Dew Point Transmitter

Vasthi Instruments' Dew Point Transmitter is the ideal measurement device for continuous dew point measurement. It has a precise dew point estimation down to -60°C Td (-76°F Td).

The Dew Point Transmitter utilizes microprocessor-based circuitry to convert sensor signals using psychometric equations. The device is assembled in a rugged handheld IP-65 body with quick-disconnect tubing couplings.

The device also has an internal sensor manifold for accurate dew point measurement and uses an RS485 interface (Modbus RTU). The device is equipped with a dedicated input to maintain line pressure.

The powerful metal encasing (Aluminum or Treated steel) ensures extreme durability of the device.

FEATURES :

Analog output 4-20 mA for dew point
Condensation insensitive
Fast adjustment time
Pressure resistant up to 350 bar(special version)
RS485 RTU interface
The higher resolution of the sensor signal history graphical data
Sensor diagnosis is on-site with a mobile device.
Readable via Modbus:
Pressure dew point [°Ctd.]
Temperature [° C]
Rel. humidity [% RH]
Moisture content V / V [ppmV / V]

Model No	V smart Tdx Series
Sensor technology	Capacitive Thin Film Polymer
Measuring Ranges	(-40 to +30), (-60 to +30),( -80 to +30) & (-100 to +30)
Monitoring Parameter	Dew Point, RH, Temperature & Moisture
Resolution	0.1 % Deg. C
Accuracy	+/- 2 FS
Linearity	+/- 1 %
Display	Optional
Operating power	18- 24 DC
Analog Output	4-20 mA
Digital Output	RS 485/USB
Display	Local LED Display

Q. Can we fit the transmitter directly into the pipeline?

A. Yes, you can.

2. What does the dew point transmitter measure?

It measures pressure dew point (°C Td), temperature, relative humidity (% RH), and moisture content with high precision.

3. What outputs and communication does it support?

It includes analog 4–20 mA output and RS485 (Modbus RTU) digital communication for remote monitoring and integration.

4. Is it suitable for industrial continuous monitoring?

Yes — designed for continuous online dew point and moisture monitoring in industrial processes and gas pipelines.

5. What are the key features of this transmitter?

Features include condensation-insensitive sensor, fast response, robust metal housing, and high-accuracy dew point measurement down to −60°C Td. Vasthi Instruments

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