The trailer that disappeared on Friday is at a yard in Modesto. You knew at 4:14 p.m.

Trailers, containers, generators, and yellow iron don't have ignition power — and they don't have a driver. iMatrix puts a tracker on every asset that needs to come home, and tells you the second one moves, opens, or starts heating up.

Where it is. Whether it's open. What's happening inside.

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Live position

Multi-GNSS positioning every check-in. Geofences alert when a trailer leaves a yard, crosses a border, or arrives at a customer.

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Door & tamper events

Wireless Sentry-1 magnets log every open and close. Tamper alerts fire if the sensor is removed from its mount.

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Cargo conditions

NEO-1 wireless sensors track temperature and humidity inside the trailer or container — so spoilage shows up before the customer does.

Three devices. One asset story.

Asset tracking is rarely a single sensor. The vehicle or trailer needs a gateway, the cargo needs a thermometer, and the door needs a witness. iMatrix gives you all three with shared cellular, shared cloud, and shared timeline.

From magnetic mount to dispatch dashboard.

Mount the FC-501 once. Stick the Sentry-1 and NEO-1 sensors inside. From then on, every event flows through one BLE link, one cellular pipe, and one timeline in iMatrix Cloud.

1 · The asset reports

FC-501 wakes on motion or schedule, takes a GNSS fix, polls Sentry-1 and NEO-1 over BLE, and uplinks the bundled record over LTE — even from the back of a yard with poor signal.

2 · You see one timeline

Position, door state, temperature, and impact events arrive on the same Cloud timeline. Geofence + door = "trailer opened off-route." Position + temp = "container baking in the sun." You correlate without spreadsheets.

If it can move and be stolen, this stack tracks it.

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Reefer & dry-van trailers

FC-501 on the nose, Sentry-1 on the rear door, NEO-1 inside. Catches drop-and-hook moves, unauthorized opens, and HVAC failures.

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Intermodal containers

Battery-assist FC-501 reports through 2G fallback in remote ports. NEO-1 watches humidity for moisture-sensitive freight.

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Heavy equipment & gensets

Track yellow iron across job sites. Sentry-1 on the operator cabinet flags theft attempts; NEO-1 watches engine-bay temperature on idle gensets.

Cold-chain trailer? Pair this with Cold Chain for FSMA-ready exports, or Reefer Monitoring for the in-trailer reefer probe.