Goniometric light measurement solutions are complemented by ISO/IEC 17025 accreditation by NVLAP (NVLAP lab code 200823-0), resulting in unmatched performance and custom configuration as required.



Goniometer Type

 Moving luminaire goniometer


 Stepper motor

Angular Range C (horizontal) Axis

 ± 160° with end switches

Angular Range Gamma (vertical) Axis

 ± 160° with end switches

Resolution of Angle encoder


Reproducibility of C-Axis

 ≤ 0.1° at maximum sample load

Reproducibility of Gamma-Axis

 ≤ 0.05° at maximum sample load

Angular Speed of C-Axis

 16 speeds (minimum) selectable to maximum 25° / second

Angular Speed of Gamma-Axis

 16 speeds (minimum) selectable to maximum 14° / second

Travel Range Z-Axis

 311 mm

Alignment Laser

 Mounted in the center of rotation of the Gamma axis, 1 mW, Class 2 laser

Equipment Setup

 Stable base with integrated controller


1118 mm


 940 mm


 940 mm


 50 kg

Optical Axis Height

 965 mm


 USB for connection to PC

Power Supply

 115 / 230 VAC   50/60 Hz

Power Rating

 120 W max


 0 to 35° C          Relative Humidity 0 to 90% non-condensing


                           Sample Table

Mounting Plate

 350 mm diameter

Maximum Sample Size

 1250 mm diameter

Maximum Sample Mass

 30 kg

Specifications are subject to change without notice.  

Complete Goniometric Measurement Systems

GS-1220-GONIO-1200 LED/Luminaire Goniometric Spectral Measurement System, includes GS-1220-1-RM spectroradiometer (360-900 nm, 2.5nm slit setting, with shutter),  2m flexible fiber-optic coupler, Model 18795 Cosine Collector/Fiber Adapter with 1.5 inch sphere, Model 24876 baffle tube, 940T detector tripod, Light Touch LED software, light touch controller, 940LED-1200 Computer Controlled Goniometer, Type C with horizontal axis, for luminaires up to 1.25m. 
GS-470-GONIO-1200 LED/Luminaire Goniophotometric Measurement System, includes UDTi S470 flexOptometer,  20m USB extension cable, Model 3211 Diffused Photometric Sensor calibrated in lux, Model 24876 baffle tube, Light Touch LED software, light touch controller, 940T detector tripod, 940LED-1200 Computer Controlled Goniometer, Type C with horizontal axis, for luminaires up to 1.25m. 


Other Options

940T Tripod for use with RadOMA and 940LED-xxxx goniometer systems. Compatible with 66146 RadOMAcam telescope and detectors with 1/4-20 threaded insert.

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  • 360 to 900 nm
  • 360 to 1100 nm


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