You monitor both temperature and humidity in a single shipment by using a combined humidity data logger, a device that measures and records both parameters simultaneously throughout transit. One logger, two data streams, and a complete picture of the conditions your goods experienced from pickup to delivery.
This matters because temperature alone does not tell the full story for many sensitive products. Flowers, fresh produce, pharmaceuticals, and seeds can all suffer damage from humidity levels that are too high or too low, even when temperature stays within range. The sections below answer the most common questions about how combined monitoring works in practice.
What types of shipments require both temperature and humidity monitoring?
Shipments that require both temperature and humidity monitoring are those carrying products sensitive to moisture as well as heat or cold. Fresh flowers, fruits, vegetables, seeds, and certain pharmaceutical products all fall into this category. For these goods, humidity imbalances can cause mold, dehydration, condensation damage, or accelerated spoilage, making a humidity data logger just as important as temperature tracking.
Cut flowers, for example, lose moisture rapidly in low-humidity environments, shortening vase life significantly. Seeds intended for planting can lose viability if exposed to excess moisture during long sea or road transport. In the pharmaceutical and life sciences sector, certain biologics and diagnostic materials are highly moisture-sensitive, meaning humidity excursions can compromise the product even when temperature remains correct. Fresh produce shipped across continents faces similar risks, particularly during multimodal journeys that move between refrigerated trucks, cold storage depots, and air freight holds with varying humidity conditions.
How does a single data logger track both temperature and humidity at once?
A single data logger tracks both temperature and humidity at once by housing two sensors in one unit, each recording measurements at defined intervals throughout the journey. The temperature sensor captures thermal conditions while a separate humidity sensor measures relative humidity in the surrounding environment. Both data streams are stored internally and retrieved together when the logger is read at the destination.
Modern loggers sample conditions at programmable intervals, often every few minutes, building a continuous record across the entire shipment. Because both sensors operate within the same device, the readings are time-stamped together, making it straightforward to identify moments when both parameters moved outside acceptable ranges simultaneously. This correlation is often more useful than two separate logs, because it shows the precise environmental conditions a product experienced at any given point in transit.
Tapp’s the world’s first paper-based datalogger use NFC technology to capture and store this dual-parameter data, and the logger requires no app to read. A single tap from any NFC-enabled smartphone retrieves both temperature and humidity records and uploads them automatically to a cloud dashboard, accessible to both sender and receiver.
What’s the difference between a temperature-only logger and a combined temperature-humidity logger?
The key difference between a temperature-only logger and a combined temperature-humidity logger is the number of parameters recorded. A temperature-only logger captures a single data stream, while a combined logger records both temperature and relative humidity simultaneously, giving a fuller picture of the conditions inside a shipment.
For many shipments, temperature data alone is sufficient. Frozen meat, for instance, is primarily at risk from thermal excursions, and a standard temperature logger covers that need. But for products where moisture levels are equally critical, a temperature-only record leaves a significant gap. If a shipment of flowers arrives wilted or a batch of seeds shows mold, a temperature log that shows no excursions provides no explanation and no accountability. A combined logger would have captured the humidity spike that caused the problem.
Combined loggers are also increasingly relevant for sustainability-focused operations. Electronic data loggers, whether temperature-only or combined, require e-waste disposal at end of life due to their plastic construction and lithium batteries. Paper-based loggers are recyclable through standard paper waste streams globally, and their lithium-free design means the battery itself does not contribute to hazardous waste, an advantage that applies whether you are logging one parameter or two.
How do you read and share dual-parameter data after a shipment?
After a shipment, you read dual-parameter data by retrieving the stored records from the logger using the appropriate method for its type, then sharing the resulting report digitally with relevant parties. The exact process depends on the logger technology used, but the goal is always the same: a clear, timestamped record of both temperature and humidity across the full journey.
Electronic data loggers typically require a USB connection or Bluetooth pairing to download data, which then needs to be processed through dedicated software before it can be shared. This creates friction, particularly in environments where USB connections to networked computers are restricted for security reasons, a common situation in pharmaceutical facilities.
Paper-based loggers simplify this considerably. Because they use NFC tap technology, any NFC-enabled smartphone retrieves the data instantly, with no app, no USB cable, and no dedicated hardware required. The dual-parameter report uploads automatically to a cloud dashboard the moment the logger is tapped, where both sender and receiver can view it without needing to exchange files or install software. This accessibility is particularly valuable for international supply chains where receiving parties may have limited technical infrastructure but still need to verify shipment conditions before accepting goods. To learn more about how combined monitoring can work for your specific supply chain, book an intro call with an expert.
