MANSI CLS Series closed loop system optimally controls LPG/CNG supply to the air-fuel mixer depending on value of exhaust lambda. The air fuel ratio(AFR) is efficiently controlled to minimize emissions, maximize efficiency and improve mileage. This product features extremely rugged and compact construction. Made out of heat resistant material, these AFR controllers are suitable for use in engine compartment and weatherproof casing and seals and multilayer conformally coated electronics ensures superior performance in harsh conditions. Features include mixture type indicator lights that indicate whether the instantaneous air-fuel mixture is lean, rich or stochiometric. Models can be chosen for mounting under dashboard or inside engine compartment.