Why do ordinary door sensors fail en masse when temperatures drop?​— Unfazed by extreme cold and snow! Low-temperature 4G door sensors designed for outdoor power distribution cabinets safeguard electrical security.​In electrical security and maintenance scenarios, outdoor distribution boxes and cabinets are exposed year-round to harsh open-air environments. They must withstand severe frost, sudden temperature swings, unmanned operation, and risks such as unauthorized access. In northern regions during winter—or in remote, wind-swept locations—ordinary security door sensors often malfunction, lose signal, or stop detecting altogether. This makes it impossible to monitor the status of cabinet doors in real time, creating opportunities for equipment theft, cable damage, and potential power failures, which severely disrupt maintenance operations.To meet the demanding operating conditions of outdoor electrical equipment, we have launched a specialized low-temperature 4G door sensor for outdoor distribution cabinets. With industrial-grade cold resistance, stable data transmission, and intelligent monitoring functions, it provides comprehensive protection for outdoor power distribution assets—even in the harshest climates.Why Do Door Sensors Fail En Masse in Cold Weather?​— And How to Solve ItSo, what exactly causes door sensors to fail in groups? Based on real-world usage experience, the root causes generally boil down to two main factors.Reason 1: The Battery ⚡ — Cold weather drains its strength and reduces performanceLow temperatures leave the battery “too weak to work,” significantly impairing its performance.Chemical reactions slow down:​ In cold environments, the electrolyte thickens or even partially solidifies, slowing ion movement and sharply reducing chemical activity.Internal resistance increases:​ Resistance inside the battery rises, resulting in lower output voltage and reduced usable capacity.Overall capacity drops:​ Electrode materials contract in low temperatures, reducing the amount of storable energy and lowering total charge.Reason 2: The Magnet 🧲 — Ordinary magnets temporarily lose strength in freezing conditionsStandard magnets become “listless” in low temperatures, weakening their magnetic force.Loss of magnetic strength:​ Cold suppresses certain magnetic domains, causing a temporary drop in magnetism. This affects coordination with the reed switch and may lead to switching failure.Material limitations:​ Most door sensors use ferrite magnets, which are highly sensitive to low temperatures. For example, at –5°C, magnetic strength may decrease by approximately 30%.Is There a Product Designed Specifically for These Challenges?​Yes—there is.To address these pain points, Shenzhen Hengyi Technology​ has launched a Low-Temperature Door Sensor​ built for extreme environments.Power Supply:​ Uses a constant power source instead of batteries, completely eliminating concerns about cold-induced battery failure.Probe Magnet:​ Equipped with a neodymium‑iron‑boron (NdFeB) rare-earth magnet, unlike conventional ferrite magnets, capable of operating in temperatures ranging from –40°C to +110°C.Host Electronics:​ Industrial‑grade electronic components rated for –40°C to +85°C, ideal for the wide temperature fluctuations common in northern China.Key FeaturesHardcore Cold-Resistance Configuration for All Outdoor Low-Temperature Conditions​Unlike consumer-grade or standard industrial sensors, this model is purpose-built for extreme cold. It integrates industrial-grade cold-resistant components, high-precision reed switches, and high-strength magnetic assemblies to overcome the industry-wide challenge of cold-weather device failure.Operating temperature range: –40°C to +80°C​Performs reliably in sub-zero northern winters, extreme day-night temperature swings, frost, snow, and high-wind environments.No magnetic failure, circuit faults, freezing, or disconnections caused by low temperatures.Highly Sensitive Detection & Ultra-Low Power Consumption​Normally-closed switch design:​ The circuit closes instantly when the magnet approaches.Detection distance:​ ≥ 70 mm under interference-free conditions, ensuring fast, accurate response without lag or false alarms.Power consumption:​ Strictly controlled below 3 W, supporting 24/7 continuous operation with minimal maintenance—perfect for long-term unmanned outdoor power distribution applications.2. 4G Wireless Smart Transmission — Real-Time, Precise Cabinet Status Monitoring​Outdoor power distribution cabinets often face challenges such as difficult wiring, scattered installation points, and complex maintenance workflows. To address these pain points, this low-temperature door sensor integrates a 4G wireless communication module, freeing installation from the constraints of wired cabling and enabling deployment in various outdoor environments—whether in remote fields, urban streets, or industrial zones.Data is transmitted via the reliable MQTT protocol, ensuring that cabinet

The air quality monitoring of the garbage transfer station adopts advanced gas sensors and monitoring technology, fixed installation, and comes with a large flow suction pump. It can remotely extract gas from confined spaces for detection and real-time display, with threshold alarm and linkage with relevant purification equipment for air purification treatment. Adapt to environments such as garbage plants, septic tanks, underground pipelines, sewage wells, etc. that are closed for a long time.

