GL521MG

Queclink GL521MG — LTE Cat M1 Asset Tracker with Qi Wireless Charging, BLE and 7-Year Standby

The Queclink GL521MG is the rechargeable evolution of Queclink's popular GL520MG — built in direct response to customer demand for a rechargeable version of the GL500MG series without compromising the waterproof and robust enclosure. The GL521MG adds Qi wireless charging and BLE connectivity while retaining all the features that made the GL520MG a market leader — LTE Cat M1 and NB2 with 2G fallback, IP67 waterproofing, built-in temperature and light sensors, 3-axis accelerometer and up to 7 years standby time.

The addition of Qi wireless charging means the GL521MG can be recharged at a depot or yard without breaking the IP67 seal — simply place the device on a compatible wireless charging pad and it charges through the sealed enclosure, maintaining full waterproofing throughout. BLE connectivity extends sensor and accessory support, allowing connection to a wide range of wireless accessories for enhanced environmental and asset monitoring.

As an authorised Queclink distributor in the UK, Tracking Hardware UK stocks the GL521MG and ships directly from our London warehouse — with trade pricing available for logistics operators, cold chain managers, asset tracking companies and resellers.

Key Features

• Qi wireless charging — recharge the device without opening the sealed enclosure, maintaining IP67 waterproofing integrity throughout the charging process — ideal for depot and yard recharging workflows

• LTE Cat M1 and NB2 with 2G fallback — global LTE connectivity with unique antenna solution, with automatic fallback to 2G where LTE is unavailable, ensuring reliable data transmission across the UK and internationally

• Up to 7-year standby time — one of the longest battery lives of any device of its size, with intelligent power management extending deployment life significantly

• IP67 waterproof — fully sealed enclosure rated to IP67, suitable for outdoor installation, industrial environments and all UK weather conditions

• BLE connectivity — connects to Bluetooth Low Energy sensors and wireless accessories for extended environmental monitoring and asset management capabilities

• Built-in temperature sensor — monitors ambient temperature during transit and storage for cold chain logistics, refrigerated cargo and pharmaceutical monitoring without additional accessories

• Built-in light sensor — detects when packaging or housing is opened or exposed to light, providing immediate tamper alerts for concealed cargo protection

• 3-axis accelerometer — detects asset movement and vibration, triggering wakeup and reporting when assets are moved and returning to sleep when stationary to maximise battery life

• Optional magnetic mounting case — allows rapid tool-free attachment to any metal surface, with automatic mode switching triggered by magnet attachment and removal

• Flexible clip-on mounting — unique clip-on design allows secure attachment to a wide variety of asset types including trailers, containers, pallets, equipment and animal collars

• Up to 10,000 buffer messages — stores data locally when out of network coverage and transmits on reconnection

• Geofencing — configurable zone alerts when the device enters or exits defined areas Low battery alarm — alerts when battery level falls below a configured threshold

• OTA updates — remote firmware and configuration management without physical device access

GL521MG vs GL520MG — Which Should You Choose?

Both the GL521MG and GL520MG share the same IP67 waterproof enclosure, LTE Cat M1/NB2 connectivity, temperature and light sensors, 3-axis accelerometer and up to 7-year standby time. The GL521MG adds Qi wireless charging and BLE connectivity — making it the better choice for deployments where regular recharging at a depot is practical and wireless accessory connectivity is needed. The GL520MG uses user-replaceable CR123A batteries — making it the better choice for remote long-term deployments where recharging infrastructure is not available. Contact us for guidance on which suits your specific deployment.

Technical Specifications

Cellular: LTE Cat M1 / NB2 with 2G GPRS fallback

GNSS: u-blox All-in-One GNSS receiver — GPS, GLONASS, Galileo, BeiDou Bluetooth: BLE

Charging: Qi wireless charging

Internal sensors: Temperature, light, 3-axis accelerometer

Standby time: Up to 7 years

Waterproofing: IP67 Dimensions: 87 x 51 x 30mm (87 x 51 x 33.5mm with magnetic case)

Buffer messages: Up to 10,000 Operating temperature: -40°C to +85°C

Typical Use Cases

Ideal for cold chain logistics requiring temperature and location monitoring with depot recharging, cargo and container tracking with tamper detection, warehouse and yard asset management, trailer and semi-trailer tracking, high-value static asset monitoring, pharmaceutical and food logistics requiring condition monitoring, large-scale IoT deployments requiring rechargeable long-life devices, and animal collar and livestock tracking.

Frequently Asked Questions

What is the difference between the GL521MG and the GL520MG? The GL521MG adds Qi wireless charging and BLE to the GL520MG. Both share the same IP67 enclosure, sensors and LTE connectivity. Choose the GL521MG if regular recharging at a depot is practical and BLE accessory support is needed. Choose the GL520MG if you need user-replaceable batteries for remote long-term deployments without recharging infrastructure.

How does Qi wireless charging work on the GL521MG?

The GL521MG charges via Qi wireless charging through the sealed enclosure — simply place it on a compatible Qi wireless charging pad. This means the device can be recharged without opening or breaking the IP67 waterproof seal, maintaining full protection throughout.

Does the GL521MG monitor temperature without additional sensors?

Yes — the GL521MG has a built-in internal temperature sensor for basic cold chain and cargo condition monitoring straight out of the box. The BLE interface also supports connection to external BLE temperature probes for more precise measurement.

Does the GL521MG require a SIM card?

Yes — the GL521MG requires a SIM card with LTE Cat M1 or NB2 capability and 2G fallback. It is not supplied with a SIM. Contact us for SIM recommendations for UK and international deployments.

Can I buy the GL521MG in bulk from Tracking Hardware UK?

Yes — we supply logistics operators, cold chain managers, asset tracking companies and resellers across the UK and internationally. Volume pricing and trade accounts are available. Contact us for a bulk quote.