Water activity meter
AQUALAB 4TE
Fast, precise water activity measurements you can trust.
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Designed for production, QA, and R&D
AQUALAB 4TE uses chilled mirror dew point technology to directly measure water activity, giving food, pharmaceutical, and industrial teams fast, reliable results for product safety, shelf life, and quality control across any environment.
0.003aw
Water activity accuracy
≤5min
Typical read time
Predict, adjust, control
AQUALAB 4TE delivers direct, primary water activity measurements using chilled mirror dew point sensing, providing fast, repeatable results that support confident decisions across production lines, labs, warehouses, and field environments.
Direct dew point measurement
The chilled mirror dew point sensor measures water activity directly—not correlated parameters—delivering superior accuracy, stability, and confidence compared to capacitive or indirect sensing technologies.
Fast, repeatable results
AQUALAB 4TE produces stable water activity readings in five minutes or less, enabling quicker verification, reduced bottlenecks, and consistent results across users, shifts, and locations.
Measure anywhere
Internal temperature control and rugged construction allow accurate water activity testing at the line, receiving dock, storage facility, or lab—without sacrificing measurement quality.
Proven industry standard
Used by 92% of the top 100 food companies, AQUALAB instruments are trusted worldwide for moisture management throughout formulation, production, QA, and finished product verification.
Simple to use
Minimal training is required to generate accurate results, with intuitive operation that helps teams focus on decision-making instead of instrument complexity.
Easy to maintain
The flip-open chamber design allows quick inspection and cleaning, helping users spot contamination early, maintain performance, and reduce downtime with straightforward routine care.
Shop accessories
Water activity standards
Certified salt standards for verifying water activity accuracy and repeatability across instruments, users, and locations. Each box contains 50 tubes.
Disposable sample cups
Single-use sample cups designed to prevent cross-contamination and ensure consistent, accurate water activity and moisture measurements.
Single-use cleaning swabs
Disposable swabs designed for quick chamber cleaning and contamination control between water activity or moisture measurements.
FAQs
Downloads and documents
Cited publications
Technical specifications
Measurement specifications
Water Activity
Range:
0.0300 to 1.0000 aw
Resolution:
0.0001 aw
Accuracy
:±0.0030 aw
Repeatability:
0.0010 aw
Sensor Type:
Chilled mirror dewpoint
Moisture Content
Accuracy:
0.1%–0.5% to moisture content reference*
Repeatability:
0.02%
Temperature
Range:
15.00 – 50.00 °C
Resolution:
0.01 °C
Accuracy:
±0.10 °C
Read Time
Minimum:
60 s
Typical:
~5 min
Physical specifications
Case Dimensions
Length:
26.7 cm (10.5 in)
Width:
17.8 cm (7.0 in)
Height:
12.7 cm (5.0 in)
Case Material
POLYLAC PA-765 (ABS) with fire retardant
Display
64 × 128 graphical
Power
110–220 VAC50/60 Hz
Sample Cup Capacity
14 mL (0.47 fl oz)
Operating Temperature
Minimum:
4.0 °C
Maximum:
50.0°C
Operating Environment
0%–90% noncondensing
Weight
3.1 kg (6.8 lb)
Data Communications
USB A and RS-232 serial
9,600–115,000 baud
