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ABOUT THE PAWKIT
Pawkit
2.2
How the Pawkit Works
The Pawkit uses a capacitance humidity sensor to measure the water
activity of a sample. The sensor converts the humidity value into a
specific capacitance, which is then measured electronically by the cir-
cuit. This signal is then translated by the software and displayed as
water activity on the instrument screen. At equilibrium, the relative
humidity of the air in the chamber is the same as the water activity
of the sample.
2.3
Accuracy
The Pawkit is accurate to
±
0.02
a
w
. For many applications, this ac-
curacy is more than adequate. If you require higher accuracy in your
measurements, we recommend you use METER’s AquaLab water ac-
tivity meter, which is a lab-grade, bench-top instrument that has an
accuracy of
±
0.003
a
w
, and measures based upon the chilled-mirror
dew point method. Contact METER for more details.
2.4
Getting Started
2.4.1
Components of your Pawkit System
Your Pawkit should have been shipped to you with the following
items:
•
Pawkit main unit
•
Operator’s Manual
•
Quick Start Guide
•
Certificate of Analysis
•
Calibration Certificates
•
Anti-Skid Pad
•
Durable carrying case
•
60 disposable sample cups with lids
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