1. Product Overview
DPT-A3 The dew point transmitter uses thermosolid polymer polymer sensitive capacitors, which are fast response, stable and reliable, and the measurement range is -60 ℃~60℃，Full range of accuracy ±2℃td， This product has automatic calibration of zero point function and automatically performs thermal cleaning, which is extremely stable for long-term use.
2. Performance advantages
1、Brand new polymer thin film sensor technology
2、Gundam +/-2℃td Accuracy measurement
3、 Automatic heating calibration function
4、Super fast response speed and excellent long-term stability
5、Anti-condensation dew, anti-particle pollution, 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 is more than 100 times higher than ordinary humidity sensor capacitors
10、Polymer polymers are acid-resistant, alkali-resistant, water-impregnated, and have very low requirements for the use environment. Please feel free to use.
3. Dimensional drawing (unit: mm tolerance: ±0.5mm)
4. Wiring method
PIN | 1 | 2 | 3 | 4 | 5 |
Signal | 12-24V | RS485+ | GND | RS485- | OUT |
illustrate | power supply 正pole | RS485+pole | power supply 负pole | RS485-pole | Current output |
V. Technical parameters
Technical parameters |
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 Second [40 Second ] |
-30~-60℃td 5 minute [20 minute ] |
Output | Current output (Range can be changed ) | 4~20mA (Three-wire system ) |
Current output 分辨率 | 0.002mA |
Current output 温度漂移 | 0.01% of span/℃ |
Current output 负载 | Not greater than 350 ohm |
power supply | Electric heating | 12~24V/250mA |
Normal measurement | 12~24V/30mA |
Working environment | Operating temperature | -20~70℃ |
Storage temperature | -30~80℃ |
Relative humidity | 0~95%RH |
Sample air flow rate | >1 L/min |
pressure | 0~50bar |
other | shell | Stainless steel |
Protection level | IP65 |
Mechanical component connection | ISO G1/2″ |
Stainless steel 网过滤器 | Filtration level 40-50 um |
Electromagnetic compatibility | conform to IEC 61326-1 |
VI. Application information
1、Working conditions
To ensure normal and stable sensor performance, it is recommended to use temperature range -10 ℃-60℃，Exceeding the recommended range may cause temporary drift of measurement results.This product is not sensitive to light, but is exposed to
In sunlight or ultraviolet radiation, aging is also accelerated.
2、Storage conditions and recovery
For environmentally sensitive electronic components, careful protection is required.Long-term exposure to high concentrations of chemical vapors will cause drift in the measurements of the sensor.Therefore, it is recommended to store the sensor in the original packaging and meet the storage conditions: Temperature range 10 ℃-50℃。During production and transportation, it is necessary to ensure that the sensor is kept away from high concentrations of chemical solvents.Avoid using volatile glue, adhesive tape, self-adhesive stickers, or volatile packaging materials, such as foam plastic bags, foam plastics, etc.
七、特别illustrate
1、Use and personal injury
勿将本产品用于安全保护装置或急停设备上， 以及由于本产品故障可能导致 人身受到伤害的任何应用中；在使用本产品前，请仔细阅读本illustrate 书中的内容； 2、禁止在易燃气体附近使用
It is prohibited to use in places with flammable and explosive gases;
3、Direct contact and sensors are strictly prohibited
To prevent contamination of the wet-sensitive film, avoid fingers directly touching the surface of the component;Sweat can contaminate the wet film and cause performance drift. Please wear anti-static finger covers when contacting the sensor;
4、Avoid chemical reactions
Avoid using in an environment containing the following gases: salt, sulfur dioxide, halogen gas, ammonia, alcohol, glycol ether, aldehyde, etc.
