PREFACE Acorn Controls offers H2 Sensor with Catalytic Pellistor based Hydrogen Gas measurements. ? Proven Catalytic combustion sensor ? State of art technology sensor ? Long sensor life > 2years, zero maintenance ? Low power, Three wire device ? Quick Response / Ceiling mount design ? 4% H2 ranges- balance air : H2SENSE-CC2410-4 ? 2% H2 ranges- balance air : H2SENSE-CC2410-2 ( on special request )