Dew Point Transmitters for High Temperature Applications DMT345 DMT346

The Vaisala DRYCAP® Dewpoint Transmitters DMT345 and DMT346 are designed for humidity measurement in industrial drying applications with particularly high temperatures. The high temperature tolerance of the sensor allows direct measurement from hot process without the need for a sampling system and sample conditioning. The wide dynamic rage of the measurement in DMT345 and DMT346 is unique: Measurements can be made from -40 °C frost point up to +100 °C dew point, with dry-bulb temperatures ranging up to 350 °C.

Vaisala Official Distributor in Humidity, Dewpoint, Continuous Monitoring System (CMS) viewLinc (2015), Temperature, CO2, Barometric Pressure, Moisture in Oil, Wind etc in Malaysia since 1990s


Please click here to visit its successor Indigo Transmitter Series: Indigo510, Indigo520

The equivalents for the DMT340 series:

DMT345 for high pressure is now DMP5 + INDIGO500 transmitter

DMT346 for very high temperature is now DMP6 + INDIGO500 transmitter

Vaisala Dewpoint Transmitter DMT345 and DMT346 incorporate the Vaisala DRYCAP® sensor, which is accurate, reliable, and stable. The sensor is condensation-resistant and is immune to particulate contamination, oil vapor, and most chemicals. The DRYCAP® sensor is notable for its swift response time and rapid recovery after getting wet.

DMT345: Accurate in Hot and Dry Environments

DMT345 is designed for accurate humidity measurement in hot and dry conditions. This model provides unmatched dry-end measurement accuracy at temperatures up to 140 °C; however, it can operate safely at temperatures up to 180 °C. The long and robust steel probe and an optional installation flange allow easy, adjustable installation depth through insulation for example in ovens.

DMT346: Reliable in Very Hot Processes

DMT346 provides the best measurement performance at process temperatures between 140 °C and 350 °C. DMT346 includes a cooling set as standard. The cooling set provides passive cooling by conducting heat away from the probe and thus reduces temperature to optimal range for the sensor. The cooling system has no moving parts, and requires no additional power or cooling utilities, so there is no risk of
sensor damage due to mechanical cooling failure. Additionally, sensor warming minimizes the risk of condensation accumulating on the sensor. In low humidity conditions the combination of auto-calibration and DRYCAP ensures accurate measurement.

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