The radio receiver is used in conjunction with compatible transmitters for mobile or stationary measurement of physical quantities. By utilizing cutting-edge radio technology operating at an industrial frequency of 868.4 MHz, the installation effort is significantly reduced. Wired connections can be eliminated, and the wireless sensor technology operates effectively even in harsh industrial environments. The included Lambda/4 antenna with an impedance of 50 Ohms can be directly screwed on or mounted externally. When using the optionally available antenna wall mount with a 3-meter antenna cable, the free field range is 300 meters. The measured values received from the transmitter are processed in the receiver, displayed, and are available as linear current or voltage signals (0(4) to 20 mA, 0 to 10 V) and via the digital RS485 interface. All four analog outputs of the receiver are galvanically isolated. Through the digital interface with Modbus protocol, integration with higher-level systems, such as plant visualization software or Modbus master-capable chart recorders, is possible. Operation and configuration can be done via the keyboard in conjunction with a two-line LCD display or more conveniently through a setup program. This allows for separate parameter settings for each channel, such as filter constants, offsets, alarms, and peak hold (minimum and maximum value storage). For this purpose, there is a connector on the front for a PC interface with TTL/RS232 or USB/TTL converter to connect the receiver to a PC. The receiver is housed in a DIN rail enclosure designed for mounting on a 35 × 7.5 mm DIN rail according to DIN EN 60715. The screw terminals for electrical connections are arranged in different levels. The maximum wire cross-section can be 2.5 mm². The power supply is provided through a connection to AC 110 to 240 V +10/-15%, 48 to 63 Hz.