Quick Answer: A thermistor is a temperature-sensitive resistor whose electrical resistance changes predictably as temperature varies—with 3-5% sensitivity per degree Celsius, making it 10× more responsive than RTDs for precision measurement. What Is a Thermistor?  The Essential Definition A thermistor (thermal + resistor) is a passive semiconductor component whose electrical resistance varies significantly and predictably with temperature changes. Unlike standard fixed-value resistors, thermistors exhibit resistance changes of 3-5% per degree Celsius—making them 10 times more sensitive than RTDs (Resistance Temperature Detectors) for precision temperature measurement and control.

Hefei, China – January 2, 2026 – Focus Sensing and Control Technology Co., Ltd. (Focusens), a leading ISO-certified manufacturer of temperature sensors, humidity sensors, and level sensors, has successfully completed its comprehensive annual inventory audit during the final weekend of 2025. This strategic operation marks a pivotal step toward enhanced operational efficiency as the company prepares to launch an advanced production management system in early 2026. Strategic Timing: Customer-First Approach During Holiday Season The inventory audit, conducted December 27-28, 2025, was strategically scheduled during the Christmas and New Year holiday weekend to minimize disruption to customer operations. With the majority of Focusens' global clients in North America and Europe observing year-end holidays, the timing ensured seamless continuity of service while allowing the internal team to conduct thorough inventory verification. "This decision reflects our core principle of putting customer needs first," explained a Focusens warehouse supervisor. "By conducting the audit when our clients are offline, we maintained our commitment to uninterrupted service delivery while preparing our systems for future growth." Team Dedication: 30+ Employees Drive Operational Excellence More than 30 team members from multiple departments participated in the two-day inventory count, demonstrating exceptional dedication by volunteering their weekend time. The cross-functional collaboration ensured comprehensive accuracy in cataloging thousands of sensor components, including NTC thermistors, PTC thermistors, RTD sensors, and digital temperature sensors across the company's production facility in Hefei's High-Tech Zone. The intensive audit covered Focusens' complete product line: Temperature sensing components (NTC, PTC, RTD sensors ranging from -200°C to 850°C) Humidity transmitters and monitoring systems Level sensors and proximity switches Cable harnesses and wire assemblies for automotive and industrial applications To support the team's commitment, Focusens management provided refreshments, catered lunch, warm beverages, and appreciation gifts, fostering a collaborative atmosphere that transformed the demanding task into a shared mission of operational excellence. Digital Transformation: Foundation for New Management System The 2025 inventory data will serve as the baseline for Focusens' new digitalized manufacturing and warehouse management system, scheduled to launch January 1, 2026. This technology upgrade represents a significant investment in operational modernization, designed to enhance: Real-time inventory visibility across all product categories Enhanced traceability for quality control and regulatory compliance Improved supply chain responsiveness for faster customer delivery Data-driven decision making for production planning and resource allocation "Inventory is not just about counting items; it's about building the data foundation for smarter operations,...

Happy New Year 2026 | Focusensing 2025 Achievements & Outlook body {font-family: Arial, sans-serif; line-height: 1.6; color: #222; max-width: 950px; margin: auto; padding: 24px;} h1, h2, h3 {color: #0a3c6e;} .lead {background: #f4f8fc; border-left: 4px solid #0a5fae; padding: 16px; margin-bottom: 20px;} .section {margin-bottom: 30px;} .chart-placeholder {background: #f9f9f9; border: 1px dashed #c0cbd3; padding: 32px; text-align: center; margin: 24px 0; color: #666;} ul {margin-left: 20px;} Warm New Year wishes from Focusensing – reflecting on key 2025 milestones and sharing our outlook for 2026 in sensor innovation and industry growth. Warm Wishes and Reflection As we step into 2026, everyone at Focusensing extends sincere New Year greetings to our customers, partners, and collaborators worldwide. Your continued trust and collaboration have helped drive our achievements through 2025, and we look forward to even stronger cooperation and innovation in the year ahead. 2025 Achievements: Product Innovation and Reach In 2025, Focusensing continued to expand its portfolio and global presence with advancements in temperature sensing technology across several key product categories: Broad Temperature Sensor Portfolio Thermistors (NTC/PTC/LPTC/PPTC): High-precision components for thermal measurement and control RTD Sensors: Platinum-based RTD solutions for industrial accuracy and stability. Thermocouples & Digital Sensors: Solutions suited for harsh and high-temperature environments. Temperature & Humidity Transmitters: Integrated environmental monitoring modules. Level/Position Sensors: Reed-switch based solutions with temperature integration. Our products serve five major industry lines including household appliances, automotive (including EV and BMS), medical, IoT, and industrial automation. Global Engagements and Export Growth Focusensing participated in multiple international sensor and automation exhibitions in 2025, strengthening relationships with global partners and expanding our distribution network to over 60 countries. Quality and Manufacturing Excellence Focusensing’s manufacturing adheres to ISO 9001:2015 quality standards and comprehensive 6S on-site management. All products comply with ROHS and REACH directives for reliable performance in diverse applications. Industry Trends in 2025: Market Growth & Data Market Growth of Temperature Sensors The temperature sensors industry continues to grow rapidly. In 2025, the overall temperature sensor market is forecast to reach approximately USD 11.21 billion, with projections rising to over USD 20.96 billion by 2034 at a compound annual growth rate (CAGR) of ~7.2 %. This reflects strong demand across automation, energy, automotive and IoT sectors. Chart A: Global Temperature Sensor Market Size & Forecast (2025–2034) Growth of Thermistor and RTD Segments The thermistor temperature sensor market (which includes NTC and PTC devices) is projected to grow with notable CAGR through 203...

