1 minute water activity meter

Water activity + moisture content in one minute


The speed challenge

Normally, measuring water activity takes a significant amount of time. The sample must come to equilibrium with the air in the headspace above the sample before a reading can be taken. Depending on the sample, that can take 2-5 minutes—even longer for coated products, products high in fat, or volatile compounds. There hasn’t been a way around “equilibrium time” or “dwell time.”  Until now.

Fast answers, no waiting

The new AQUALAB 3 breaks the speed barrier. Using SKALA-powered predictive AI, it delivers both water activity and moisture content readings on a single sample in one minute, even when measuring volatile compounds.

Clear shipments quickly

AQUALAB 3 lets you know within one minute whether the batch will pass or fail.  Quickly test as many samples as you need to establish a robust testing protocol and accurately predict in-package water activity. Don’t wait for answers—clear shipments quickly and avoid logistical snarls.

Avoid rework and scrapped batches

Make fast decisions at the line to address issues before your process goes out of control. Get “outside operating limits” indicators within 60 seconds and use the predicted final values to adjust belt speed, oven temperatures, water content in dough, and other parameters before they result in rework or scrap. Fast water activity measurements offer the most precise way to monitor and control moisture at the line.

Speed changes everything

One minute water activity offers options you’ve never had before for robust and rapid pass/fail determination, tighter process control capability, and rock-solid indicators to clear shipments on time.

Request a quote Contact us Learn more about SKALA


  • Fast: water activity readings in 1 minute.
  • Easy to use: precise measurements, minimal training
  • Expandable: connect and manage multiple AQUALAB 3 instruments with one iPad
  • Repeatable: certified standards for repeatability across users and locations
  • Multiple reading types: simultaneous moisture content readings
  • Optional block exchange program includes annual recalibration, extended warranty, and service plan






SKALA Enterprise

For labs getting started with moisture control: access real time water activity, moisture content data and basic functions like search and CofAs.For labs with digital dreams: collect and manage data from checklists, locations, and all your lab instruments (automatically!) for safety and quality.For pros who need customization: bring lab and production line data together for total moisture control to maximize yield and profit.
  • See all water activity and moisture content readings in real time
  • Set pass/outside limits/fail specs
  • Print batch Certificates of Analysis (water activity readings)
  • Search and filter all water activity and moisture content readings
  • View real-time dashboards for process control
  • Export all readings for advanced analysis
  • Connect other instruments (pH meter, moisture meter, brix meter, balance, etc.)
  • Integrate location measurements (oven temp, humidity, etc)
  • Define and display process control dashboards for production
  • Integrate data from PLCs
  • Implement overpack dashboards and machine learning
  • Smokehouse module
Contact usContact usContact us
Manage water activity instrumentsQC checklists tied to batchesCreate line users
Manage supervisor reading approvalsAdd location measurements to dashboardsOEE Module
Manage batchesExecutive dashboardsCure House module
Statistical Process Control (water activity readings)Sample statistics (GSF)Extruder module
Set product group specifications (water activity readings)GSF reportsSteamer module
Unique sample identifierManage corrective actionsPro reports
All events logged in admin event logTrack customer feedbackView Batch Score dashboard
Manage usersManage customersManage Batch Score
Access helpManage vendors
Report on vendors



Water activity

Sensor type: Chilled mirror dew point and capacitive hygrometer
Range: 0.030–1.000 aw
Resolution: 0.001 aw
Accuracy: ±0.005 aw (dew point), ±0.015 aw (capacitance)
Repeatability: 0.002 aw (dew point), 0.010 aw (capacitance)

Moisture content

Accuracy: 0.1%–0.5% to moisture content reference
Repeatability: 0.02%

Operating temperature

Controlled at constant: 25 °C
Resolution: 0.1 °C
Accuracy: ± 0.1 °C

Read time

Minimum: 60 s (One-Minute Water Activity Mode; subscription required)
Maximum: >200 s (estimated)


Case dimensions

Length: 23.4 cm (9.2 in)
Width: 23.4 cm (9.2 in)
Height: 12.1 cm (5.0 in)

Case material

Polycarbonate-ABS (PC-ABS)

Sample cup capacity

7.5 mL (0.25 fl oz), partially full, recommended
15 mL (0.51 fl oz), full


5 kg (11 lb)

Operating temperature

Minimum: 15 °C
Maximum: 35 °C



Operating environment

0% - 90% noncondensing

Data communications

9,600 baud


110–240 VAC

Reading duration

Minimum: 60 s (One-Minute Water Activity Mode; subscription required)
Maximum: >200 s (estimated)


Manufactured under ISO 9001:2015
EM ISO/IEC 17050:2010 (CE Mark)

California requires the following notice:

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov


Have a question or problem? Our support team can help.

We manufacture, test, calibrate, and repair every instrument in house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.

Email: support.food@metergroup.com

Phone: 509-332-5601