The WD620 is part of the XYR 5000 family of wireless products. These transmitters cover a wide differential pressure range, and can be used to monitor a variety of processes and assets in hazardous and remote areas. The WD620 can be set to operate in four modes: differential pressure, orifice flow, open channel flow, and level. Since there are no wires to run, the transmitter can be installed and operational in minutes, quickly providing information about the variable being monitored. The Smart Response Manager allows the transmitter to adapt to changing process conditions, allowing greater visibility to process variation. Smart Response Manager allows the user to set thresholds which, when exceeded, cause the transmitter to adjust sampling and data transmission rates.

The transmitter combines a differential pressure sensor with a Radio Frequency (RF) transceiver that communicates in a digital protocol, using Frequency Hopping Spread Spectrum (FHSS). FHSS ensures data integrity by continually switching the carrier wave over a wide range of frequencies. Power is supplied by a C size 3.6 V lithium battery, with an expected lifetime of up to five years.