Siemens AG 3RX2-110 Sonar-Signal Evaluator Module

The Siemens 3RX2-110 Sonar-Signal Evaluator is a 24 V DC ultrasonic signal processor that converts echoes from Siemens Sonar sensors into a reliable analog reading for distance or presence sensing in automation systems. It includes a built‑in monitoring module and temperature compensation, delivering millimetre-level resolution to improve measurement stability in variable environments. Designed to work with Siemens Sonar‑BERO sensors (for example the 3RG family), the unit can operate in multiplex mode with two sensors and supports a calibration option to refine accuracy across multiple channels. In Siemens literature, the 3RX2‑110 family is described as a standard‑design device with an integrated analog output, with variants such as 3RX2110‑1A for Ultrasonic Signal Evaluator 2, commonly used in Siemens NS K 2000 and related sonar installations. Typical applications include precise short‑range measurement for level and distance sensing, as well as general presence detection in industrial automation, where the evaluator’s processed signal feeds control logic or alarm systems.