Reefer Monitoring

Reefer monitoring is the continuous tracking of temperature and humidity conditions inside refrigerated trailers and trucks to protect cargo quality and maintain cold chain compliance. Fleets face a number of challenges with managing reefers:

• Preventing product spoilage is a challenge, as even minor temperature deviations can result in significant financial losses, especially when transporting high-value, temperature-sensitive cargo like food, pharmaceuticals, and medical supplies.

• Identifying and resolving reefer issues before they escalate is difficult without remote visibility, making problems like faulty sensors, fluid leaks, or equipment failures harder to catch before they cause costly repairs, unplanned downtime, or compromised cargo.

• Meeting cold-chain compliance requirements can be complex, as manually tracking temperatures and maintaining audit-ready records increases the risk of reporting gaps, regulatory fines, and rejected loads.

Samsara is the one-stop shop for reefers, providing real-time, continuous temperature and humidity data across every cold-chain asset in the fleet. With Samsara, you can catch temperature issues to avoid load spoilage, eliminate manual pre-cooling and reduce engine run time, optimize reefer fuel usage, schedule reefer PMs on actual runtime, and stay compliant. Samsara’s Smart Trailer Reefer solution offers:

• Full trailer functionality: Monitor and control their reefers directly within the Samsara platform using powerful OEM API integrations and advanced features, including real-time visibility, reporting, ATIS, ABS, integrated workflows, trailer mismatch, and more.

• OEM API integrations: Samsara offers a direct API Thermo King integration, featuring two flexible integration paths (wired and OEM API) and full 2-way control. Samsara also offers an OEM API integration for Carrier that provides monitoring and 2-way control. 

• Environmental Monitoring: With precise sensors and an easy-to-install wireless design, Samsara Environmental Monitor is ideal for ensuring food safety and product integrity during transportation, monitoring warehouse conditions, and other applications that rely on environmental data to ensure quality or maintain compliance.

Food distributors are required under the FDA Food Safety Modernization Act (FSMA) to maintain documented temperature controls, continuous monitoring, and accessible records throughout the cold chain. Samsara simplifies FSMA compliance through:

• Automatic temperature logging that generates audit-ready records without manual data entry.

• Digital reporting that makes records available on demand for FDA audits or customer inspections.

• Environmental Monitors (EM Series) providing continuous, real-time temperature and humidity visibility across every reefer and trailer in the fleet.

Cargo spoilage most often results from temperature deviations, humidity, or contaminations that go undetected until delivery. Cargo spoilage results in increased costs and inefficiency for distributors, retailers, and shippers. 

With Samsara’s Smart Trailer Reefer solution, fleets can catch temperature issues before they lead to load spoilage. With live zone-specific temperature visibility, instant alerts, and continuous reefer fault monitoring, drivers, operators, and back-office teams have real-time data into cargo conditions during delivery so they can identify issues early and take corrective action before product quality is spoiled.

• Monitor cargo conditions in real time with 1-way reefer monitoring for zone-specific temperatures, engine hours, power source, and fuel levels, giving dispatchers full visibility into conditions that could impact product quality.

• Take immediate corrective action remotely using 2-way reefer controls to turn units on/off, adjust run modes, and set zone-specific temperatures before temperature excursions lead to spoiled cargo.

• Catch issues before product is at risk with proactive reefer alerts for temperature deviations, low fuel, and equipment alarms, including severity-based notifications and condition-based workflows that trigger only when trailers are on an active trip and outside designated geofences.

• Improve compliance and reduce spoilage over time with historical reefer reporting across data such as temperature, fuel usage, engine hours, and power source, trailer mispull alerts, trailer search, utilization and detention reporting, and integrated door, cargo, and temperature sensors for complete cold-chain visibility.

Sobeys, one of Canada's largest food distributors, relies on Samsara to monitor their reefer temperatures and take proactive action to reduce waste and increase supply chain efficiency across their distribution network.

Calling drivers to adjust reefer settings mid-route creates distraction, delays, and compliance risk, particularly for fleets managing high-volume delivery schedules under tight windows. 

Samsara's direct integration enables fleet managers to remotely adjust temperature setpoints, manage alarms, and view fault codes directly from the Samsara dashboard—without any driver intervention required. This two-way control reduces the operational friction of monitoring large reefer fleets simultaneously, and ensures temperature corrections happen in real time rather than at the next stop. The result is tighter cold chain control, fewer rejected loads, and less driver distraction during deliveries.

While the dual licensing model may present challenges for customer adoption, the true value lies in Samsara’s integrated platform, offering customers real-time insights and advanced trailer monitoring across their entire vehicles, trailers, and the rest of their fleet from a single location.

