There are many variations in the detailed technologies available to meet vehicle COLPRO requirements. MDH Defence has wide experience in specifying correct vehicle fits. Key solutions vary from major systems for comprehensive protection against a broad range of threats, to smaller packs concentrating on specific hazards.

The Vickers Challenger 2 main UK battle tank uses a 340m3 hr-1 NBC system incorporating the standard 170m3 hr-1 composite filter conforming to NATO standards.

The filter system is designed to filter out both biological and chemical agents to a very high level. The Challenger 2 NBC system also incorporates the MDH inertial separator (cyclone) which is the first stage dust separator, and a control box fitted with a membrane keyboard giving clear and accurate system information. As with other important sub-systems, the COLPRO equipment needs to be fully integrated for optimum operational effectiveness. MDH Defence has had many years practical, effective experience of systems integration with Vickers Defence Systems.


The prototype Hagglund CV90s for the Swedish Army were fitted with 170m3 hr-1 NBC systems designed and developed by MDH Defence. These systems operate in conjunction with a water to air heat exchanger and include face mask, purge, and ventilation (NBC by-pass) modes.




The first stage filter (cyclone) removes coarser particles with the second, Ultra High Efficiency (UHE) stage, removing the finer particles. This second stage filtration system protects crews against dust, smoke, biological and nuclear hazards, and some crowd control agents. The final anti-vapour stage ensures removal of toxic vapours.

MDH DEFENCE Walworth Road Andover SP10 5AA Tel:  +44 (0)1264 835888 Fax: +44 (0)1264 835889 Website: www.mdh-defence.com Email:     tim.knight@bioquell.com Contact:  Mr Tim Knight (Sales and Marketing Director)