Portable water activity meter

Grab and go

Designed for government inspectors and third-party auditors, the battery-operated portable PAWKIT water activity meter is perfect for water activity spot checks on the go.

How it works

To make a measurement, flip back the sensor cover and fit the PAWKIT over a standard AQUALAB sample cup. Push the button for a water activity reading in 5 minutes.

Portable water activity

The 3.5 x 4 inch PAWKIT weighs just 4 ounces and is designed to fit in a lab coat pocket. It runs on two coin cell batteries that last up to 3 years under normal use. It has an easy two-point calibration using AQUALAB standards.


The PAWKIT is designed to make readings where a bench top meter is not practical. Its small size and battery power deliver the ultimate in portability, but limit the PAWKIT’s accuracy (± 0.02 aw) due to its capacitance sensor and lack of temperature control .

The PAWKIT portable water activity meter should only be used in situations where a higher accuracy reading is not critical to ensure or document safety and quality.


Water activityRange: 0.00–1.00 aw
Resolution: 0.01 aw
Accuracy: ±0.02 aw
TemperatureResolution: 0.1 °C
Accuracy: ±0.2 °C
Read time5 min
Case dimensionsLength: 10.7 cm (14.21 in)
Width: 6.6 cm (2.60 in)
Height: 2.0 cm (0.79 in)
Case materialStainless steel and valox 325 plastic
Sample cup capacity7.5 mL (0.26 fl oz), recommended (15 mL (0.47 fl oz), full)
Weight115 g (4 oz)
Display64 × 128 graphical
Operating temperatureMinimum: 4 °C
Maximum: 50 °C
Operating environment0%–90% relative humidity (noncondensing)
Power2-3 V 16 mm coin cell batteries (approx. 3 yr. life in normal use)
COMPLIANCEManufactured 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