The **RTS-3B1-R/E** is a high-performance **Resistance Temperature Detector (RTD) Sensor** typically used in industrial automation, HVAC systems, and precision thermal monitoring. This model is known for its durability and high-accuracy sensing capabilities. --- ### 1. Technical Specifications The core electronic components of the RTS-3B1-R/E revolve around its platinum sensing element and its physical construction. | Parameter | Specification | | :--- | :--- | | **Sensing Element** | PT100 (Platinum 100 Ohms at 0°C) | | **Configuration** | 3-Wire System (compensates for lead resistance) | | **Accuracy Class** | Class A or Class B (Standard tolerance) | | **Temperature Range** | Typically -50°C to +200°C (Probe dependent) | | **Probe Material** | Stainless Steel (Corrosion resistant) | | **Mounting** | Threaded fitting or insertion probe | --- ### 2. Key Electronic Components #### A. The PT100 Sensor Element At the heart of the device is a platinum film or wire. As temperature increases, the electrical resistance of the platinum increases in a predictable, linear fashion. * **Nominal Resistance:** 100 $\Omega$ at 0°C. * **Coefficient:** 0.00385 (Standard European Curve). #### B. 3-Wire Compensation Circuit The "3-wire" designation is critical for electronic accuracy. * **Function:** It uses a third wire to measure the resistance of the lead wires themselves. * **Benefit:** The control system subtracts the lead resistance from the total measurement, ensuring that the reported temperature is based solely on the sensor tip, even with long cable runs. #### C. Insulation and Housing * **MgO Insulation:** The internal element is often packed with Magnesium Oxide (MgO) powder to provide high thermal conductivity while ensuring electrical isolation from the outer sheath. * **Lead Wires:** Usually PTFE (Teflon) or Fiberglass insulated, providing resistance to moisture and chemical exposure. --- ### 3. Connection Diagram Concept When integrating the RTS-3B1-R/E into a PLC or Temperature Controller, the wiring follows this logic: ```mermaid graph LR A[Terminal 1: Red] --- B[Positive Excitation] C[Terminal 2: Red] --- D[Sense/Compensation] E[Terminal 3: White] --- F[Negative Return] ``` *Note: Two wires of the same color are internally connected to one side of the resistor to facilitate lead-wire compensation.* --- ### 4. Applications * **HVAC:** Monitoring air duct or water pipe temperatures. * **Industrial Processing:** Monitoring heat sinks in power electronics. * **Food & Beverage:** Precise temperature control in pasteurization or storage.