The OVEN TRM202-N.RR is a two-channel measuring and regulating thermoregulator produced by OVEN Production Association LLC, one of Russia's leading manufacturers of industrial automation and process control instruments. The device features two independent universal input channels that accept a wide range of temperature sensors — resistance thermometers (RTDs) and thermocouples covering ranges from −200°C to +2500°C — as well as analog current signals (0…5 mA, 0…20 mA, 4…20 mA) and low-level voltage signals, enabling two sensors of entirely different types to be connected simultaneously.
The N.RR modification is housed in a wall-mount enclosure measuring 130×105×65 mm with IP44 protection, powered from a broad AC supply of 90 to 245 V at 47–63 Hz. Its two relay output devices are each rated at 8 A / 220 V (cosφ > 0.4), capable of directly switching heating or cooling actuators.
A built-in RS-485 port supports the OVEN proprietary protocol as well as Modbus RTU and Modbus ASCII at data rates from 2.4 to 115.2 kbps, enabling integration into SCADA systems and industrial networks. Measurement accuracy reaches ±0.25% for resistance thermometers and ±0.5% for other signal types, with a 1-second polling cycle.
The unit carries a Russian type-approval certificate for measuring instruments and is recognized in Kazakhstan and Belarus, with a standard verification interval of one year.
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