Desiccant Dry-Down Technology

Shaw desiccant dry down technology

Desiccant Head Assembly

The unique design of the desiccant head chamber assembly, designed and developed by Shaw Moisture Meters, allows the dewpoint sensor  to be kept dry between tests, ensuring the hygrometer is always ready to carry out rapid spot checks. This is achieved by surrounding the dewpoint sensor with desiccant before the head is lifted for sampling.

At no time is the sensor allowed to come into contact with ambient air as the desiccant and dewpoint sensor are always isolated from atmospheric air. This allows the operator to achieve a meaningful reading in less than ten minutes. The head chamber assembly is also designed so that the void space and chamber wall surfaces are purged with sample gas prior to the exposure of the dewpoint sensor. All surfaces and voids are brought in to equilibrium, giving faster, more accurate and reliable results.