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Dewpoint transmitter

Vaisala dewpoint transmitter is an ideal choice or industrial applications where there is a need to control dryer performance in low dew points. The DMT340 is remarkably stable in the long term and it has good accuracy. The transmitter's measurement range is wide - it measures dew point temperature from -60 ºC to +60 ºC with an accuracy of ±2 °C. The transmitter has also fast response time. DMT incorporates DRYCAP thin film polymer sensor and auto-calibration software. This a combination makes the transmitter ideal for use in dry ambient. The DRYCAP® sensor is immune to water condensation, particular contamination, oil vapors and most chemicals. Vaisala's unique auto-calibration software corrects the possible dry end error and provides long term stability in dry conditions.

Technical Specs

Model DMT340
Measurement Range Dewpoint temperature: -70 - +80ºC
Temperature: 0 to 80&rdm;C
Sensor Humidity: Vaisala DRYCAP 180M
Temperature: PT100 IEC
Accuracy Dewpoint temperature: ±2ºC at -60 to 80ºC
Temperature: ±0.2ºC at 20ºC
Power supply 10-35 VDC, 24VAC, 100 - 240 VAc 50/60Hz
Output 0-20mA, 4-20mA, 0-1V, 0-5V, 0-10V, RS-232, RS-485(optional)
Relay: 0.5A, 250VAC, SPDT (Optional)
Mechanics Protection: IP65 (NEMA 4X)
Display: LCD with backlight, graphic trend display of any parameter
Remarks DMT362 with small flanged probe
DMT364 for high pressures
DMT367 for With Small Pressure-tight Probe
DMT368 for pressurized pipelines

DMT242SC Sampling Cell with Female Connectors for DMT348
DMT242SC2 Sampling Cell with Swagelok Connectors for DMT348

Data sheet

CatalogueProduct Selection Form

See also
Dewpoint Transmitter for Refrigerant Dryer
The Vaisala HUMICAP® Dewpoint Transmitter DMT132 is an affordable dew point measurement instrument designed to verify the functionality of refrigerant dryers.


Dewpoint Transmitter - OEM
Designed for OEM system integrations. Ideal for dryers and dry air systems.


- Ideal choice for low dew point industrial dryer applications

- Incorporates adv.....
Dewpoint Transmitter for Low Dewpoint
The recently updated DTM152 is designed for measuring low dew point in OEM applications, even down to -80 °C.


- Compact and accurate

- Vaisala DRYCAP® tech.....


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