Petrol / CNG / LPG selection 7 Segment LED display Non dispersive Infrared (NDIR) technology Automatic condensate discharge Automatic zero calibration Digital span calibration Easy update of software in the field through USB port DC operation facility available for “mobile road tests” using vehicle battery isplay of Lambda / AFR / PEF Separate Indication for battery Low / High voltage Electronic leak check facility Gas scrubber for cleaning of impure particles Conforms to ISO 3930 NOx measurement (Optional).