The Merlin 1650+ is able to work in conjunction with a Merlin Carbon Dioxide detector. If a Carbon Dioxide detector is fitted and a pre-determined level of CO2 is detected, a signal will be sent to the 1650+ panel which will send the panel into alarm and close the gas solenoid valve. The valve cannot be reset until the CO2 reaches an acceptable level. The Merlin 1650+ can be interfaced with building management systems and fire alarm systems to isolate the gas supply in event of a fire. More Features Unique internal visual display showing the fan current. Allows Compliance with BS6173 for commercial kitchens. To be used when all appliances have flame failure devices. 2 built in current monitors can be easily calibrated to suit any fan. Reliable method of interlock, with no moving parts there is little to go wrong. BMS and fire alarm interface. Will accept remote and emergency knock-off buttons Can monitor up to 0.1 to 18 amp running current (per fan monitor) Carbon Dioxide detectors accepted. Calibration ranges to cover a wide variety of fans. Covered by S&S Northern Ltd 3-year warranty.