Dewpoint And Pressure Transmitter For Compressed Air DPT146

The Vaisala Dewpoint and Pressure Transmitter DPT146 for Compressed Air makes monitoring compressed air simple and convenient. The Vaisala Dewpoint Transmitter for Compressed Air DPT146 measures both dew point and process pressure simultaneously, and is the ideal choice for anyone using or monitoring compressed air.

- The first transmitter that monitors both dew point and process pressure
- A simple and convenient transmitter for monitoring of compressed air
- Highly accurate humidity information thanks to online pressure-compensated dew point data
- Proven sensor technology
- Compatible with the Vaisala Hand-Held DM70 for easy spot checking, local - display and data logging
- Pressure: 1…10 bar
- Dew point: -60 ... +30 °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

What is Dewpoint?

Dew point is the temperature to which air must be cooled for water vapor in it to condense into dew or frost. At any temperature there is a maximum amount of water vapor that the air can hold. This maximum amount is called water vapor saturation pressure. Addition of more water vapor results in condensation.

Dewpoint is the most important KPI of compressed air dryer

The most important KPI to monitor is the pressure dew point (PDP) of the compressed air exiting the dryer(s). The PDP of the compressed air should be monitored at the discharge of each dryer and downstream of where the compressed air from multiple dryers converges.

The combined PDP measurement of multiple dryers is important for a couple of reasons. First, it only takes a small of wet air to ruin the PDP of the air exiting the other dryers and secondly, the dew point spikes from multiple heated desiccant dryers may occur one after the other; thereby producing a poor PDP even though the dryers are operating correctly.

The effect of the dew point spikes can be minimized by operating all the dryers in fixed mode and synchronizing them so they switch towers at the same time. The PDP alarm for heated desiccant dryers should have a sufficient delay to allow time for the dew point spike to go away.

A unique combination of two world-class sensors

Vaisala Dewpoint Transmitter for Compressed Air with Pressure Transmitter DPT146 combines the knowledge of more than 20 years of sensor technology development. Proven measurements from DRYCAP sensor for dew point and BAROCAP sensor for pressure are now combined into one easy-to-use transmitter.

Make more informed decisions

Dew point measurement combined with process pressure measurement offers further unique advantages. When dew point data is coupled with live pressure input, conversions to atmospheric pressure or ppm are available online, leaving no ambiguity in the information. As an example, regulative requirements of medical gas can be fulfilled easily and quickly



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