AquaLab 4TE Water Activity Meter
AquaLab 4TE Water Activity Meter
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AquaLab 4TE Water Activity Meter

SKU: 1166

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The METER AquaLab 4TE water activity instrument is the leader in benchtop water activity instrumentation.

The temperature-controlled measurement chamber, four decimal place display, internal data memory and 21CFR part 11 compliant administrator login features make this the world's leading water activity instrument, as well as the fastest and most accurate water activity device on the market.

Speed and Accuracy
Measure water activity in 5 minutes or less (average read time: 2.5 minutes) with ±0.003 aw accuracy. AquaLab instruments are the fastest, most precise water activity meters available.

Use (Almost) Anywhere
Water activity meters must report a temperature because water activity is temperature dependent. Internal temperature control lets you set a measuring temperature between 15º - 50°C and use the instrument anywhere-even outside the QC lab.

Use the AquaLab Water Activity Meter 4TE to get lab-quality measurements at the line, receiving dock, processing plant, storage facility-anywhere you need to test and verify the safety and quality of your products and ingredients.

How it Works
Put a 7.5 ml product sample in a disposable cup, place in the water activity meter, seal the sample chamber lid over the sample, and wait for vapor equilibrium.

An infrared beam focused on a tiny mirror determines the precise dewpoint temperature of the sample. That dewpoint temperature is then translated into water activity.

Easy to Clean
The sample chamber lid flips up so contaminated sensors are quick to spot and easy to clean.

Secure Data
The AquaLab Water Activity Meter 4TE stores time, date, and user information with every measurement and calibration, and can store up to 10,000 secure data points.

Administrative functions can be set to control access to data. Designate up to 25 unique users and passwords. Use the RS-232 serial data port to download or print data for statistical analysis and to maintain compliance records and archives.


  • Fast: Water activity meter gets readings in 5 minutes or less
  • Accurate: ±0.003 aw
  • Verifiable with independent salt standards
  • Repeatable: Different users, different locations, same result
  • Portable: Weighs just 7 pounds
  • Easy to use: Water activity meter yields precise measurements with minimal training
  • Secure: Offers administrative control over calibration and sample data
  • Proven: Used by 80 of the top 100 food companies

Want to measure volatiles? Ask about our Series 4TEV model.


Accuracy ± 0.003 aw
Range 0.030 to 1.000 aw
Measurement Speed < 5 min
Resolution ± 0.0001 aw
Temperature Control 15 to 50°C (± 0.2°C)
Data Storage 10,000
Operating Environment 4 to 50°C (39.2 to 122°F)
0 to 90% Relative Humidity (non-condensing)
Sensor Type 1) Chilled-mirror dewpoint sensor
2) Infrared temperature sensor
Sample Dish Capacity 7 ml recommended (15 ml full)
Universal Power 110 V to 220 V AC, 50/60 Hz
Weight 3.18 kg (7 lb)
Case Dimensions 26.7 x 27.8 x 12.7 cm
(10.5 x 10.9 x 5 in)
Case Material Powder-painted aluminum
Display 20 x 2 alphanumeric dot-matrix LCD with backlighting
Temperature Stability User-selectable range, internal thermoelectric controlled
Data Communications RS232A compatible 8-data bit ASCII code
9600 baud
no parity
1 stop bit
Interface Cable Standard RS232 serial cable (included)
Warranty One year, parts and labor (ask us about a 3 year warranty!)


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