Moisture Sensor

By September 15, 2017Uncategorised

Shaw Meters Moisture Sensor Technology.
The original and the best

When buying a SHAW moisture sensor product, you know that you’re buying into over 60 years of proven technical experience. The aluminium oxide sensor, used for measuring moisture in air and gases is a great example of why you can always put your trust in us.

The construction of the aluminium oxide sensor is critical to the performance and reliability of systems and yet construction varies from manufacturer to manufacturer. Our methods are tried, tested and trusted and involve layering and treating high quality components in such a way that we can control sensor speed, sensitivity and base capacity.

Unlike other manufacturers, we have the capability to manufacture the sensor’s base layer with a level of precision that ensures a stable, reliable and drift free moisture sensor. Plus our continuous research and development programme has enabled us to manufacture uniform and water vapour specific pores for rapid and predictable response.

The overall measurement range covered by the sensor is –100 °C to +20 °C (-148 °F to +68 °F) dewpoint, which corresponds to 0.001 ppm to 0.2 per cent by volume.

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    P (Purple): -100 °C to 0 °C (-148 °F to +32 °F) DP, 0 – 6,000 ppm
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    S (Silver): -100 °C to -20 °C (-148 °F to -4 °F) DP, 0 – 1,000 ppm
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    (Grey): -80 °C to 0 °C (-112 °F to +32 °F) DP, 0 – 6,000 ppm
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    R (Red): -80 °C to -20 °C (-112 °F to -4 °F) DP, 0 – 1,000 ppm
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    B (Blue): -80 °C to +20 °C (-112 °F to +68 °F) DP, 0 – 23,000 ppm

Key features of the Moisture Sensor

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    Flow independent
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    Calibration Certificate is traceable to the National Physical Laboratory (NPL)
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    Stability, low hysteresis and temperature coefficients
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    Wide dynamic range from 0.001 ppm to 0.2 per cent by volume
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    Requires little or no maintenance
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    Can operate over a wide range of temperature and pressure
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    High selectivity for moisture
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    Intrinsically safe to ATEX and IECEx (when used in conjunction with barrier or isolator)
Shaw Moisture Sensor

SHAW sensor technology

The general principle of operation of an aluminium oxide sensor, for the measurement of moisture in air and gases, is well documented but the actual construction of this type of sensor, which varies widely from manufacturer to manufacturer, is critical to the performance and reliability of systems in field operation… (read more)

Automatic calibration

The most important and unique feature of the SHAW system is the automatic calibration facility… (read more)

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