Honeywell 2104B2111 RX SHORT Searchline Excel Short-Range Infrared Gas Receiver

2104B2111 RX SHORT receives the matching transmitter’s infrared beam and processes the sample and reference signals to measure hydrocarbon gas in the optical path. It is the receiver component of a transmitter/receiver system.

2104B2111 RX SHORT is the short-range receiver selection. Honeywell specifies a 5 to 40 m transmitter-to-receiver path for the short-range open-path system.

2104B2111 RX SHORT uses part number 2104B2111, which Honeywell lists as the ATEX Source short-range receiver. The separately listed 2104B2112 is the sink-output selection; match the output type to the controller input.

2104B2111 RX SHORT provides a 4 to 20 mA source output that is linearised over 0 to 5 LEL.m during normal operation. LEL.m represents the gas concentration integrated over the beam path; it is not a point concentration reading.

2104B2111 RX SHORT requires 18 to 32 VDC at the receiver. The official handbook specifies receiver operating power consumption of 8 W maximum and receiver inrush current below 0.6 A.

2104B2111 RX SHORT is aligned to the short-range transmitter using the appropriate telescope and the SHC1 handheld interrogator through the receiver’s RS485 interface. Honeywell requires trained personnel and a clear optical path for commissioning.

2104B2111 RX SHORT has a heated receiver window. Its microcontroller adjusts the heating level according to the window temperature to reduce condensation, frosting and snow accumulation; the optical path must still remain clear.