The **HTS-1E-R** is a specialized high-temperature sensor, typically categorized as a **Surface Mount Platinum Resistance Temperature Detector (RTD)**. These components are designed for precision temperature sensing in environments where stability and a small footprint are required. --- ### 1. Key Technical Specifications The "HTS" series generally refers to High-Temperature Surface-mount sensors. Below are the typical electronic characteristics for this part: | Parameter | Specification | |:---|:---| | **Sensor Type** | Platinum RTD (Thin Film) | | **Resistance at 0°C** | 100 $\Omega$ (Pt100) or 1000 $\Omega$ (Pt1000) | | **Temperature Coefficient** | 3850 ppm/K (Standard DIN/IEC 60751) | | **Operating Range** | -50°C to +400°C (depending on substrate) | | **Tolerance Class** | Class B (±0.3°C at 0°C) or Class A (±0.15°C) | | **Package Style** | SMD (Surface Mount Device) - often 1206 or 0805 | --- ### 2. Electronic Composition The HTS-1E-R is constructed using several layers of materials to ensure accuracy under thermal stress: 1. **Ceramic Substrate:** Acts as the base, providing high electrical insulation and thermal stability. 2. **Platinum Thin Film:** A precise layer of platinum is deposited onto the ceramic. This is the active "sensing" element where resistance changes linearly with temperature. 3. **Glass Passivation:** A protective glass coating covers the platinum film to prevent oxidation and mechanical damage. 4. **Wrap-around Terminations:** Usually consist of a nickel barrier layer with a tin (Sn) or gold (Au) finish to allow for soldering onto PCBs. --- ### 3. Working Principle The part operates based on the **Callendar-Van Dusen equation**. As the ambient temperature rises, the kinetic energy of the platinum atoms increases, causing more collisions with electrons and higher electrical resistance. ```python # Simplified linear approximation for RTD Resistance def calculate_resistance(temp_c, r0=100, alpha=0.00385): """ temp_c: Temperature in Celsius r0: Resistance at 0°C alpha: Temperature coefficient """ return r0 * (1 + alpha * temp_c) # Example: Resistance at 100°C for a Pt100 sensor # R = 100 * (1 + 0.00385 * 100) = 138.5 Ohms ``` --- ### 4. Application Use Cases Because the **-R** suffix often denotes "RoHS Compliant" or "Reel" packaging in electronic components, these are frequently used in automated assembly for: * **HVAC Systems:** Monitoring exhaust gas or heating elements. * **Medical Equipment:** High-precision sterilization monitoring. * **Automotive:** Battery pack thermal management. * **Industrial:** Compensation for cold junctions in thermocouples.