UDT Instruments, a division of Gamma Scientific, offers an extensive selection of photometers, radiometers, reference standard detector systems and transimpedance amplifiers to meet your testing requirements.
Combining our wide range of optometers, detectors and accessories, with our state-of-the-art calibration facilities, allows our applications engineers to assemble and configure custom systems for nearly any project.
System Configuration Guide
Learn how to configure a photometer or radiometer system to meet your testing requirements with this free guide from Gamma Scientific.
Guide to Photometry
What’s in the Guide?
- Definitions of the most important terms in photometry
- Photometric to radiometric conversion factors
- How to specify a photometer system
- Photometric quantity units, symbols and abbreviations
Guide to Radiometry
What’s in the Guide?
- Definitions of the most important terms in radiometry
- How to specify a radiometer system
- Radiometric quantity units, symbols and abbreviations
- Calibration by transfer of standards
Optical Power Meters
We offer an extensive selection of photometers, lux meters, luminance meters, illuminance meters and optical sensors to meet your photometric test and measurement needs.
Our photometric sensors are designed with the most accurate photometric filters in the world to accurately match the human eye response.
Radiometers & Photometers
Combining our optometers, radiometric sensors and accessories, with our state-of-the-art calibration facilities, our applications engineers can assemble and configure custom radiometer systems for nearly any project.
Reference Standard Detectors
The TIA-3000 Measurement Systems are detector-based absolute standards for a variety of high-accuracy measurements. Off-the-shelf configurations include thermo-electrically cooled silicon and indium gallium arsenide (InGaAs) detectors.
The UDT Tramp is a transimpedance amplifier (current-to-voltage) instrument which provides a low input impedance to accurately measure the short circuit current of phototransducers such as silicon and germanium photodetectors, vacuum photodiodes and photomultiplier tubes.