Market leader in the supply of advanced CCTV and visual imaging systems for difficult or hazardous enviroment.Designers and manufacturers of the IST - Rees and IST - Quadtek range of imaging systems for inspection, surveillance and monitoring in hazardous, high - temperature industrial environments. Our monitoring, CCTV imaging systems are used in the nuclear (power generation, reprocessing and decommissioning), cement, pulp and paper cement, gas oil coal, petrochemicals and waste incineration industries.