Slkor SL-FW-TRS-5.5D1 Temperature Sensor Application Solution

To facilitate hardware engineers in making the best use of Slkor products, provide comprehensive technical support, and create value for customers, Slkor introduces the SL-FW-TRS-5.5D1 temperature sensor application solution, including reference circuits and related schemes:

1. The SL-FW-TRS-5.5D1 temperature sensor features high infrared responsivity, excellent repeatability, and high reliability. It is housed in a TO-39 metal can package. Inside the package, it integrates a MEMS thermopile sensor chip and a dedicated signal conditioning ASIC. The ASIC incorporates a 24-bit Sigma-Delta high-precision ADC, a low-noise instrumentation amplifier PGA, and interface circuits, along with a built-in high-precision thermistor chip for ambient temperature compensation.

2. Product Features

2.1 Easy to implement – no user temperature calibration required

2.2 Direct temperature output – no external circuitry needed

2.3 Measurement distance: 30–50 cm

2.4 MEMS thermopile technology

2.5 High responsivity with fast response time

2.6 Standard I²C interface

2.7 TO-39 metal can package

Figure 1

3. Precise temperature control is a critical safeguard for infant feeding. Slkor, with deep expertise in MEMS sensors and infrared temperature measurement as its core technology, brings non-contact measurement, high-precision sensing, real-time response, and intelligent energy-saving capabilities into bottle warmers/mixers, delivering a complete intelligent temperature control solution. This solution enhances product usability and safety redundancy while reducing overall system power consumption through a low-power architecture, providing modern families with a professional yet convenient parenting tool.

Non-contact Measurement: Hygienic, Touchless Sensing

Slkor’s infrared temperature sensor operates on radiation thermometry principles, acquiring milk temperature without physical contact. This approach eliminates cross-contamination paths inherent in contact-based thermometry and removes the maintenance burden of repeatedly cleaning the sensor probe. Users no longer worry about dead spots on the probe or reading drift due to poor contact. This non-invasive measurement paradigm reduces thermal latency and builds a cleaner protective barrier for infant health.

High-Precision Temperature Measurement: Accurate Control, Nutrient Preservation

Milk temperature directly determines nutrient retention and palatability. Slkor’s solution integrates a low-noise PGA, 24-bit Sigma-Delta ADC, and DSP calibration algorithms, ensuring accuracy throughout the signal chain from acquisition to output. Users can finely set target temperatures to suit formula preparation for different age stages – whether for newborn-sensitive formulas or high-nutrition formulas for growing infants – ensuring stable, ideal temperatures for the best feeding experience.

Real-Time Feedback: Dynamic Temperature Visibility

The sensor’s fast thermal response enables real-time temperature updates on the user interface. During mixing, users can continuously monitor the temperature curve on the screen and adjust dynamically as needed. This real-time feedback not only improves temperature control precision but also helps users quickly respond to fluctuations, ensuring the milk remains within the optimal range. Whether rapid heating or constant temperature maintenance, real-time measurement provides a safer and healthier feeding environment.

Intelligent Energy-Saving Temperature Control: Adjust on Reach, Sleep on Standby

The sensor works in deep coordination with the main control system: once the temperature reaches the preset threshold, it triggers power reduction or heating pause, preventing nutrient degradation or scalding risks from overheating. Under standby or low-load conditions, the system automatically switches to low-power mode to minimize wasted energy, balancing cost efficiency and environmental concerns.

Local Alternative: Self-Reliant, Pragmatic Substitution

The infrared temperature measurement market has long been dominated by European and American manufacturers, with German, Belgian and other companies leveraging patent barriers to maintain high pricing, while trade volatility increases supply chain risks for domestic players. Slkor, based on its own technology, achieves core specifications comparable to international mainstream levels and offers customized services including "sensor + algorithm + factory calibration" covering applications from maternal and infant appliances to industrial inspection. This approach optimizes cost structures while flexibly responding to differentiated needs through adaptable production lines, and has already achieved stable mass production in bottle warmers. For OEMs, it adds a reliable domestic option; for consumers, it means better product experience and more reasonable pricing – the value of technological independence ultimately materializes in the products themselves.

4. The following figure shows the connection diagram of Slkor temperature sensor SL-W-TRS-5.5D1 (commercial grade, below 60°C) in a bottle warmer application:

5. The following figure presents the temperature-grade performance parameters of the Slkor SL-W-TRS-5.5D1, classified by detection temperature range into industrial, medical, and commercial grades.

6. More application scenarios for commercial, medical, and industrial grades are shown below:

Slkor temperature sensor alternative brands and model equivalents are shown below:

Slkor Semiconductor will continue to release a series of DEMO application products to facilitate end customers and distributors in using the "slkor" brand’s new products and to strengthen technical support services. Slkor – Chips Driven Future!

Company Profile: The core technical members of Kinghelm and Slkor come from Tsinghua University and UESTC, and also include many overseas returnees. Kinghelm has been deeply engaged in microwave RF technology for nearly 20 years, with a central laboratory in Shenzhen fully equipped for independent R&D and testing, and a production base in Luzhai County, Guangxi, equipped with intelligent production lines capable of high-volume delivery. Products include Beidou/GPS antennas, Bluetooth and WiFi antennas, RF jumper cables, signal connectors, board-to-board connectors, board-end sockets and headers, switch series products, as well as custom medical and automotive wire harnesses, custom probe pins and connectors, and supporting services including drafting, mold development, testing, and mass production. "Slkor, Chips Driven Future" – Slkor treats colleagues and peers with sincerity, continuously driving industry development through new materials, technologies, products, and service models. Slkor’s main products include TVS diodes, transistors, MOSFETs, IGBTs, power management ICs, and three major series, along with new offerings such as Hall sensors, BMS, high-speed optocouplers, and passive crystals. Mr. Song Shiqiang founded Shenzhen Kinghelm Electronics Co., Ltd. and Shenzhen Slkor Semiconductor Co., Ltd. in Huaqiangbei, adhering to the corporate culture of "Integrity, Diligence, Resilience, Detail" and practicing the business ethics of "Fairness, Openness, Cooperation, Win-Win" for steady growth. Kinghelm and Slkor have now developed into globally recognized and reputable brands, serving over 40,000 customers worldwide with products and comprehensive technical services.