Photometric and Radiometric Sensors
Gamma Scientific offers a catalog of professional light measurement sensors for photometric and radiometric applications. These devices are typically utilized by laboratories, OEM’s, value-added resellers and other groups seeking to accurately measure light intensity and brightness. Browse our light measurement sensor catalogs to find the right photometry or radiometry solution today.
Photometry involves the measurement of electromagnetic radiation in terms of luminous power – or the capacity to stimulate the human visual system and to be perceived as light. Photometric quantities include: luminous flux – in lumens (lm), luminous intensity (lm/sr), illuminance (lm/m2) and luminance (lm/m2 /sr).
Radiometry involves the measurement of electromagnetic radiation in terms of radiant energy - that is, measurement values are equally weighted, whether visible or invisible to the human eye. Radiometric quantities include: radiant flux (W), irradiance (W/m2) and radiance (W/m2 /sr).
Our Most Popular Photometric Sensors
Model |
Material |
Default Calibration Units |
Dynamic Range |
Wavelength Range (nm) |
Sensor Area |
Notes (1) |
|---|---|---|---|---|---|---|
211 |
Si |
Lux & fc |
1.0 x 10-2 to 1.0 x 105 lux |
400 to 700 |
1 cm2 |
|
265 |
Si |
Candela/m² & fL |
1.0 x 10-3 to 1.0 x 105 cd/m² |
400 to 700 |
0.34 cm2 |
High accuracy Photometric filter(f’1 < 3%); 13° fixed field-of-view; standard light shield |
2153V-12.5 |
Si |
Candela/m² & fL |
1.2 x 10-2 to 1.0 x 106 cd/m² |
400 to 700 |
1 cm2 |
High accuracy Photometric filter(f’1 < 3%); 12.5° fixed field-of-view |
Full Photometric Sensor Catalog
Our Most Popular Radiometric Sensors
Model |
Material |
Default Calibration Units |
Dynamic Range |
Wavelength Range (nm) |
Sensor Area |
Notes (1) |
221 |
Si |
Watts |
2.0 x 10-11 to 2.4 x 10-3 W |
350 to 1100 |
1 cm2 |
|
247 |
Si |
Watts |
5.5 x 10-11 to 6.4 x 10-3 W |
350 to 1100 |
1 cm2 |
Flat Response |
261 |
Ge |
Watts |
5.0 x 10-10 to 6.0 x 10-3 W |
800 to 1750 |
0.5 cm2 |
|
268UVA |
Si - UV |
W/cm2 @ 365nm |
5.0 x 10-10 to 9.0 x 10-4 W/cm2 |
320 to 400 |
1 cm2 |
365nm bandpass filter; opal glass diffuser |
268UVC |
Si - UV |
W/cm2 @ 254nm |
1.0 x 10-8 to 7.5 x 10-1 W/cm2 |
200 to 280 |
1 cm2 |
254nm bandpass filter w/ PTFE diffuser |
