Single-Use NFC Temperature Loggers for Cold-Chain Shipments

An iPhone with iOS 16 or later, or an Android phone with NFC and Android 8.0 or later, running the free LoggerFlex NFC app (listed as LoggerFlex NFC Tag Reader on the App Store and Google Play). The app works in English, French, Spanish, German, Swedish, Danish and Portuguese. No PC and no USB cable are needed.

The app on the scanning phone is set once to the email address of your LF Cloud account, for example your QC manager's. From then on every scan from that phone uploads the whole trip to that account. The person scanning needs no login or password. Each phone uploads with its own private key, and the account owner gets an email when a new phone is set up, with a link to stop it. Share the account with as many people as you like, and they can open the chart, statistics and reports on a Mac, PC or phone, from anywhere. A receiver at another company installs the free app and enters your account email once.

At the moment of the scan, if the tags were set with at least one alarm limit. If any reading in the trip was outside your limits, everyone the account is shared with gets an email and a push notification. The tag has no radio for use on the road, so there are no alerts during the trip. No alert after a scan means every reading was in range, and the trip is filed in your account either way. A tag that is never scanned uploads nothing, so its trip will not appear in your account.

The same tap that uploads the trip opens a report on the phone: the chart (tap or drag for any reading, or view it full screen), the minimum, maximum and average with their times, and every reading. If the tag has alarm limits, a large green OK or a red Out of range with the number of readings outside comes first, and the limits show as red and blue lines on the chart. The report can be shared as a PDF or as a CSV file for Excel, in °C or °F. Nothing stays on the phone after Done; the trip is kept in your LF Cloud account.

Each tag has its own page at app.loggerflex.com with the full chart, the minimum, average and maximum, and, with location turned on in the app, a map pin where it was scanned. The pin shows where the tag was read, not the route it took. Reports come in PDF and Excel: daily minimum, maximum and average, vaccine temperature with MKT (mean kinetic temperature), food safety, hourly, transport log, detailed readouts, peak points, custom interval, multi-sensor consolidation and AI Deep Dive. Most can be set to run automatically. The multi-sensor report combines several tags in one report, so tags placed around a truck, cooler, warehouse or room give you a practical temperature map. All of it is free.

The upload needs mobile data or Wi-Fi. If the dock has no signal, scan the tag again once the phone is connected.

No, and there never will be for NFC tags. The app, the LF Cloud account, sharing with unlimited people, out-of-range alerts, the full history and all PDF and Excel reports are free.

Yes. It is waterproof and can be submerged, so it can go in ice slush, wet seafood totes, produce containers or a water bath. It is read by tapping, so there is no port to seal.

Tell LoggerFlex or your distributor what you need when you place the order: start delay, recording interval, low and high alarm limits, what happens when memory is full, and the red alarm LED. The tags are configured to order before they ship, at no extra cost, so there is nothing to set up at your end. If you ask for nothing, you get the standard setup: recording starts 10 minutes after activation, a reading every 10 minutes, and it stops when the memory is full.

Instead of stopping when its 4,000-reading memory is full, the tag keeps recording and overwrites the oldest reading. Scan it at least once per memory cycle (about every 4 weeks at a 10-minute interval) and the cloud keeps every reading. One tag can then build a history of about a year on a fridge, a cooler, a returnable tote or a storage room.

If you order the red alarm LED, the tag flashes red after any reading outside your alarm limits. The receiver sees there was a problem as soon as they open the box, before they scan. It needs at least one alarm limit.

The battery lasts about 1 year after activation. The memory holds 4,000 readings: about 4 weeks at the standard 10-minute interval, or longer with a longer interval. It measures from -20 °C to +70 °C (-4 °F to +158 °F) with an accuracy of ±0.5 °C (±0.9 °F).

They see the trip they just scanned, on the phone, so they can act at the dock: the OK or Out of range, the chart and the readings. They cannot open your LF Cloud account, other tags or the history, and nothing stays on the phone after they tap Done. Only the people you share the account with see the history and the reports.

Yes. Each phone uploads with its own private key. The first time a phone is set to your account email, the account owner gets an email naming the phone, with a link to stop readings from it. A stopped phone shows that the account owner has blocked its uploads. A phone can only send readings; it never opens your account.

For shipments it is single-use: one tag per one-way trip, activated with 3 presses of the button. In continuous mode, one tag can stay on a fridge, cooler or returnable tote for about a year. For alerts during the trip on your own vehicles, see the EDGE Thermo Cellular logger.

LoggerFlex is a B2B manufacturer and does not publish hardware prices. Request a quote from LoggerFlex or find your local authorized distributor, and include the setup you need: it is configured to order at no extra cost. Unused tags keep for about five years before activation, so you can stock up.