AcuDew Aluminum Oxide Moisture Transmitter - DESCRIPTION
by Shaw Moisture Meters
SHAW Model AcuDew high-performance dewpoint transmitter is a robust and reliable, 2-wire, 4-20 mA loop-powered transmitter.
Utilizing the ultra-high capacitance SHAW moisture sensing technology, the AcuDew offers superior sensitivity, accuracy, repeatability, and speed of response. It incorporates the SHAW AutoCal feature, thereby allowing users to check the span of the instrument and correct for any deviation between annual laboratory calibrations. Notably, AutoCal can be carried out on site without skilled personnel or special equipment.
Various dewpoint ranges are available covering an overall range from -120 °C to +20 °C (-184 °F to +68 °F) dewpoint and output units are configurable in °C dewpoint, °F dewpoint, ppm(v), ppb(v), g/m³ and lb/MMSCF.
AcuDew sensors are robust as they are manufactured out of stainless steel with an industrial M12 connector. The SHAW dewpoint transmitter can withstand extreme environmental conditions and is suited to harsh environments providing a protection rating of IP66 (NEMA 4X). The M12 connector reduces set-up time for installing and maintaining wiring systems.
The AcuDew dewpoint transmitter provides a linear, 4 – 20 mA signal over the chosen measurement range and is loop-powered by a 7 – 28 V DC source (24 V option available). When installed in remote locations, the 4 – 20 mA signal can be transmitted to a control system over distances of up to 1,000 meters (3,280 feet).
Easy to operate, the SHAW AcuDew can be installed directly into the process line, or as part of a sample conditioning system while requiring little or no maintenance. This new dewpoint transmitter has been tested to withstand pressures up to 35,000kPA (350 bar) and, consequently, can be directly connected into pipelines. Another key point, when installed correctly, there are no controls to operate during regular use because the AcuDew is designed for long-term unattended operation.
The AcuDew dewpoint transmitter is fully compatible with the new range of single-channel displays:
- AcuLoop plug-in signal indicator for local display
- Panel mount AcuVu with 4-20 mA retransmission and fully programmable alarms
- AcuTrak with additional onboard pressure dewpoint calculations and RS485 communications
- Existing SU4 sample system