Queclink GL520MG
Queclink GL520MG LTE-M/NB-IoT asset tracker with replaceable CR123A batteries, temperature and light sensors. Compare GNSS and Cell ID standby modes.

Queclink GL520MG — Product and Deployment Information
The GL520MG supports long-standby asset monitoring with replaceable batteries and internal environmental sensors. Select a GNSS or Cell ID reporting plan against the information your project needs. Confirm network coverage, the supplied variant and mounting accessories before ordering.
Technical Specifications
Cellular: LTE Cat M1/NB2 with quad-band EGPRS fallback. Confirm the supplied band set and local operator service.
Positioning: u-blox all-in-one GNSS receiver; Cell ID reporting is a separate mode with different location information.
Battery: Three CR123A lithium cells; the linked datasheet specifies a 1,400mAh battery pack. Follow the approved replacement procedure.
GNSS standby estimate: Up to 5 years at one report/day with GNSS on in the linked datasheet.
Cell ID standby estimate: Up to 7 years at one report/day using Cell ID only. Reporting frequency, coverage and active sensors affect runtime.
Dimensions and weight: 87 × 51 × 30 mm; 140g. Magnetic mounting version: 87 × 51 × 33.5 mm; 160g.
Operating temperature: −20°C to +60°C in the linked document.
Enclosure: Manufacturer GL520MG literature lists IP67. Confirm the supplied enclosure and installation requirements.
Internal sensors: Temperature, light and 3-axis motion sensing. Confirm measurement accuracy, placement and alert settings for your project.
Bluetooth variants: BLE is optional within the GL520MG family. Confirm the exact hardware, firmware and accessory support; do not assume every unit has BLE.
Mounting: Clip-on mounting options and an optional magnetic bracket; confirm suitable surfaces and included hardware.
Buffer and geofences: Up to 10,000 buffered messages and 20 geofences.
Integration and approvals: TCP, UDP and SMS. Confirm SIM, platform and regional approvals; certification is marked TBD in the linked document.
Frequently Asked Questions
Does GL520MG provide seven years of GNSS tracking?
The linked datasheet distinguishes up to 5 years at one daily report with GNSS on from up to 7 years using Cell ID only. These are standby estimates; frequent reports, network conditions and sensor use affect runtime.
How does GL520MG differ from GL521MG?
GL520MG uses replaceable CR123A batteries. GL521MG uses a rechargeable Li-Polymer battery and Qi wireless charging. GL520MG Bluetooth support depends on the selected variant.
Does every GL520MG include Bluetooth?
No. BLE is an optional family configuration. Confirm the exact model, firmware and accessory protocol before selecting a sensor or driver-identification keypad.
Can I use the internal temperature sensor for my project?
It provides internal temperature monitoring. Check the measurement point, required accuracy, calibration and alert workflow for the cargo or asset; an internal reading is not automatically the temperature of the goods.
Is the magnetic bracket included?
Magnetic mounting is optional. Confirm the bracket, attachment surface, installation method and supplied parts in your quote.
How can I check availability and request a quote?
Request a quote with the quantity, destination, platform and accessories. We will confirm stock, pricing and dispatch timing for your project.
Product Documentation
Specifications follow the linked manufacturer document. Confirm the supplied revision, configuration and accessories before ordering.
