High-temperature radar sensors are designed for reliable level and distance measurement in furnaces, kilns, molten metal vessels, and other extreme environments. Their technical parameters determine accuracy, safety, and service life. Key specifications include operating temperature range, often from -40 degC to 200 degC, with special versions rated up to 600 degC or higher using cooling structures and ceramic antennas. Frequency band is typically 26 GHz, 80 GHz, or 120 GHz; higher frequencies provide narrower beams and better resolution but require careful window design. Measurement range may reach 0.2-30 m or more, depending on antenna and process conditions. Accuracy is commonly +/-1-5 mm, while resolution can be 1 mm. Beam angle ranges from 3 deg to 12 deg, affecting installation clearance and false-echo suppression. Response time is usually 0.1-1 s for dynamic control. Process connection and housing materials, such as stainless steel, PTFE, and ceramic, resist corrosion and thermal shock. Protection ratings of IP67/IP68 and pressure ratings from 0.1 to 4 MPa ensure robust operation. Outputs include 4-20 mA, HART, RS485/Modbus, and relay contacts. Power supply is 24 VDC or 220 VAC. EMC, vibration, and surge protection must meet industrial standards. Repeatability is often +/-0.5 mm, and long-term stability supports continuous process monitoring. Accurate parameter selection ensures stable signals, low maintenance, and long-term performance in high-temperature radar sensing. Safe design.