The model 221 radiometric sensor is our standard silicon sensor.  It can be combined with a wide range of accessories including optical filters, diffusers, integrating spheres and spacers.

Our wide range of optical power meters, photometric and radiometric sensors is complemented by ISO/IEC 17025 accreditation by NVLAP (NVLAP lab code 200823-0), resulting in unmatched performance and custom configuration as required.

Key Specifications                                 Part No. U23-01-102

Key Features

High Linearity, Low Noise

Detector Information

Silicon   1.0 cm2 active area

Rise Time

3 µ sec

Dynamic Range

5 x 10-11 to 2.4 x 10-3 W

Typical Response

5.1 x 10-1 A/W @ 980 nm

Calibration Range

350 to 1100 nm in 10 nm steps


2 meter, included

Compatible with the UDT Handheld and Benchtop series Optical Meters and Integrating Spheres.

Specifications are subject to change without notice.