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US 6,553,813 B2Granted
Moisture meter with impedance and relative humidity measurements
AssigneeRynhart Research Limited
InventorsAlan Rynhart, John Fallon, James McIlroy
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Abstract
A moisture meter (1) has a hand-held casing (2) with a digital microcontroller (50), LCD display (4), and a keypad (3). Spring-loaded contacts (6) contact material and allow capacitive impedance measurement via electrodes (5) and drive/pickup circuits (20). Also, a relative humidity probe (9) provides an input so that the processor generates both moisture contact near-surface measurements and also relative humidity measurements. This allows optimum analysis of material.
Claims17
A moisture meter comprising:
- a hand-held housing;
- a controller;
- an input interface;
- an output interface;
- an electrical impedance sensor connected to the controller;
- a relative humidity probe connected to the controller;
- and
- means in the controller for processing signals from the impedance sensor to generate a moisture content output, and for processing signals from the relative humidity probe to generate a relative humidity output.
5 more elements
Dependencies are inferred from the claim text.