METER Aqualab PRE, Benchtop Water Activity Meter

The METER Aqualab PRE is a robust, entry-level water activity meter with stripped down form, not limited function. It uses the same industry-standard primary aw method you find in the top-of-the-line Aqualab Series 4TE. The PRE may look basic, but that’s because all the good stuff is inside.

Minimum maintenance

The 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

No need to sacrifice accuracy for speed. Primary dewpoint measurement allows the PRE to deliver top-accuracy readings in 5 minutes or less.

Solid repeatability

The PRE holds the sample at 25 °C.

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

The 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

The PRE includes METER’s trademark free technical support—food scientists and instrument specialists just a phone call away.

Full range

The PRE lets you measure over the whole range of water activities, 0.05 to 1.00 aw.

Sensor type

Chilled-mirror dewpoint; infrared temperature

Water activity

Range: 0.05–1.000 aw
Resolution: Chilled Mirror ±0.0001 aw
Accuracy: ±0.01 aw


Resolution: 0.1 °C
Accuracy: ±0.2 °C

Measurement time

Less than 5min

Sample cup capacity

7mL recommended (15mL full)


20 × 2 alphanumeric display with backlighting

Data interface

RS232A compatible, 8 data bit ASCII code, 9600 baud, no parity, 1 stop bit

Case dimensions

Length: 24.1cm
Width: 22.9cm
Height: 8.9cm

Case material

Powder painted aluminium



Operating temperature

4°C to 50°C

Operating environment

0 to 90% relative humidity (noncondensing)

Universal power

110V to 220 V AC, 50/60 Hz. Less than 0.4 amps


CE; AOAC approved method for measurement of aw

METER Aqualab PRE Brochure


METER Aqualab PRE Full Manual


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