PTH80 Probe-Type Low Humidity Dew Point Transmitter

The dew point is the temperature at which the moisture in the air becomes saturated and begins to condense. The ambient or process temperature of 100%RH is the dew point temperature. The lower the dew point temperature relative to the ambient temperature, the less likely it is that the gas dryer or gas pipeline will have condensation. In addition, the dew point temperature does not change with the gas temperature. In metal handling, plastic drying and compressed air systems, dew point has become a standard measurement parameter.

       The PTH80 adopts the high molecular film humidity-sensitive capacitor imported from Europe, and special coating technology is used on the surface of the sensor, which is perfectly combined with a high-performance microprocessor, resulting in higher accuracy and better chemical resistance.  The PTH80 is available with an optional stainless steel pore filter for extremely fast response times, and can withstand the erosion of moist gas; It is not contaminated by particulates, oil gas or most chemicals, and is not sensitive to sample gas flow rates. 

Technical Features

Output signal: 4 ... 20mA or RS485

Filter: pore filter, stainless steel sintered filter

Shell material: 316 stainless steel

Temperature range: -40 ... 80℃

Automatic calibration and heating function

Dew point measurement range: -60 ... +60℃


Typical Applications

Electric power SF6 insulating gas dryness monitoring

Battery process gas dryness monitoring


Technical Data

Input and output

Operating voltage

24V DC ±20%

 

Current output

4 ... 20mA  RL < 500 Ohm

Power consumption

30mA (current output)

 

Channel precise: ±0.2%FS

 

15mA (digital output)

Digital output

RS485 (Modbus RTU)

Measurement Parameter

Dew point (frost point)

  

 

 

 

Measurement range

-60 ... +60 ℃ Tdf

 

 

 

Measurement precise 

±℃ Tdf

 

 

 

Calibration error

±0.5℃ Tdf

 

 

 

τ63 response time

10mins (in still oil)

 

 

 

Humiditiy sensitive element

High molecular polymer humidity-sensitive capacitor

 

 


The above precisions are comprehensive precisions, including repeatability, linearity and hysteresis of the measurement, and can be traced to the CNAS standard.


Technical Specification

Wiring connection

The maximum cable diameter of the terminal is 1.0mm2

 

Operating temperature

Circuit: -20 ... 60℃

Shell material 

316 stainless steel

 

 

Probe: -40 ... 80℃

Cable connector

5 core threaded joint

 

Storage temperature

-20 ... 60℃

Probe protection

Stainless steel pore filter

 

Electromagnetic compatibility

EN61326-1  EN61326-2-3

Protection grade

IP65

 

 




Data download:

PTH80 Probe-Type Low Humidity Dew Point Transmitter Product Manual




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