Real Data: Comparing ±0.3 °C vs ±1.0 °C Sensors in Energy-Intensive Buildings 1. Temperature Accuracy: The Invisible Backbone of Indoor Comfort Central air conditioning in homes and businesses offers comfort that goes beyond just temperature. This sentence discusses how consistently and accurately someone keeps the environment. The human body can sense temperature changes as small as 0.3 °C. This is especially true in places like offices, hotels, and luxury homes. When a thermostat or sensor is off by 1.0 °C, the system overreacts — this causes uncomfortable temperature changes, wastes energy, and leaves people unhappy. That's why the difference between a ±1.0 °C sensor and a ±0.3 °C sensor is important — crucial for any serious HVAC or Smart HVAC system. 2. Homogenized HVAC Market Needs Real Differentiation Today, many HVAC systems offer similar core features — heating, cooling, and basic automation. In a crowded and similar industry, what makes a system stand out is what it senses — including the accuracy of the TemperatureSensor. High-precision sensors, often underestimated, directly impact system responsiveness, energy usage, and long-term performance. The following real-world examples highlight the performance gap. Real-World Case Studies: Performance Gains from Precision Sensors Case Scenario What Changed After Upgrading to ±0.3 °C Sensors Residential Villa – Vancouver, Canada High-end villa installation 31% reduction in climate-related complaints; lower system cycling frequency; homeowner comfort rated 4.7/5 Hospital HVAC Retrofit – Seoul, South Korea Operating rooms / medical-grade HVAC Achieved ±0.2 °C environment stability; HVAC fluctuations reduced by 42%; better compliance with medical-grade standards Office Complex – Munich, Germany Commercial office HVAC ±1.0 °C → ±0.3 °C: 9.5% annual energy savings (~€18,000); improved employee productivity; HVAC downtime reduced by 17% 5-Star Hotel Chain – Singapore Guest rooms & hospitality HVAC Improved “room climate” review scores; lower chiller workload during peak months; ~US $11,000 annual savings per property Industry reports show that a misreading of just 0.5 °C can cause energy overuse — up to 8% — in energy-intensive zones like commercial kitchens and data centers. Precision — not just features — underlies real energy efficiency and comfort. 3. Five Smart Ways to Build HVAC Differentiation in a Saturated Market Use high-accuracy sensors (±0.3 °C or better) — reduces energy waste while improving occupant comfort. Integrate with IoT & BMS platforms — real-time sensor feedback enables predictive control and smarter climate regulation. Zone-based temperature mapping — personalized comfort per room or zone enhances occupant satisfaction and efficiency. Pair temperature sensors with smart humidity sensors — prevents mold, discomfort, and reduces maintenance costs. Focus on retrofit-friendly and scalable design — systems compatible with existing infrastructure are easier to deploy ...