This product is an outdoor gateway based on low-power wide area network LoRaWAN protocol. It adopts an IP66 waterproof shell, powered by PoE, and can connect to standard LoRaWAN terminals for bidirectional communication. The data collected by the gateway is uploaded to the cloud server via 4G/5G or Ethernet. It can be widely used in various fields such as remote meter reading, intelligent parking, smart cities, security and fire protection.

SM-WLC801 is the development of the world's first SoC chip that supports the LoRa protocol, based on ST's latest release. It has the characteristics of long communication distance, low standby power consumption, strong anti-interference ability, and universal interface. The wireless communication module has a small external size, rich interface resources, is easy to integrate and develop, and supports user secondary development.

Small size, high performance Exquisite and compact appearance, using millimeter wave radar for distance measurement, with high sensing accuracy. ABS material, lightweight and durable The shell is made of high-quality ABS flame retardant material, which is lightweight, dustproof, heat-resistant, easy to clean, and not easily worn. Imported chips, stable and reliable Industrial grade imported chips, with high measurement accuracy, wide range, can work stably for a long time, and strong reliability. Strong anti-interference ability and long measurement distance Not easily affected by light, dust, dirt, and interference from signals in the same frequency band, and measuring at a long distance. Ultra low power consumption, safe and harmless The product adopts an ultra-low power consumption solution, with a radiation level only one tenth of Bluetooth, which is harmless to human safety.

Various communication interfaces The device has communication interfaces such as 4G, RS485, LoRa, network port, etc. Display and record data Display the data measured by the access device in real time, save the data in the SD card, and give a line graph. Data reporting platform Data can be reported to the platform through the communication interface. Using imported chips Using imported ARM dual-core CPU, the main frequency is up to 1.2GHz.

Small size, high performance Exquisite and compact appearance, using millimeter wave radar for distance measurement, with high sensing accuracy. ABS material, lightweight and durable The shell is made of high-quality ABS flame retardant material, which is lightweight, dustproof, heat-resistant, easy to clean, and not easily worn. Imported chips, stable and reliable Industrial grade imported chips, with high measurement accuracy, wide range, can work stably for a long time, and strong reliability. Strong anti-interference ability and long measurement distance Not easily affected by light, dust, dirt, and interference from signals in the same frequency band, and measuring at a long distance. Ultra low power consumption, safe and harmless The product adopts an ultra-low power consumption solution, with a radiation level only one tenth of Bluetooth, which is harmless to human safety.

In the field of artificial intelligence, everyone has been focusing on the intelligence of image algorithms. In fact, sensor perception is the cornerstone of artificial intelligence, providing a lot of useful data for human engineering intelligence. Currently in the field of artificial intelligence, sensor data and AI algorithms are separated

It is used in computer rooms in various industries such as government, electric power, telecommunications, medical care, railways, military, enterprises, education, and the Internet to provide support for various types of business. The computer room is composed of key equipment such as computers, servers, network equipment, and storage, as well as infrastructure such as power supply systems, refrigeration systems, cabinet systems, fire protection systems, and monitoring systems. It is the core department of these units. Aiming at the hidden safety hazards in the operation and maintenance of the computer room, this solution centrally monitors and manages power, environment, network, security, etc., so as to improve the operation and maintenance efficiency and ensure the safety of the computer room.

In the past few years, there have been many gas leakage and explosion accidents, which have caused huge losses to people's lives and properties. If gas leakage can be detected in time, the explosion can be prevented. The following are two of the many gas accidents in 2021, and many more, which can be found in the website and newspaper news.