Short Product Summary：
1，The ST-209 Temperature Transmitter is designed for high-accuracy, reliable temperature measurement in demanding industrial environments. Built with high-purity imported Pt100 / Pt1000 RTD sensor elements, high-reliability amplification circuitry, and advanced digital non-linear signal processing, the ST-209 converts thermal readings into precise analog and digital signals.
2，Featuring versatile output options (4–20mA, 0–10VDC, RS485 Modbus, I2C) and a rugged Hirschmann connector with an IP-rated waterproof, breathable design, the ST-209 ensures long-term stability and effortless integration across industrial fluids, HVAC systems, and automated processing equipment.
Key Features & Benefits：
1，Premium Pt100 / Pt1000 Sensor Element: Incorporates imported platinum RTD cores to deliver high sensitivity, excellent linearity, and precision thermal sensing across extreme operating conditions.
2，Digital Temperature Compensation & Linearity Correction: Advanced digital calibration and active non-linear correction technology ensure exceptional signal accuracy and ultra-low drift over the full temperature range.
3，Versatile Signal Outputs: Supports standard 2-wire 4–20mA, 0–10VDC, RS485 (Modbus-RTU), and I2C output options for seamless integration with PLCs, temperature controllers, and IoT platforms.
4，Custom-Molded Hirschmann Plug with Breathable Membrane: Features an IP-rated waterproof and breathable connector design, offering full compatibility with standard Hirschmann and HTP sockets for broad industrial adaptability.
5，Superior Electrical Performance & Long-Term Stability: Engineered for high noise immunity (EMI/RFI protection) and high thermal vibration resistance to ensure uninterrupted industrial operation.
6，Customizable Process Connections & Probe Lengths: Offers flexible thread styles (e.g., G1/4", NPT1/2", M20×1.5) and customizable probe insertion lengths to fit diverse thermowells and piping systems.
Industrial Applications
1，HVAC & Environmental Systems: Air handling units, industrial chillers, and large-scale refrigeration equipment.
2，Water Supply & Fluid Systems: Variable frequency drive (VFD) pumps, water treatment plants, and constant-pressure supply networks.
3，Petrochemical, Energy & Metallurgy: Pipeline temperature monitoring, power plant generators, and chemical process control.
4，Compressors & Industrial Automation: Air compressors, hydraulic power units, and automated machinery temperature control.