What Are RTD Sensors and Why Wire Configuration Matters Resistance Temperature Detectors (RTDs) are sensors that measure temperature by correlating the resistance of a sensing element with temperature. When selecting an RTD sensor, the wiring configuration — 2 wire RTD, 3 wire RTD, or 4 wire RTD — is critical. The way each configuration handles lead-wire resistance can drastically affect measurement accuracy. 2-Wire RTD Configuration How the 2-Wire RTD Works This is the simplest wiring configuration. Two wires connect the RTD element to the measuring device, which reads the total resistance of the circuit. Diagram (2 wire RTD PT100 / PT1000): shows lead wire resistance adding to the sensor resistance and the basic temperature measurement principle. Limitations The lead-wire resistance adds to the sensor’s resistance — causing a higher than accurate temperature reading. The longer the wires, the larger the error. Therefore, 2 wire RTD is only suitable for applications with very short lead wires and where high precision is not required. 3-Wire RTD Configuration (Most Common Industrial Option) Why 3-Wire Is Popular The 3 wire RTD configuration is the most widely used RTD wiring method in industrial settings. It offers a good balance between cost and measurement accuracy. Diagram (3 wire RTD PT100 / PT1000): shows how equal lead-wire resistances are presumed and canceled out to improve measurement accuracy. Compensation Principle The 3-wire method uses a third wire to measure the resistance of a single lead wire and then compensate accordingly. The measuring device sends a current through a loop consisting of the RTD element and two wires — measuring total loop resistance. Using the third wire, it measures the resistance of one lead. By subtracting twice that single-wire resistance from the total loop resistance, the lead-wire error can be effectively canceled out. 4-Wire RTD Configuration (Highest Accuracy) Why 4-Wire Provides Peak Precision For the highest measurement accuracy, a 4 wire RTD configuration is the optimal choice. It effectively eliminates the influence of lead-wire resistance on temperature readings. Diagram (4 wire RTD PT100 / PT1000, Kelvin connection): shows highest-precision temperature measurement with lead-wire resistance eliminated. Compensation Principle The 4-wire wiring employs a four-terminal (Kelvin) measurement method. One pair of wires supplies a constant, precise current to the RTD element. The other pair connects directly across the element to measure the voltage drop. Since the voltmeter input has very high internal impedance, virtually no current flows through the voltage-sensing leads—and thus their resistance has negligible effect. Using Ohm’s Law (R = V / I), the device calculates the RTD’s true resistance accurately — regardless of lead-wire length or condition. Which RTD Wiring Method Should You Choose? Scenario / Accuracy Requirement Recommended RTD Configuration Non-critical use, low precision requirement 2-Wi...

Choosing the right probe temperature sensor is about more than just accuracy and range. The type of output signal is also important. It affects your whole system design. As a maker of many types of sensors, we understand the importance of knowing the signal type. We offer classic NTC thermistors, RTDs (PT100/PT1000), and modern sensors like DS18B20 and TMP117. Understanding the signal type is the first step to success. Analog vs Digital Temperature Sensors: What's the Difference? The Analog Approach: The Raw Signal Analog sensors are the "classic" solution. They provide a continuous signal — typically a change in resistance or voltage — that is proportional to the temperature. Resistive Sensors: This group includes our NTC thermistors and RTDs (PT100/PT1000). As temperature changes, their electrical resistance changes in a predictable way. Voltage Sensors: Devices like thermocouples and the LM35 sensor fall here. They output a small, continuous voltage (e.g., 10mV per °C for the LM35) that corresponds to the temperature. This raw signal is vulnerable to electrical noise and requires external circuitry. Your microcontroller cannot directly measure resistance. You need to create a conditioning circuit, like a voltage divider or amplifier. Then, use an Analog-to-Digital Converter (ADC) to change the signal into a value your system can understand. Best for: Cost-sensitive designs, high-resolution analog systems, and applications where you fully control the signal conditioning. The Digital Approach: The Smart Sensor Digital sensors are "smart" devices. They are integrated circuits (ICs). These ICs have an analog sensor, signal conditioning, an ADC, and digital communication logic all in one small package. DS18B20 (using the 1-Wire protocol) and TMP117 (two-wire, SMBus, and I2C interface-compatible) are prime examples. When you "talk" to these sensors using their digital protocol, they don't send you a raw, noisy voltage. They send you a fully processed, calibrated, and precise temperature reading in binary. The benefits are huge: Noise Immunity: The digital signal is highly resistant to electrical noise, even over long wires. Ease of Use:No intricate wiring or adjustments required.. Just connect it to the digital pins of your microcontroller.. Scalability: You can often put multiple digital sensors on the same communication bus. Best for: Applications requiring high accuracy with minimal design effort, noisy electrical environments, and systems using microcontrollers. Which Sensor Output Is Right for You? The choice is simple: Do you need a basic, flexible part for a custom analog design (NTC/RTD)? Or do you want a smart, noise-resistant sensor that provides a direct temperature reading (DS18B20/TMP117)? Whatever your application, we Focusens manufacture high-quality sensors you need to get the job done. Sensor Type Output Type Signal / Interface Typical Accuracy External Circuitry Needed? Key Feature / Best For NTC Thermistor Analog (Resistive) Resis...

