The WN571 Acoustic Transmitter is part of the XYR 5000 family of wireless products. It is used to monitor applications that may generate high frequency noises when they malfunction, such as pressure relief valves, steam traps, and compressor/pumps. The transmitter is acoustically coupled to the process equipment being measured, and can be configured to detect abnormal asset conditions. The unit also contains a built-in temperature sensor to monitor ambient temperature. The Smart Response Manager allows the transmitter to adapt to changing process conditions, allowing greater visibility to process variation. The Smart Response Manager allows the user to set thresholds which, when exceeded, cause the transmitter to automatically adjust sampling and data transmission rates.

The transmitter combines a reliable ultrasonic 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.