Introducing the AQUALAB 5TE – One Instrument, One Reading

For more than 40 years, AQUALAB has set the standard for water activity measurement. On September 8, that standard moved forward again. The AQUALAB 5TE is the next instrument to carry that standard forward, bringing water activity (a_w) and moisture content together in a single 60-second test, on one platform, with one shared record of what was measured, when, and by whom.

If you're new to AQUALAB or new to water activity altogether, this is the place to start. Here's what the 5TE actually does, why it exists, and how its six core capabilities work together to close a gap that's cost food, pharma, and ingredient manufacturers time, money, and trust for decades.

The problem the 5TE was built to solve

Water activity tells you whether the water in a product is available to drive microbial growth, spoilage reactions, and texture change. Moisture content tells you how much water is there in total. They're related but different measurements, and most teams have historically needed two separate instruments and two separate workflows to get both.

That split creates real operational drag. An R&D team validates a formulation on one instrument. Production monitors the line on a different one, sometimes with a different measurement principle entirely. QA reconciles both before release. Every handoff is a place where data can get lost, logged late, or never connected back to the batch it came from.

The AQUALAB 5TE closes that gap. It's built on the same chilled-mirror measurement principle trusted by nearly all of the largest US food producers, extended to capture moisture content in the same test, the same 60 seconds, the same record.

Six capabilities, one instrument

Dual measurement in 60 seconds

The 5TE returns water activity and moisture content from a single sample in one minute, at ±0.003 a_w and ±0.5% moisture content reference accuracy. There's no tradeoff between the two measurements, and no tradeoff between speed and completeness. One test replaces what used to take two instruments and two workflows.

BlockSwap zero-downtime calibration

Annual calibration has traditionally meant shipping an instrument offsite and running without it in the meantime. BlockSwap changes that. Labs swap the measurement block themselves and keep the instrument running, so calibration stops being a scheduling problem for the whole lab.

A touchscreen built for the floor, not the bench

The 5TE has a 7-inch glove-ready touchscreen, built for the person running the test rather than the person who designed the instrument. Integrated tutorials and multi-language support mean less onboarding time for new operators, and plug-and-play support for keyboards, barcode scanners, and printers means it fits into an existing line rather than asking the line to adapt to it.

21 CFR Part 11 compliance, built in

Electronic records and signatures, searchable audit trails both on-instrument and in AQUALAB Cloud, and user access controls that stay consistent across every device on the line. For QA teams, this is the difference between assembling compliance evidence after the fact and having it already there when the auditor asks.

AQUALAB Cloud integration

Every reading syncs automatically, tied to the specific product, batch, and operator that generated it. Thresholds can trigger instant pass/fail alerts, and the instrument keeps working offline, syncing once it reconnects. The result is one shared record spanning R&D benchtop, production line, and QA release, instead of three disconnected logs that someone has to reconcile by hand.

Built for the realities of a working lab floor

Underneath the software, the 5TE is built with thermopile plating engineered for lab-floor conditions and proactive fan health diagnostics designed to catch a problem before it becomes an unplanned outage. Precision instruments only help if they keep running, and the 5TE is designed around that assumption.

Why this matters beyond the spec sheet

None of these six capabilities exist in isolation. The value is in how they work together: one test replaces two, one record replaces three logs, and one compliance trail replaces after-the-fact reconciliation. That's the actual shift the 5TE represents – not a faster version of the same workflow, but one workflow where before there were several.

For a team that's spent years managing the handoffs between R&D, production, and QA, that's not a small thing. Hidden shelf-life issues, calibration downtime, and disconnected records are exactly the kind of failures that don't show up until they're expensive. Unifying the measurement and the record is what actually closes that gap.

Where the 5TE fits with AQUALAB 3 and AQUALAB 4TE

The 5TE isn't a departure from the instruments that came before it. AQUALAB 4TE established the accuracy standard the industry has come to expect. AQUALAB 3 came after, bringing water activity and moisture content together in one workflow for the first time. The 5TE builds directly on both, consolidating their capabilities into a single platform rather than asking teams to learn something unfamiliar.

Get started with the AQUALAB 5TE

The AQUALAB 5TE is available starting September 8. If you're evaluating a move from AQUALAB 3 or 4TE, or bringing water activity and moisture content measurement into one workflow for the first time, [talk to an AQUALAB specialist] to see how the 5TE fits your lab, your line, and your compliance requirements.

Frequently asked questions

What is the AQUALAB 5TE?

The AQUALAB 5TE is a water activity and moisture content instrument that returns both measurements from a single sample in one 60-second test. It's the newest instrument in the AQUALAB line, following the AQUALAB 4TE and AQUALAB 3.

How is the 5TE different from earlier AQUALAB instruments?

The 5TE measures water activity and moisture content together, in one 60-second test, at ±0.003 a_w and ±0.5% moisture content reference accuracy. It also adds BlockSwap calibration, 21 CFR Part 11 compliance, and AQUALAB Cloud integration.

What is water activity, and how is it different from moisture content?

Water activity (aw) measures the energy state of water in a product – specifically, how available that water is to support microbial growth and drive spoilage reactions. Moisture content measures the total amount of water present, regardless of whether it's available for those reactions. A product can have high moisture content and low water activity, or the reverse, which is why measuring both matters.

What is BlockSwap calibration?

BlockSwap is the 5TE's approach to annual calibration. Instead of shipping the instrument offsite for service, labs swap the measurement block themselves and keep the instrument running without downtime.

Is the AQUALAB 5TE compliant with 21 CFR Part 11?

Yes. The 5TE supports electronic records and signatures, with searchable audit trails maintained both on the instrument and in AQUALAB Cloud, and user access controls mirrored across every connected device.

Can I upgrade from AQUALAB 3 or AQUALAB 4TE to the 5TE?

Yes. The 5TE is designed as the next step for existing AQUALAB 3 and 4TE customers, consolidating water activity and moisture content measurement into one platform. [Talk to an AQUALAB specialist] about the upgrade path for your lab.

How accurate is the AQUALAB 5TE?

The 5TE measures water activity to ±0.003 a_w and moisture content to ±0.5% moisture content reference.

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