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

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.

Our company integrates 5G, 4G, NB-IOT, LORA WAN and other wireless communication technologies, and combines cloud storage and local distributed storage technology to ensure data reliability and stability

Mass concrete, English is concrete in mass. my country's "Construction Standard for Mass Concrete" GB50496-2018 stipulates that the minimum geometric size of concrete structures is not less than 1m. Concrete that causes harmful cracks due to temperature changes and shrinkage is called mass concrete. During mass concrete pouring, temperature monitoring is very important. When the temperature change exceeds the national standard, appropriate measures should be taken to cool down.

The standard curing room is dedicated to the constant temperature and humidity standard curing of concrete test blocks and cement test blocks. The standard curing room conforms to the latest national standards. It has a wide range of uses and great promotion value in highway transportation, railways, bridges, civil buildings, water conservancy, hydropower, and scientific research units.

From the second half of 2020, under the condition that the coverage of 4G/5G mobile communication base stations is relatively complete, operators will gradually suspend the access of 2G terminals to the network. China Unicom, Telecom began to terminate the service of 2G base station. Several major operators have put their energy on emerging new mobile IoT technologies such as CAT1 and NB. Among them, CAT1 is a low-speed 4G Internet of Things solution, which can use the existing mobile base station, without the need to build a new mobile network base station, and can perfectly replace the existing GPRS communication module.

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. At present, in the field of artificial intelligence, sensor data and AI algorithms are separated.

With the rapid development of my country's economy, waterway transportation has become increasingly busy, waterway grades have been continuously improved, and ship density and loading height have also increased accordingly. These factors have increased the risk of ships hitting bridges. Many railway bridges were built at an early age and the bridge body is low, which is very prone to ship-bridge collision accidents. When an ultra-high vessel collides with a bridge illegally, the bridge displacement and the shortening of the bridge life may occur, and the bridge displacement will easily lead to vicious accidents such as bridge collapse.