Reefer temperature monitoring

For refrigerated trailers, I’d look at connected reefer-monitoring systems rather than standalone temperature loggers:

• Samsara Reefer Monitoring — real-time temperature/humidity, alerts, GPS, historical records, door/cargo sensors, and two-way control of supported Carrier/Thermo King units.www.samsara.com
• Motive Reefer Monitoring — wireless sensors, up to six zones per trailer, real-time alerts, historical logs, and Carrier/Thermo King integrations.helpcenter.gomotive.com
• ORBCOMM ReeferTrak — specialized reefer platform with two-way monitoring/control and multi-zone support.www2.orbcomm.com

For most fleets: choose a system with cellular connectivity, independent in-trailer sensors, configurable excursion alerts, GPS/geofencing, door monitoring, and downloadable compliance records.

If you tell me how many trailers, typical temperature range, and whether you use Carrier or Thermo King, I can narrow this to the most suitable options and estimated costs.

Real-time telematics platforms like Geotab and Radius (Stratus 79) combine live GPS location tracking with automated reefer temperature alerts. These solutions integrate directly with the trailer's refrigeration unit (such as Carrier or Thermo King) to track internal box conditions and location simultaneously.[geotab.com](https://www.geotab.com/blog/reefer-trailer-temperature-monitoring/)[[2](https://www.radius.com/en-us/telematics/temperature-monitoring)](https://www.radius.com/en-us/telematics/temperature-monitoring/)

Top Solutions for Combined GPS and Reefer Monitoring

• Geotab Cold Chain Management : Provides an open platform supporting flexible sensor integration, customizable temperature deviation alerts, and compliance reporting.[geotab.com](https://www.geotab.com/blog/reefer-trailer-temperature-monitoring/)
• Radius Stratus 79 : Connects directly to Carrier or Thermo King reefer units via a specialized cable to pull real-time box temperature, set point, ambient air, and GPS location data.[geotab.com](https://www.radius.com/en-us/telematics/temperature-monitoring/)
• Top Tracking System : Combines real-time GPS fleet tracking with instant out-of-range temperature alerts and FSMA-compliant trip logs.[geotab.com](https://toptracking.com/service/gps-tracking-with-temperature-sensors/)
• Digital Matter : Offers low-power GPS asset tracking paired with wireless temperature sensors to monitor detached or yard-parked refrigerated trailers.[geotab.com](https://www.digitalmatter.com/blog/trailer-temperature-monitoring-gps-sensor-systems-for-cold-chain-visibility)

Key Features to Look For