GPS Electronic Cargo Seal
A GPS electronic cargo seal for truck doors, trailers and containers. GPS, 4G and Bluetooth sit inside the seal, so each seal is a complete tracker: nothing is installed in the truck, and the load keeps being tracked when it changes tractor or driver.
The seal is the tracker
A truck tracker follows the tractor. When the trailer or container is handed over, the tracker stays behind. A seal with its own GPS goes with the load.
Position on a schedule and on every event
The seal reports at the interval you set — from 10 seconds up — and at once with every locking, unlocking, cut, pry and low-battery event: latitude, longitude, time, lock state and battery.
Cut and pry alarms with position
Cutting the cable or prying the body raises an alarm at once, with time and position, while the vehicle is still on the road.
Nothing installed in the truck
No gateway, no wiring, no tracker in the cab. Fit the seal to the doors and it reports on its own, whoever is driving.
Opened only when authorised
No mechanical key. The seal opens on an AES-128 encrypted, platform-authorised command — from the app over Bluetooth on site, or from the platform over 4G.
Rechargeable cell, swapped in a minute
A standard 18500 lithium-ion cell sits in a bay with a removable cover. A flat cell is swapped for a charged one in about a minute; a built-in capacitor keeps the seal powered meanwhile.
Seating sensor
A sensor confirms the cable is fully home. Closing the cable by hand does not lock the seal: locking goes through the app, so the platform records who sealed it, when and where.
An electronic truck seal for rear doors and trailers
Thread the steel cable through the door handles or hasp of a box truck, a trailer or a container, push it home and tap Lock in the app. The seating sensor confirms the cable, and the platform records the sealing with time and position.
In transit the seal reports where it is and raises an alarm if it is cut or pried. At the destination the receiver unlocks it in the app, or the dispatcher releases it from the platform; the trip closes with its full record: sealing, route, events, release.
- Box-truck and trailer rear doors
- Container doors, through the locking bar
- Cable 380 mm standard; 1.0 m and 1.8 m to order, fitted at the factory
- Your logo, seal numbers and QR codes laser-marked at no charge
Life of one charge by reporting interval
Estimates for a fully charged cell of about 1,400 mAh at 25 °C, good LTE signal and GPS in open sky.
| Position every | Life per charge (estimate) |
|---|---|
| 5 minutes | About 1.4 days |
| 10 minutes | About 2.5 days |
| 30 minutes | About 1 week |
| 1 hour | About 2 weeks |
| 2 hours | About 1 month |
A weak 4G signal and frequent events shorten the life; a cell of higher capacity lasts longer. In practice, fit a charged cell at every sealing and choose the interval so that one charge covers the trip — for example every 5 to 10 minutes on a trip of one to two days. Keep two cells per seal: one in use, one on charge.
| Body | Zinc alloy + ABS + silicone, baked powder resin coating; 66 × 80 × 37 mm without the cable |
|---|---|
| Weight | About 400 g with the standard 380 mm cable |
| Locking member | Steel wire cable, Ø4 mm core (Ø5 mm coated); 380 mm, 1.0 m or 1.8 m |
| Mechanical key | None — the round cover underneath is the battery bay |
| Protection | IP67; −20 °C to +60 °C, 0–90 % RH non-condensing |
| Positioning | GPS on the main board |
|---|---|
| Reporting | Interval set from the platform, from 10 seconds; at once with every event |
| Cellular | 4G LTE Cat 1 bis, LTE only (no 2G / 3G fallback); module version chosen for your country |
| SIM | Standard SIM, fitted inside the seal at the factory |
| Local | Bluetooth 5.0; Android app, iOS coming soon |
| Your server | MQTT or TCP, JSON messages, AES-128 encrypted; or our HTTPS API with webhooks |
| Battery | 18500 rechargeable lithium-ion cell, 3.7 V, button-top, Ø18 × 50 mm |
|---|---|
| Changing the cell | About a minute with the spanner supplied; a capacitor keeps the seal on |
| Charging | Outside the seal, in a standard lithium-ion charger, 0 °C to +45 °C |
| Low battery | Reported to the platform and the app |
| Commands | AES-128 encrypted, authorised by the platform; can be limited in time and revoked |
|---|---|
| Alarms | Cable cut · pry · low battery, with time and position |
| Records | Every locking and unlocking: seal number, operator, time, position — exportable |
See it in action
Frequently asked questions
Can it be used as an electronic truck seal?
Yes. That is what it is built for: box-truck and trailer rear doors, and container doors. The cable goes through the door handles or hasp; check that the Ø5 mm cable passes the holes and that the length spans them before ordering.
Do we need anything installed in the truck?
No. GPS, 4G and Bluetooth are inside the seal, so it reports on its own. If you would rather fit one gateway per vehicle for several seals, see the LoRa seal and vehicle gateway.
What happens without 4G coverage?
The seal keeps the most recent locking, unlocking and alarm events and sends them when coverage returns. Positions are not recorded while there is no signal, so check that the route has 4G coverage.
How is this different from the 4G-BLE-093?
Same body, same cable, same app. The 4G-BLE-093 electronic cargo seal reports events and a daily status and runs over a year on a primary cell; the 4G-BLE-093G adds GPS and reports its position on a schedule, so it runs on a rechargeable cell that is swapped between trips.
Can the seals report to our own system?
Yes. Point them at your own server over MQTT or TCP, take the data from our HTTPS API with webhooks, or use our hosted platform with no platform fee. See Platform & App.
Does the platform alert when a truck leaves its route?
Geofences — origin, destination, customs offices, yards — are standard. Alerts for leaving an approved corridor are not a standard function; they are configured in a project once the route rules are known.
Other seals for the same load
4G Electronic Cargo Seal
Steel-cable seal with its own 4G link. Cut and pry alarms reach the platform in seconds.
Learn more
4G GPS Keypad Padlock
Reports its own position over 4G. Opens with a single-use PIN released by an authorised account.
Learn more
LoRa Smart Padlock
Shackle padlock or cable seal on LoRa. One gateway serves about 50 locks; no SIM in the lock.
Learn morePricing and samples for the 4G-BLE-093G
Tell us the quantity, the country and operator, the door type and the length of a typical trip. We reply within one business day with a quotation and the full specification.