The CEL4 multipoint gas detection panel supports up to 4 remote sensors in any gas combination using a 4-wire RS-485 communications network. The CEL4 offers installers a wide variety of outputs including relays for fan activation and a proportional 4-20 mA signal for variable control and monitoring by a building automation system. The panel has a digital readout indicating gas concentrations in PPM for each point and LEDs for fan trigger and alarm levels.