SiTek Electro-Optics, manufacturer of Position Sensitive Detectors (PSD) was founded under the name Sitek Laboratories in 1976 as a spin-off from Chalmers Technical University in Gothenburg Sweden. Th...

ON-TRAK Photonics Corporation was founded in 1991 and is now a leading manufacturer of measurement equipment based on position sensing detector (SiTek PSD) technology. ON-TRAK meets the increasing dem...

GL Optic develops and produces reliable, precise and intuitively operated spectrometers and light measuring instruments and offers complete SOLUTIONS for measuring LUX, lumen, CRI, CCT, COLOR, and lum...

Centronic is based in Croydon (near London) and has more than 30 years experience in developing and manufacturing sensor solutions for measuring or detection of photonic and ionising radiation. The co...