Bluetooth Temperature Sensor Puck: A Ten-Year Wireless Thermometer for Reefers and Coolers

A Bluetooth temperature puck, or puck thermometer, is a sealed Bluetooth temperature sensor that measures a load's temperature and broadcasts it over Bluetooth Low Energy every few seconds on a battery that lasts about ten years. Put it in a reefer compartment, a van cooler, a tote or a pharmaceutical shipper, and it reports the temperature of the load, which is what your product cares about, instead of the air at the reefer's return duct.

A GPS tracking device with the IOX-BT module, or a Bluetooth sensor gateway on trailers with many sensors, picks up the puck and sends each reading to the High Point GPS platform with the vehicle's position and time. Rules alert the dispatcher and the driver when a reading leaves its band. Reports show the temperature for every minute of a trip, and a geofence at the customer marks the delivery, so the record shows the temperature on arrival. The puck stores nothing and needs no setup beyond pairing.

Put one in each reefer compartment and in each refrigerated van or straight-truck body. On pharmacy, meal and grocery runs, it rides inside the insulated tote or cooler. A puck in a depot walk-in cooler or freezer reports through whichever truck is parked nearby. Use one anywhere a customer contract or food-safety plan asks for a continuous temperature record.

Where the puck sits decides what it measures. In a reefer trailer, mount it at product height about two-thirds of the way back, away from the evaporator's discharge, so it reads the load and not the coldest air. In a tote, place it against the product, not the lid. Set the alert band a degree or two wider than the product's specification with a delay of a few minutes: a door opening at a stop won't page the dispatcher, but a compressor failure will. Typical bands fleets configure:

Pair the puck to the vehicle's GPS tracking device or gateway in the High Point GPS platform, place it, and set the band and alert rules. High Point GPS supplies and pairs the pucks and builds the cold-chain reports for food, beverage and pharmaceutical fleets across Canada and the United States.