Temperature Sensors & Controllers

Temperature sensors and controllers are critical components of drying/evaporation tunnel systems that monitor thermal conditions and maintain precise temperature setpoints. Sensors detect real-time temperature at various points along the tunnel, while controllers process this data and adjust heating elements or cooling systems to achieve consistent drying/evaporation rates, prevent product damage, and ensure energy efficiency. These components are typically installed in industrial machinery used for drying or evaporating processes, such as in food processing, chemical manufacturing, or material treatment. The sensors are available in various configurations, including thermocouples, RTDs (resistance temperature detectors), and thermistors, each with specific characteristics suited to different temperature ranges and environmental conditions. The controllers use advanced algorithms, such as PID (proportional-integral-derivative) control, to maintain the desired temperature profile. They receive signals from the sensors, compare them to preset values, and output control signals to actuators like heaters or valves. The system operates within a temperature measurement range of -40 to 85 °C, with an accuracy of ±0.5 °C for Pt100 sensors, and a response time of ≤5 seconds. The supply voltage is 24 V DC ±10%, and the output signal is a 4-20 mA analog current loop. Control accuracy is ±0.1% of full scale. Operating pressure ranges from 1.0 to 1.6 MPa, and operating humidity is up to 95% RH (non-condensing). The ingress protection rating is IP54 to IP65, suitable for industrial environments. The sensor element material is stainless steel 316L, and the process connection is a NPT thread size of 1/2 to 1 inch. The weight varies from 0.5 to 2.0 kg depending on configuration. These components are designed for reliable performance in demanding industrial settings, with materials such as stainless steel housing, platinum or copper sensing elements, ceramic insulation, and electronic components. It is essential to verify model-specific values and standards with the legal manufacturer or supplier before procurement, as the listed parameters are typical reference ranges and may vary for specific applications.

Temperature sensors (typically thermocouples, RTDs, or thermistors) convert thermal energy into electrical signals. Controllers receive these signals, compare them to preset values, and output control signals to actuators (like heaters or valves) using PID algorithms to maintain desired temperature profiles throughout the drying/evaporation process. The sensors are placed at strategic points along the tunnel to provide accurate temperature readings. The controller processes the input and adjusts the heating or cooling elements to minimize deviation from the setpoint, ensuring consistent process conditions. The system operates within specified ranges for temperature, pressure, and humidity, and is designed to respond quickly to changes, with a response time of ≤5 seconds. The control accuracy is ±0.1% of full scale, ensuring precise regulation. The components are built to withstand industrial environments, with ingress protection up to IP65 and corrosion-resistant materials.