GPS Tracking with Temperature Sensors for Reefer Trailers

Cold chain monitoring

Protect temperature-sensitive cargo on every route

A GPS tracker with a temperature sensor records where a reefer trailer is and how cold the cargo is, minute by minute. Top Tracking System puts that on one dashboard with your GPS fleet tracking and ELD, sends an alert the moment temperature drifts out of range, and keeps the trip log you need for FSMA and a rejected-load claim.

Explore Our Products
Cargo temperature
Continuous logging for reefer trailers
Live GPS tracking
Location and temp on one dashboard
Out-of-range alerts
Act before the load is lost

What Top Tracking System temperature sensors do

  • Live location

    Every reefer on one map in real time, so dispatch can reroute around delays and give receivers accurate ETAs.

  • Continuous temperature logging

    A wireless probe reads the trailer air or return-air temperature every few minutes and stores it, so you have a full record, not spot checks.

  • Out-of-range alerts

    Set a high and low limit per load and get a text the moment the trailer drifts past it, while there is still time to fix the reefer.

  • Geofencing alerts

    Draw a zone around a DC, cross-dock, or customer and get an alert when a trailer arrives or leaves, day or night.

  • Trip and temperature history

    Replay any run with location and temperature side by side, including door-open events, to show a receiver the load stayed in spec.

  • Speed alerts

    Get flagged when a truck exceeds a set limit or the posted road speed, data a CSA review and a crash lawyer both check.

  • Maintenance reminders

    Schedule tractor and reefer-unit service by engine hours or odometer, so a PM is never missed.

How temperature monitoring works, in 3 steps

Mount the GPS, place the probes, then watch temperature and location from the same dashboard.

  1. 01

    Install the sensors

    The GPS unit mounts on the tractor and wireless probes go in the trailer, one per zone for multi-temp loads.

  2. 02

    Data transmission

    Location and temperature readings go to the cloud over cellular, and store on the device through any dead zone.

  3. 03

    Fleet monitoring

    The dashboard shows live temperature and location per trailer, sends out-of-range and door-open alerts, and exports the trip temperature report for a shipper or a claim.

Why fleets choose Top Tracking System for cold chain monitoring

We are a small US-based company built around trucking technology. The difference shows up in 3 places: the support you reach, the contract you sign, and the number of vendors you manage.

Top Tracking System — Smarter Tracking, Stronger Results

Focused on trucking since 2016. Temperature and fuel sensors, GPS, ELD, and cameras are all we build.

Truck Tracking Device | Top Tracking Solutions

One platform, one bill. Temperature sensors, GPS, ELD, and cameras run on the same dashboard, not 3 or 4 logins.

Live tracking Device | Top Tracking Solutions

Support you can reach. Phone, email, and WhatsApp from a US-based team, on a month-to-month plan.

Tracker System Inspection | Top Tracking Solutions
FAQs

Temperature sensor questions carriers ask before they buy

Straight answers on reefer control vs monitoring, probe placement, rejected loads, FSMA, and adding sensors to trailers you already track.

It monitors, it does not control. The sensor logs the actual trailer temperature and alerts when it drifts out of range, but it does not change the reefer set point. You get an early warning to act before the load is lost, plus a record of what the trailer actually held.

Ready to protect every reefer load?

Talk with our team about temperature probes, GPS trailer units, and the trip logs shippers ask for.