Features: Adopted epoxy resin sealing structure, making it shockproof and temperature-resistant, suitable for installation and use in harsh environmental conditions. Installed in the junction box of thermal resistance and thermocouple on site to directly output 4-20mA and 0-10mA signals, saving costs and improving anti-interference capability during long-distance signal transmission. High precision, low power consumption, wide operating temperature range, stable and reliable performance. Adjustable range with enhanced linear function; thermocouple temperature transmitter includes cold-end automatic compensation. Suitable for a wide range of applications, can be used with thermocouples and thermal resistors in field installations, or integrated into testing equipment as a functional module. Specification: Input: Thermal resistance Pt100, Cu50, Cu100 (two-wire, three-wire, four-wire) Thermocouple: K, E, S, B, T, J, N (two-wire) Intelligent input signal and range can be configured via PC or handheld controller. Output: 4-20mA DC signal output linearly proportional to the resistance output of thermal resistance or input temperature signal; linear to the millivolt input of thermocouple or its temperature input signal. Basic error: 0.2%, 0.5% Transmission mode: two-wire, three-wire, four-wire system Transmitter operating power supply: 24V DC Load: Maximum load resistance calculated by formula RL(Max) = 50 × (Vmin - 12). At 24V, load resistance up to 600Ω. Rated load: 250Ω. Note: For adjustable range transmitters, zero and full-scale must be adjusted repeatedly when changing ranges. Thermocouple transmitter requires 30 minutes of preheating before calibration. Environmental temperature effect: 0.05% per °C Normal operating conditions: A. Ambient temperature: -25°C to 80°C B. Relative humidity: 5% to 95% C. Mechanical vibration: 55Hz amplitude