AquaLab PRE Water Activity Meter
AquaLab PRE Water Activity Meter
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AquaLab PRE Water Activity Meter

SKU: AquaLab_PRE

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The METER AquaLab "PRE" is a robust entry-level water activity meter.

It uses the same industry-standard primary water activity method you find in our top-of-the-line AquaLab Series 4TE.

Minimum Maintenance
Pre uses the dewpoint method—a primary measurement of water activity. That eliminates the need for lengthy sensory calibration. Just a quick verification check and you’re good to go.

Real water activity—FAST
Primary measurement allows Pre enjoy a distinctive advantage in speed. Pre delivers top-accuracy readings in five minutes or less—no need to sacrifice accuracy for speed.

Solid Repeatability
Pre holds the sample at 25°C so temperature fluctuations won’t affect your readings. Water activity is temperature dependent; measuring at the same temperature every time assures consistency in your readings.

Reliable Accuracy
Pre’s dewpoint method and temperature-stable features mean good agreement between the Pre and the Series 4. Its basic 0.01 aw accuracy enables many of our customers to add water activity testing at the line, loading dock, or offsite facility.

Dependable Support
Pre includes Decagon’s trademark free technical support—food scientists and instrument specialists just a phone call away.

Full Range
Pre lets you measure over the whole range of water activities, 0.05 to 1.00 aw.


The Pre may look basic, but that’s because all the good stuff is inside!

  • Accurate: ±0.01 aw
  • Verifiable: With independent salt standards
  • Repeatable: Different users, different locations, same result
  • Easy to use: Precise measurements with minimal training


Water Activity Range Dew point block – 0.05 to 1.00
Water Activity Accuracy ±0.01 aw
Water Activity Resolution ±0.001
Read Time1 ≤ 5 min.
Sample Temperature Control 25 ◦C
Sample Temperature Accuracy2 ±0.2 ◦C
Sample Temperature Resolution 0.1 ◦C
Sample Dish Capacity 7 ml Recommended (15 ml Full)
Operating Environment 4 to 50 ◦C and 0 to 90%
Relative Humidity (non-condensing)
Case Dimensions: 24.1 x 22.9 x 8.9 cm
Weight 3.2 Kg
Case Material Powder Painted Aluminum
Display: 20 x 2 alphanumeric backlit LCD
Data Communications RS232A compatible, 8-data bit ASCII code, 9600 baud, no parity, 1 stop bit
Power 110 VAC to 220 VAC, 50/60 Hz
Warranty 1 year parts and labor

1 on samples with no significant impedance to vapor loss
2 AquaLab is calibrated to a NIST traceable temperature standard.

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