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New Vaisala Dewpoint Transmitters for High Temperature Applications

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article image DRYCAP Dewpoint and Temperature Transmitters

The new DRYCAP Dewpoint and Temperature Transmitters DMT345 and DMT346 from Vaisala measure dewpoint and mixing ratio directly in high temperature drying processes. They do not require sampling systems or trace heating in pipelines.

The DMT345 probe is designed for direct measurement in temperatures up to 180 °C. The optional installation flange allows for adjustable installation depth and therefore precise positioning. In addition to measuring dewpoint and mixing ratio, the DMT345 measures temperature and relative humidity.

The DMT346 probe is constructed for humidity measurement in process temperatures between 140 °C and 350 °C. The DMT346 comes with a cooling set as a standard accessory. System cooling is accomplished without moving parts, additional power or cooling utilities. This removes the risk of damage to the transmitter that may occur due to cooling system failures.

The DMT345 and DMT346 incorporate the new generation of the Vaisala DRYCAP Sensor, which provides accurate and reliable measurement with long-term stability and fast response time. The sensor recovers quickly after getting wet and is immune to particulate contamination, condensation, oil vapor and most chemicals.

Due to the patented auto-calibration feature, both transmitters have low maintenance requirements. The auto-calibration detects possible measurement inaccuracies and automatically corrects dry-end drift in calibration. The large numerical and graphical display with a multilingual menu allows the user to monitor operational data, measurement trends and up to 1-year of measurement history data.

Typical applications for the Vaisala DRYCAP dewpoint transmitters DMT345 and DMT346 include high temperature ovens in the food industry and high temperature drying in the process industry.

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