A data logger is a small electronic or paper-based device that automatically records environmental conditions, such as temperature and humidity, throughout a shipment. Using one requires understanding how it activates, records data at set intervals, stores that information, and makes it accessible once a shipment arrives. This article covers what data loggers do, how they operate, and which types suit different cold chain needs.
What is a data logger, and what does it actually do?
A data logger is a device that continuously monitors and records environmental parameters, most commonly temperature, over a set period of time. It captures readings at regular intervals, stores them internally, and produces a report that shows exactly what conditions a shipment experienced from start to finish.
In cold chain logistics, this matters enormously. Perishable goods, pharmaceuticals, fresh produce, and other temperature-sensitive products must stay within defined ranges throughout transport. A data logger creates an objective, time-stamped record that confirms whether those conditions were maintained, making it an essential tool for compliance, quality control, and dispute resolution.
How does a data logger work step by step?
Data loggers follow a straightforward process: they activate, measure, record, and report. Understanding each stage helps you use them correctly and interpret the data they produce.
- Activation: The logger is started before shipment or at the point of dispatch, either by pressing a button, removing a pull tab, or scanning it with a device.
- Measurement: An internal sensor reads the ambient temperature at programmed intervals, typically every 5 to 30 minutes, depending on the configuration.
- Storage: Each reading is saved to internal memory. Most loggers hold thousands of data points, covering multi-day journeys with ease.
- Battery operation: A built-in battery powers the sensor and memory throughout the journey. Battery reliability is critical, as a failed battery means lost data.
- Data retrieval: At the destination, data is accessed either by connecting the logger to a computer via USB, using Bluetooth, or, with newer NFC-enabled loggers, by tapping a smartphone on the label.
- Reporting: The retrieved data is displayed as a temperature graph or summary report, showing min/max values, time out of range, and other key metrics.
What types of data loggers are used in cold chain monitoring?
There are three main categories of data loggers used in cold chain contexts, each with different trade-offs in terms of cost, usability, environmental impact, and compliance suitability.
Single-use electronic loggers are the current industry standard. Made from plastic with lithium batteries, they are used once and discarded. Tens of millions are thrown away each year, and because they contain electronics and batteries, they require proper e-waste disposal, which is not always carried out correctly.
Reusable electronic loggers are also plastic-based, with rechargeable batteries. They can complete multiple trips before eventually becoming e-waste. The trade-off is the logistical overhead of retrieving, recharging, and recalibrating them between uses, which adds complexity and cost.
Paper-based loggers represent a newer approach. Tapp has developed paper-based data loggers that use NFC technology, making it the only provider of this type. Unlike electronic loggers, paper-based loggers are lithium-free and can be recycled through standard paper waste streams globally. Their batteries are also notably more reliable than those found in many single-use plastic loggers: because the paper-based design draws minimal power and uses a purpose-built energy source optimised for the logger’s specific operational window, battery depletion mid-journey is far less of a concern. This makes them well-suited to longer or multimodal shipments, where battery failure in a conventional logger could mean a complete data gap.
How Tapp makes cold chain data logging simpler and more sustainable
Tapp’s paper-based NFC data loggers address the most common pain points that logistics professionals encounter with traditional electronic loggers. Contact our cold chain monitoring team to discuss your specific requirements.
- No app required: Any NFC-enabled smartphone can read the label instantly, with no dedicated hardware, software installation, or USB connections needed.
- Automatic cloud reporting: Data syncs to the TappOS dashboard the moment a label is tapped, giving both sender and receiver immediate access to the temperature record.
- EN 12830-certified accuracy: Tapp’s loggers meet the European standard for temperature recording instruments used in the transport, storage, and distribution of chilled, frozen, deep-frozen, and fresh food.
- Up to 90% less e-waste: Lithium-free and recyclable through standard paper waste streams, these loggers dramatically reduce the environmental footprint of cold chain monitoring.
- Universal transport compatibility: Suitable for road, sea, air, and rail, with a waterproof coating and a flight-safe battery.
If you are looking for a cold chain monitoring solution that combines professional-grade accuracy with genuine sustainability, discover what Tapp’s paper-based data loggers can do for your supply chain.
