Shaw Moisture Meters manufacture the sensor base layer with such precision to ensure a stable, reliable and drift free moisture sensor. The SHAW dew point sensor includes three major advantages over other sensors: specificity, stability and AutoCal (automatic calibration). All three of which are due to the proprietary manufacturing techniques used in the construction of the sensor.
We manufacture each dew point sensor precisely to saturate with water vapour at its design maximum. Therefore, exposing the sensor to moisture above its maximum operating range, will rapidly bring it into equilibrium. It then ceases responding to any further increase in moisture. This forms the basis of AutoCal (automatic calibration).
Integrated into SHAW dew point instruments, AutoCal is a major advantage and one of the most important and unique features of the SHAW system. It provides an easy-to-use functionality which offers many benefits.
AutoCal involves routine checks of the sensor. To perform AutoCal simply expose the sensor to any atmosphere which is wetter than its operating range (usually, room air is sufficient). Then, raise the desiccant head and follow the process to complete AutoCal on the instrument. This synchronises the dew point sensor and the instrument and prepares them for use. Automatic calibration of SHAW dew point instruments allows the user to ensure optimum accuracy between laboratory calibrations by checking the span of the dew point hygrometer and correcting for any deviation.
Complete AutoCal in-situ, without the need for any special equipment or skilled personnel. The net results include: reduced downtime, minimised calibration costs and immediate verification of the dew point system. You can perform AutoCal periodically. Every two to three months as part of a regular service and maintenance routine is acceptable. Or when you require verification, a result or need to inspect an instrument’s performance. However, AutoCal should not replace true calibration against a known standard.