Light Measurement
Photometers
Photometers are specifically designed to measure emitted, reflected or transmitted light in photometric terms of luminous flux, luminance, illuminance or luminous intensity. They utilize a single detector - usually a photomultiplier tube or silicon detector - and a filter that changes the system response to match the photopic function recommended by the Commission Internationale de l'Eclairage (International Commission on Illumination). They report the brightness of a light as observed by a standard human eye.
Measurements of displays typically require results in luminance (cd/m² or footlamberts). Our photometers feature the patented Pritchard optical system to clearly and unambiguously define the area to be measured.
Portable battery powered photometer using a photopically corrected silicon detector. Includes 4 automated apertures giving a range of measurement sizes.
Portable battery powered photometer using a photopically corrected PMT detector for high sensitivity. Ideal for low light level or small spot size measurements.
Portable battery powered photometer using a photopically corrected PMT detector. Includes 4 automated apertures giving a range of measurement sizes.
Portable battery powered photometer using a photopically corrected ultra sensitive PMT detector. Includes 4 automated apertures and is ideal for the most demanding applications.
Hand held autoranging photometer with accessories for luminance (cd/m²) and illuminance (Lux). Ideal for human factors and room lighting applications.
Hand held photometer with accessories for luminance (cd/m²) and illuminance (Lux) and the capability to make colour measurements.
Portable battery powered, measuring from 380-780nm using a 256 pixel detector and also contains a PMT photometer for low light level measurements. The two detectors use the same optics so measurement location repeatability is ensured.
Like the PR-680 it measures from 380-780nm using a 256 pixel detector and also contains an ultra sensitive PMT photometer for low light level measurements. The two detectors use the same optics so measurement location repeatability is ensured.
Portable battery powered, measuring from 380-780nm using a 256 pixel detector and also contains a PMT photometer for low light level measurements. The two detectors use the same optics so measurement location repeatability is ensured.
High specification constant readout photometer. Now with optional USB readout capability.
Single aperture constant readout spot photometer - Photo Research spotmeters are the standard of the industry
Multi-purpose instrument designed to measure military displays for NVIS luminance and radiance.