With experience extending back to the 1988 Montreal Protocol, no other fixed monitoring system manufacturer can claim a greater history dedicated to the research, manufacture, sales and service of refrigerant gas monitoring systems. Today, the Thermal Gas Systems Haloguard® product brand has come to mean proven reliability worldwide – designed and constructed to withstand tough mechanical room requirements. We invite users at all levels, including System Engineers, Mechanical Contractors, Facility Managers, Chiller Equipment Manufacturers and Distributors to experience our personalized customer service and support.