With a built-in Emergency Knock Off Switch (requires 4 sensors, sold separately)

*IMPORTANT NOTE: The M-G03R model will need 4 sensors to operate correctly on two fan systems. Choose between M-ADS20 or M-FPS sensors - sold separately. If you have any questions, please contact Mechline’s Technical Department or contact 01324 829922, an independent Technical Help Line for Mechline’s GIS units.