Magnetic BLE Axle Temperature Sensor—Product Overview

I. Product Overview

The Magnetic-Mount BLE Axle Temperature Sensor is a low-power Bluetooth wireless, non-invasive magnetic-mount axle head temperature monitoring device specifically developed for commercial vehicle tractors, trailers, multi-axle freight vehicles, and construction vehicles. It addresses core operational safety hazards such as overheating during long downhill braking, dry friction from dragging brakes, bearing seizure, axle head fires caused by high temperatures, and brake fade. The product utilizes next-generation BLE 5.0 low-energy Bluetooth communication technology, replacing traditional wired RF transmission solutions. Combined with an integrated strong magnetic attachment structure, it requires no drilling, no welding, and no modifications to the axle brake system, enabling truly non-destructive and rapid installation.

The sensor features a built-in high-precision industrial-grade temperature sensing chip capable of continuously and accurately collecting real-time data on trailer axle heads, wheel hubs, brake assemblies 24 hours a day. Through a Bluetooth wireless network, it can directly interface with the vehicle’s main computer, TBOX telematics terminals, in-vehicle displays, and cloud-based management platforms. Designed to handle complex commercial operating conditions—such as drop-and-hook transport, multi-axle trailers, and high-frequency heavy-load operations—it provides precise data support for local driver alerts and remote fleet monitoring, making it a core component for active wheel-end safety protection and digital maintenance upgrades in logistics fleets.

II. System Composition

The entire system features a minimalist architecture, wireless operation requiring no cabling, and strong scalability. Centered around a magnetic BLE axle temperature sensor, it is paired with reception, display, networking, and cloud modules to accommodate various multi-axle monitoring scenarios for tractor-trailer combinations. The core components are as follows:

1. Magnetic BLE Axle Temperature Sensor (Core Data Collection Unit): Features a high-strength alloy sealed housing with IP68 dust, water, and oil resistance, as well as corrosion resistance and tolerance to high and low temperatures. It features a built-in high-strength permanent magnet base that securely attaches to the axle hub, providing shock resistance and preventing detachment. It integrates a high-precision temperature sensor, a low-power BLE Bluetooth communication module, a smart sleep/wake-up module, and a long-lasting lithium-thionyl chloride battery. Responsible for continuous axle temperature data collection and wireless transmission, it serves as the system’s core data acquisition terminal.
2. Bluetooth Receiver Host: Compatible with the 24V voltage of commercial vehicles, it supports simultaneous networking and pairing of multiple Bluetooth devices. It stably receives temperature data from multi-axle sensors throughout the vehicle, automatically demodulates and aggregates data, and filters out electromagnetic interference caused by vehicle operation. This resolves signal attenuation and packet loss issues associated with long vehicle bodies and multiple trailers, ensuring real-time and stable data transmission.
3. On-Board TBOX/Gateway Unit: Supports seamless integration of Bluetooth data with the vehicle’s original TBOX telematics terminal. It fuses axle temperature data with vehicle location and driving data via CAN bus or network protocols for unified upload, establishing a data link between the on-board system and the cloud to meet fleet connectivity and management requirements.
4. Cab Display Terminal: Receives axle temperature data transmitted via Bluetooth in real time, displays temperature readings for each axle head independently, features green, yellow, and red status indicators, triggers audible and visual alarms upon anomalies, and provides high-definition visibility day and night, enabling drivers to intuitively identify faulty axles.
5. Fleet Cloud Management Platform: Receives axle temperature data uploaded by the TBOX to enable real-time temperature monitoring, push notifications for anomalies, data storage and statistics, fault tracing, and maintenance record retention. It supports centralized management of large fleets of vehicles, enabling digital management of wheel-end safety.

III. Core Features

1. Comprehensive, High-Precision Real-Time Axle Temperature Monitoring: Collects temperature data from each axle end, wheel hub, and brake assembly 24/7 without interruption. Supports monitoring across all operating conditions—including high-speed driving, heavy-load braking, idling while parked, and long downhill descents in mountainous terrain. With high measurement accuracy and fast response times, it precisely detects subtle potential faults such as brake heat buildup, bearing wear, and latent brake drag.
2. Multi-Level Intelligent High-Temperature Early Warning and Protection: Equipped with a temperature threshold algorithm specifically designed for commercial vehicles, it supports a three-tier protection system comprising elevated-temperature warnings, high-temperature alerts, and emergency alarms for extreme temperatures. It accurately identifies faults such as dry friction from brake drag, brake sticking, bearing damage, and thermal fade failure, thereby proactively mitigating risks of hub fires, brake failure, and traffic accidents.
3. BLE (Bluetooth Low Energy) Wireless Networking: Utilizes BLE 5.0 low-energy Bluetooth communication, which offers lower power consumption, stronger interference resistance, and more flexible networking compared to traditional RF technology. It supports free pairing and networking of multi-axle sensors, making it suitable for multi-axle trailers and multi-section trailer configurations, with no signal stuttering or data delays.
4. Non-Destructive Magnetic Attachment for Quick Installation and Support for Swap-and-Go Operations: Strong magnets allow for instant, plug-and-play installation without modifying the vehicle’s structure. Installation and removal are convenient, and the devices are reusable, making them perfectly suited for high-frequency swap-and-go logistics operations and trailer swapping scenarios. The devices support one-click Bluetooth pairing and automatic wheel position recognition, eliminating the need for complex recalibration after trailer swaps or position changes, thereby meeting the rapid operational demands of fleets.
5. Smart Sleep Mode for Extended Battery Life: Equipped with vibration-activated wake-up and deep sleep mode when parked, the device automatically activates monitoring while driving and enters power-saving sleep mode when parked. With ultra-low power consumption and an industrial-grade long-life battery, the device can operate for several years without frequent battery replacements, making it ideal for the high-intensity operational demands of commercial vehicles.
6. Multi-Device Data Synchronization and Self-Diagnostics: Supports data synchronization across in-vehicle displays, TBOX cloud connectivity, and mobile apps. The device performs an automatic self-test upon power-up, continuously monitors Bluetooth communication, battery status, and temperature sensor module faults, and automatically logs fault information to facilitate rapid troubleshooting during maintenance.

