1、Overview
The DPT-A3 dew point transmitter adopts a thermosetting polymer sensitive capacitor, which responds quickly, is stable and reliable, and has a measurement range of -60 ℃~60 ℃, with an accuracy of ± 2 ℃ td in the full range. This product has an automatic zero calibration function and automatic hot cleaning, making it extremely stable for long-term use.
2、Performance advantages
1、New Polymer Thin Film Sensor Technology
2、Accuracy measurement up to+/-2 ℃ td
3、 Automatic heating calibration function
4、Ultra fast response speed and excellent long-term stability
5、Anti condensation and condensation, resistant to particle contamination, oil vapor, and most chemicals
6、Multi point temperature compensation verification before leaving the factory
7、Excellent anti-interference ability
8、IP65 protection level, providing good protection even in harsh environments
9、Low humidity sensitivity should be more than a hundred times higher than that of ordinary humidity sensitive capacitors
10、Polymer has acid resistance, alkali resistance, and water immersion resistance, and has low requirements for the usage environment. Please use with confidence
3、Dimensional drawing (unit: mm tolerance: ± 0.5mm)
4、Connection
PIN | 1 | 2 | 3 | 4 | 5 |
Signal | 12-24V | RS485+ | GND | RS485- | OUT |
illustrate | Positive pole of power supply | RS485+pole | Negative pole of power supply | RS485 pole | current output |
5、Technical Parameter
Technical Parameter |
Measurement parameters | Dew point measurement range | -80~+20℃td (standard) |
Application temperature range | -40~100℃ |
measurement accuracy | Dew point accuracy (air or nitrogen) | ±2℃td (standard) |
response time | 63%[90%] 20℃， 1bar(gauge)，4l/min | -60~-30℃td 20 秒[40 秒] |
-30~-60℃td 5 分钟[20 分钟] |
output | Current output (adjustable range) | 4~20mA (Three-wire) |
Current output resolution | 0.002mA |
Current output temperature drift | 0.01% of span/℃ |
Current output load | not more than 350ohm |
power supply | Electric heating | 12~24V/250mA |
Normal measurement | 12~24V/30mA |
work environment | operation temperature | -20~70℃ |
storage temperature | -30~80℃ |
relative humidity | 0~95%RH |
Sample gas flow rate | >1 L/min |
Pressure | 0~50bar |
other | housing | stainless steel |
Protection level | IP65 |
Mechanical component connection | ISO G1/2″ |
Stainless steel mesh filter | Filter level 40-50um |
electromagnetic compatibility | conform to IEC 61326-1 |
6、Application Information
1、working conditions
To ensure the normal and stable operation of the sensor performance, it is recommended to use a temperature range of -10 ℃ -60 ℃. Exceeding the recommended range may cause temporary drift in the measurement results. This product is not sensitive to light, but prolonged exposure to sunlight or ultraviolet radiation can also accelerate aging.
2、Storage conditions and recovery
For environmentally sensitive electronic components, careful protection is required. Long term exposure to high concentrations of chemical vapor can cause drift in sensor measurements. Therefore, it is recommended to store the sensor in its original packaging and meet the storage conditions: temperature range of 10 ℃ -50 ℃. During production and transportation, it is important to ensure that sensors are kept away from high concentrations of chemical solvents. Avoid using volatile glue, adhesive tape, self-adhesive stickers, or volatile packaging materials, such as foamed plastic bags, foamed plastics, etc.
7、Specification
1、Use and personal injury
Do not use this product on safety protection devices or emergency stop devices, as well as in any application where failure of this product may cause personal injury; Before using this product, please carefully read the content in this manual;