With Samsara’s OEM API solution, customers can monitor and control their reefers directly within Samsara, while simultaneously accessing the full Trailer Premier functionality for these assets—all in one place. This includes real-time visibility, reporting, ATIS, ABS, integrated workflows, trailer mismatch, and more.

This enables customers to fully utilize the benefits of Trailer Premier functionality while enhancing their reefer monitoring capabilities.

Manual temperature logging is time-consuming, error-prone, and difficult to scale, and gaps in records can expose a fleet to regulatory liability during an FDA audit. With Samsara, you can digitize your recordkeeping to improve efficiency and ensure FDA compliance. Samsara eliminates manual logging through:

• Automatic temperature logging via Environmental Monitors that continuously record data across every cold-chain asset without driver or back-office input.

• Digital reporting that makes FSMA-compliant records available on demand for audits or inspections.

• Digital driver workflows that replace paper-based processes in the cab, ensuring consistent documentation across every route.

Fleet managers evaluating reefer monitoring solutions should prioritize direct OEM integration over third-party hardware add-ons. OEM integrations enable fleets to get real-time two-way temperature control, rather than just passive data visibility. 

Samsara offers direct integration with both Thermo King and Carrier refrigeration units, enabling remote temperature setpoint adjustment, real-time logging, and two-way control. With these OEM API integrations, you can monitor and control their vehicles, trailers, and reefers directly within the Samsara platform, while unlocking advanced trailer functionality. This includes real-time visibility, reporting, ATIS, ABS, integrated workflows, trailer mismatch, and more.

Load rejections and customer disputes over temperature compliance are difficult and costly to resolve without objective, timestamped data from throughout the journey. 

Combined with Samsara's Connected Workflows, fleet managers can build proof of delivery directly into driver workflows, creating a complete record of delivery conditions that improves customer trust and supports regulatory compliance. For food and beverage distributors competing for high-value accounts with strict food safety requirements, temperature-verified delivery documentation helps improve delivery efficiency and maximizes profitability. 

Knowing whether a trailer or reefer is loaded, unloaded, or has had its doors opened unexpectedly is critical for dispatch coordination, theft deterrence, and efficient trailer turn times. Samsara Cargo Monitor Sensors detect when a trailer is loaded or unloaded, giving dispatch teams real-time utilization visibility without waiting for a driver check-in, improving turn times and enabling more efficient asset allocation. Door Sensors alert the moment trailer doors open or close, improving visibility and security across every asset in the fleet. Together, these tools reduce detention time, support theft deterrence, and create a continuous audit trail that operations and safety teams can act on, reducing cargo loss and improving fleet efficiency.

Food and beverage customers achieve significant return on investment (ROI) from leveraging Samsara, driving improvements in efficiency and cost savings. Here are a few examples:

• Gordon Food Service saved $2.5M in fuel by reducing idling and saving 700,000 gallons, lowered idling rates from 17% to 2%, eliminated days of trailer downtime with Smart Trailers, and improved proactive maintenance through real-time trailer visibility.

• Sunrise Produce saved $250K since deploying Samsara, including $50K in fuel costs, $200K in driver overtime by optimizing activity, and increased route profitability with more efficient deliveries.

• Cash-Wa Distributing decreased customer credits for improper temperature claims by 30%, saved $60K per year by eliminating third-party cellular data plans with Samsara’s WiFi hotspot, and consolidated operations/technology to replace multiple vendors with a single platform.

• Performance Food Group consolidated 20 camera vendors onto Samsara’s open platform, reducing back-office time/costs while improving safety, shrink management, and aligning site/fleet security on a single source.

• Glazer’s Beer & Beverage reduced at-fault accident costs by 86% using Samsara’s safety solutions.

• Aunt Millie’s avoided $1M in potential injury claims by improving safety and efficiency with Site Visibility.

• Reddy Ice saved 200+ driver hours per day by consolidating paper DVIRs, route sheets, and HOS into a single app, reducing failed roadside inspections by 19% YoY and decreasing CSA scores.

• R.E. Garrison Trucking, operating 1,500 refrigerated trailers, reduced workers' comp claims by 83%, lowered preventable accidents by 30%, and saved $730K in fuel costs.

• Quality Custom Distribution achieved a 100% decrease in drowsy driving crashes in 6 months, saving time previously spent on hiring and training.

• KeHE Distributors consolidated driver and back-office workflows, saving thousands of hours on incident investigation.

• BioTrans achieved a 100% successful delivery rate by leveraging real-time, ultra-critical temperature data.

• Crafty reduced auto claims by 33% reduction in auto claims, and increased miles driven by 20%.

• Graham’s The Family Dairy achieved a 60% drop in harsh event rates via in-cab AI Dash Cam coaching and reduced KPI report generation time by 50% through centralized visibility and digitized processes.