GL520MG

Queclink GL520MG — LTE Cat M1 Asset Tracker with 7-Year Standby and Environmental Monitoring

The Queclink GL520MG is one of the most capable and energy-efficient asset trackers in the Queclink range — built on Queclink's innovative power management technology to deliver up to seven years of standby time from user-replaceable CR123A lithium batteries.

IP67 waterproof, rapid to deploy and packed with built-in environmental sensors, the GL520MG is designed for large-scale asset monitoring deployments where maintenance windows are limited and reliability in harsh conditions is essential.

What sets the GL520MG apart from standard asset trackers is its combination of built-in temperature and light sensors alongside GPS tracking.

Temperature monitoring makes it directly suitable for cold chain logistics and cargo condition monitoring without additional accessories.

The light sensor detects unauthorised opening or tampering with packaging, triggering immediate alerts when concealed cargo is exposed. Combined with a 3-axis accelerometer for motion detection and optional BLE 5.0 for wireless sensor connectivity, the GL520MG is a genuinely multi-purpose environmental and location monitoring device.

As an authorised Queclink distributor in the UK, Tracking Hardware UK stocks the GL520MG and ships directly from our London warehouse — with trade pricing available for logistics operators, cold chain managers, asset tracking companies and resellers.

Key Features

• Up to 7-year standby time — one of the longest battery lives of any device of its size, powered by user-replaceable CR123A lithium batteries that can be swapped in the field without returning the device for servicing

• LTE Cat M1 and NB2 with 2G fallback — global LTE connectivity with unique antenna solution ensures reliable data transmission across the UK and internationally, with 2G fallback in areas of limited LTE coverage

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

• 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 and high-value asset protection

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

• Motion detection and automatic mode switching — intelligent power management switches between active and dormant modes based on motion, maximising battery life across extended deployments Optional

• BLE 5.0 — connects to Bluetooth Low Energy sensors and accessories for extended environmental and asset monitoring capabilities

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

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

• Up to 10,000 buffer messages — stores data locally when out of network coverage and transmits on reconnection, ensuring no data is lost during transit through low-coverage areas

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

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

• Optional SVR protocol support — supports Queclink's stolen vehicle recovery protocol for SVR applications

Technical Specifications

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

GNSS: u-blox All-in-One GNSS receiver — GPS, GLONASS, Galileo, BeiDou Bluetooth: Optional BLE 5.0

Battery: User-replaceable CR123A lithium pack

Standby time: Up to 7 years (1 report per day with GNSS on)

Internal sensors: Temperature, light, 3-axis accelerometer

Waterproofing: IP67

Buffer messages: Up to 10,000

Operating temperature: -40°C to +85°C

Mounting: Clip-on, optional magnetic case

Typical Use Cases

Ideal for cold chain logistics requiring temperature and location monitoring, cargo and container tracking with tamper detection, warehouse and yard asset management, trailer and semi-trailer tracking, high-value static asset monitoring over extended periods, pharmaceutical and food logistics requiring condition monitoring, large-scale IoT deployments where low maintenance and long battery life are essential, and animal collar tracking applications.

Frequently Asked Questions

How long does the GL520MG battery last?

The GL520MG provides up to seven years of standby time when reporting once per day with GNSS active — one of the longest battery lives of any device of its size. Battery life varies depending on reporting frequency, motion activity and network conditions. The CR123A lithium batteries are user-replaceable in the field without returning the device for servicing.

Does the GL520MG monitor temperature without additional sensors?

Yes — the GL520MG has a built-in internal temperature sensor, making it suitable for basic cold chain and cargo condition monitoring straight out of the box without additional accessories. For more precise temperature measurement, the optional BLE version supports external BLE temperature probes.

What does the light sensor do?

The built-in light sensor detects when packaging, a container or a housing is opened and exposed to light. This triggers an immediate tamper alert, making the GL520MG particularly effective for monitoring concealed cargo where unauthorised access must be detected instantly.

What is the optional magnetic mounting case?

The optional magnetic mounting case allows the GL520MG to be rapidly attached to any metal surface without tools. It also features automatic mode switching — the device automatically changes between active and dormant modes when the magnet is attached or removed, further extending battery life during storage and non-operational periods.

Does the GL520MG require a SIM card?

Yes — the GL520MG 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 asset tracking deployments.

Can I buy the GL520MG 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.