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.

PR-810L

Portable battery powered photometer using a photopically corrected PMT detector. Includes 4 automated apertures giving a range of measurement sizes.

PR-810L

Portable battery powered photometer using a photopically corrected ultra sensitive PMT detector. Includes 4 automated apertures and is ideal for the most demanding applications.

PR680 - Spectroradiometer

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.

PR680L - Spectroradiometer

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.