Importance

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Abstract

A moisture meter (1) has an elongate probe (3) supporting at least one pair of electrodes (5, 6), and being configured for insertion into bulk material (C). There is a transmitter (50) for driving an electrode (5, 6) and a detector (51) for receiving current signals of an electrode. A controller (54) controls drive of the electrodes (5, 6) and processes detected signals to provide a moisture reading. There are at least two axially separated radial spacers (7, 8) having ridges (30) extending radially to an extent greater than the electrodes, to centralise the probe and to provide a gap between the electrodes and bulk material when the probe is inserted in a hole (H) in the bulk material. The spacers (7, 8) are configured to provide a low friction fit within a hole in the bulk material. There is a leading spacer (7) on a leading side of a first electrode (5) and a trailing spacer (8) at a trailing side of a second electrode (6). The transmitter (50) is connected to an electrode by a wire running along a groove (22) in a probe former (21), and the detector (51) is connected to an electrode by a wire running along a diametrically opposed groove (22).

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First Claim