IV. Product Advantages

1. Non-destructive magnetic mounting, zero modifications, and reusable: The design features a purely magnetic mounting system that requires no drilling, welding, or wiring. It causes no damage to the vehicle’s axles or wheel hubs and does not affect annual vehicle inspections, ownership transfers, or warranty coverage. Sensors can be removed and reused at any time, making them suitable for swap-trailer operations and significantly reducing fleet modification and upgrade costs.
2. BLE Bluetooth Architecture: Stable, Low-Power, and Interference-Resistant: Utilizing next-generation low-energy Bluetooth communication, it offers superior resistance to electromagnetic interference from onboard electronic control systems and generators compared to traditional RF and LoRa transmission. Signal transmission remains stable even on long vehicles with multiple trailers, with no packet loss or connection drops. The ultra-low-power design ensures a battery life far exceeding that of traditional wireless sensors, enabling long-term maintenance-free operation.
3. Rigorous industrial-grade quality, suitable for heavy-duty operating conditions: The entire unit features IP68 dustproof, waterproof, and corrosion-resistant protection. It withstands harsh conditions such as mountainous terrain, rain, snow, mud, water, high-speed exposure to sunlight, high temperatures from continuous braking, and vibrations caused by heavy loads. It is shock-resistant, designed to prevent detachment, and resistant to aging, making it suitable for commercial vehicles operating in all-weather, high-intensity scenarios.
4. Compatible with Vehicle-to-Everything (V2X) and suited for digital fleets: Seamlessly integrates with the vehicle’s original TBOX telematics system to enable integrated management of axle temperature data and vehicle operation data. No need to install a separate gateway; supports vehicle intelligence and connectivity upgrades, meeting fleet requirements for remote monitoring, data traceability, and preventive maintenance.
5. Flexible Networking and Exceptional Versatility: Supports free expansion for single-axle and multi-axle configurations, compatible with 2-axle, 3-axle, and multi-axle trailers of all types. It works with all categories of tractor-trailers—including box, flatbed, tank, flatbed, and refrigerated models—offering high universal compatibility without the need for customization or modification.
6. Proactive Safety Measures to Reduce Costs and Improve Efficiency: Proactively identifies latent wheel-end faults to prevent axle fires, brake failure, and high-speed accidents, thereby reducing operational safety risks; effectively minimizes abnormal wear on brake pads, bearings, and tires, reduces downtime and emergency repair costs, and significantly lowers fleet maintenance and operational costs.

V. Application Scenarios

1. Long-Haul Trunk Logistics: Suitable for long-distance, high-speed trunk transportation with all types of tractor-trailer combinations. It monitors potential hazards caused by heat accumulation at the wheel ends in real time during extended cruising and continuous braking conditions, thereby preventing sudden fires and brake failures during long-haul operations.
2. Heavy-Load Transportation in Mountainous Areas: Suitable for mountainous and hilly routes in Southwest and Northwest China. It specifically addresses high-frequency risks—such as excessive axle temperatures, thermal fade, and brake lockup—caused by frequent braking on long downhill slopes, ensuring safe heavy-load transportation in mountainous regions.
3. Specialized Hazardous Materials Transportation: Designed for hazardous materials tractor-trailers, such as fuel and gas tankers, this system meets the stringent safety standards for high-risk transportation. It monitors axle head temperatures around the clock to eliminate fire and explosion hazards caused by high temperatures, ensuring compliance with operational regulations.
4. High-Frequency Drop-and-Pick-Up Logistics Fleets: Designed for the rotating operation models with multiple tractors and trailers common in logistics parks, ports, and distribution centers. Leveraging its removable, reusable, and automatically network-adaptive features, it perfectly suits the flexible operational scenarios of drop-and-pick-up transportation.
5. Engineering and Specialized Transport Vehicles: Suitable for specialized vehicles such as dump trailers, heavy-haul trailers, and refrigerated trailers. These solutions handle heavy-load operations and complex road conditions, ensuring the safety of high-value cargo and vehicle operations.
6. Smart Upgrades for Traditional Fleets: Designed for commercial vehicles lacking axle temperature monitoring or equipped with outdated, malfunctioning monitoring devices. This non-invasive, low-cost, and highly stable solution rapidly enables the smart and digital upgrade of fleet wheel-end safety systems.

7. Project	Parameters
   Monitoring Method Direct TPMS	Direct TPMS (separate sensor for each wheel)
   Pressure Measurement Range	0–18 bar (higher ranges available upon request)
   Pressure Accuracy	±0.1 bar
   Temperature Measurement Range	-40°C to +125°C
   IP68 / IP69K	IP68 / IP69K
   Communication Method Sensor:	RF 433 MHz/BLE
   ower Supply ECU:	Vehicle DC 9–36 V
   Operating Temperature	–40°C to +125°C
   Wheel Position Expansion	Expandable to 2–108 wheels as needed
   Service Life	Over 5 years