Why Threaded RTD Probes Matter in 2026 In today’s industrial and process-control world, threaded RTD probes remain one of the most reliable, cost-effective ways to measure temperature. With 2026 approaching, demands for precision, durability, and smart integration are higher than ever. Whether your system is in power generation, HVAC, chemical processing, or IoT sensor networks, the right threaded RTD probe is critical. At Focusensing, we’ve seen how mounting thread type, installation depth, lead-wire configuration, and material choice can make or break system reliability. This guide is designed to provide you with clear criteria, tips and understanding—so you can confidently select a threaded RTD probe that works in your application. What Is a Threaded RTD Probe? An RTD (Resistance Temperature Detector) probe uses a metal element (often platinum) whose electrical resistance changes predictably with temperature. When a probe is described as “threaded”, it means the probe body has a screw-thread fitting (such as ½″-14 NPT, ¾″-14 NPT, or metric threads) which allows direct mounting into a process port, thermowell, or machine housing. Threaded RTD probes offer advantages in secure mounting, process sealing, and easier replacement or calibration. For example, the WR Series industrial RTD probes catalogue (June 2025) shows threaded connections such as ½″ × ½″ NPT and ½″ × ¾″ NPT as standard options. wahlmanuals.s3.amazonaws.com Key Specifications & Materials You Need to Know When comparing threaded RTD probes, several specs loom large: Thread / Mounting Common threads: ½″-14 NPT, ¾″-14 NPT, 1/2″ BSP, metric M20×1.5, etc. The 2025 order guide from Wahl lists threads A-G including ½″×½″ NPT and ½″×¾″ NPT. wahlmanuals.s3.amazonaws.com Thread type affects how the probe engages the process port or thermowell. Improper thread size could cause leaks or poor thermal contact. Element Type & Accuracy Class Many probes use platinum elements (PT100, PT1000). Accuracy classes like Class A, Class B according to EN 60751. Example: A miniature surface-mount threaded stud RTD sensor uses PT100 Class A, −70 °C to +260 °C, accuracy ±0.15 °C. hgsind.com Sheath/Body Material & Environment Stainless steel (304, 316) are common for industrial use; some custom probes offer corrosion-resistant alloys. EI Sensor’s threaded RTD specs show stainless steel housings with specific tolerances and 200 °C max operating temp for some models. EI Sensor Technologies Lead-Wire Configuration 2-wire, 3-wire, 4-wire configurations: for greater accuracy, 3 or 4 wires reduce lead-resistance error. Short leads, correct insulation materials (PTFE, FEP), are essential for harsh environments. Insertion Depth & Response Time The insertion depth (how far the probe extends into the process or thermowell) affects response time and accuracy. For example, a product guide says tip-sensitive probes with screw threads may have typical time constants around 1.5–2.0 seconds in moving wat...

Why This Matters in 2025 In 2025, temperature sensing plays an increasingly critical role across many fields — from electric vehicles to industrial automation, from HVAC systems to consumer devices. Two sensor technologies keep showing up in design spreadsheets and engineering specs: thermocouples and thermopiles. Understanding their differences can save you time, money, and performance headaches. Your company, Focusensing, pairs its sensor solutions with deep expertise in both types (and offers optimized products where fewer trade-offs are needed). What Is a Thermocouple? A thermocouple is one of the oldest and most used ways to sense temperature. At its simplest: two different metal wires are joined at one end (the “hot junction”), and the other ends form a reference (or “cold junction”). When the hot junction experiences a different temperature than the reference, a small voltage is generated (thanks to the Seebeck effect). Key traits of thermocouples: They are often capable of very high temperature measurement (some types go beyond 1000 °C). They are robust, simple, and can be made compact. Their output voltage is quite low (micro-volts to millivolts), which means the measurement system must handle small signals carefully. They are typically “contact” sensors — the junction must touch or be embedded in the medium whose temperature is being measured. 3. What Is a Thermopile? A thermopile takes the thermocouple idea and amplifies it. Instead of a single junction pair, a thermopile uses many thermocouple junctions (often in series) so their voltages add up. Key traits of thermopiles: Because many junctions are combined, they generate a higher output voltage (compared to a single thermocouple). Many thermopiles are designed for non-contact measurement (via infrared radiation) or small temperature differentials. They tend to be more complex in packaging and design, because the junctions are arranged and must be thermally isolated and managed. 4. Key Differences: Thermocouple vs Thermopile Here’s a side-by-side comparison to clarify when each technology makes sense: Feature Thermocouple Thermopile Construction One pair of dissimilar metals (junction) Many thermocouple junctions in series/parallel Output Voltage / Sensitivity Low (µV-mV) per degree Higher cumulative voltage output Temperature Range Very wide (including very high temps) Generally used for moderate temps or non-contact gradients Contact vs Non-Contact Usually contact sensor Often non-contact or radiation-based sensor Complexity & Cost Simple, lower cost More complex, higher cost Typical Applications Furnace, engine exhaust, direct immersion IR thermometers, thermal imaging, micro-temp sensing Can you directly swap one for the other? Not really — the measurement method and signal electronics differ. Practical Applications & Use-Cases When to choose a thermocouple High-temperature industrial furnace or kiln where you need direct measurement at 1000 °C+ Engine exhaust sensors in ...