Addressable interface for monitoring of analogical signal of 4-20mA deriving of flammable or toxic gas detectors. Includes a dedicated directionning (1-99) and is connected directly to an analogical communication loop of PEARL centrals, occupies 1 sensor direction. Can be programmated and display 4 differents status: PR AL1, PR AL2, AL1 and AL2. Requires extern power supply of 15-30VDC. Requires an activation license for each PEARL central.