DMT143 gas dew point transmitter

DMT143 gas dew point transmittervaisala(Vaisala)DRYCAP®dew point sensor
Using Vaisala(Vaisala)DRYCAP®sensorDMT143Dew point transmitter is a compact dew point measuring instrument that can be directly installed on * * * *50 bar(725 psia)In the pressure system. vaisala(Vaisala)DRYCAP®Sensor technology has long-term high-performance performance. This sensor is resistant to humid environments, thereforeDMT143The transmitter can perform very well in industrial applications with water splashes, including pipeline cooling during process system failures or start-up phasesNing. The sensor is also highly resistant to particulate impurities, oil and gas, and most chemical gases, and is not sensitive to changes in flow rate.

DMT143 gas dew point transmitterLonger calibration cycle
DMT143The calibration cycle is as long as once every two years. In addition, using Vaisala(Vaisala)ofDM70Handheld dew point meter can be used forDMT143Compare online to confirm its performance without having to disassemble it from the system. If calibration is required, please send it to Vaisala's service center. When the process is running normally, the automatic calibration software is also working online. When the measurement accuracy cannot be guaranteed, the correction work is automatically carried out.

Easy to install
DMT143There are many features to choose from for dew point transmitters, including different output modes, installation options, and alarmsLEDLights, etc. Due to its small size and light weight,DMT143It is very easy and fast to install in small spaces or small-sized pipelines.LEDThe lamp can trigger an alarm for ultra-high dew point, and the factory can set the trigger point in advance using Vaisala'sDM70Handheld watch or onePCThe calculation can also be reset.
DMT143 Dew Point Sensorcharacteristic/benefit
1A compact dew point transmitter suitable for small industrial dryer applications
2Vaisala with automatic calibration function(Vaisala)DRYCAP®Sensor Technology
3The calibration cycle is as long as once every two years
4Dew point measurement range-60... +60ºC(-76...+140 °F)
5Accuracy ±2 ºC (±3.6 ºF)
6Anti condensation and dew condensation
7Fast response time
8, with Vaisala(Vaisala)Handheld dew point meterDM70compatible
9Tracing back to the sourceNISTCalibration of(Including calibration certificate)
10ThroughRS485User port, convenient and fast maintenance and data transmission
11Dew point exceeding *LEDLamp alarm
DMT143 Dew Point Sensortechnical indicators
measurement parameters
dew point temperature
measurement range(typical)
-60 . .. +60 °C (-76 ... +140 °F) Td
Analog output range
option1 -80 . .. +20 °C (-112 ... +68 °F) Td
option2 -80 . .. +20°C (-112 ... +68°F) TdDew point at atmospheric pressure
option 3 Custom Range
Accuracy, in air or nitrogen ±2 °C (±3.6 °F) Td (See the figure below)
When the dew point is below0 °C (32°F)Yes, the transmitter outputs frost points
response time63% [90%]The gas temperature is+20 °CAnd pressure1 bartime
-60 -> -20 °C Td (-76 -> -4 °F Td) 5 s
-20 -> -60 °C Td (-4 -> -76 °F Td) 45 s
PPMvolume concentration
measurement range(typical) 10 . .. 40000 ppm
Accuracy,+20 °C (+68°F), 1 bar1 ppm + 20%The response time of the reading63% [90%]，
DMT143 Dew Point Sensoroperating environment
Tested gas Non corrosive gas
temperature*) -40 . .. +60 °C (-40 ... +140 °F)
relative humidity0 . .. 100 %RH
pressure*) 0 . ..50 bar (725 psia)
Sample gas flow rate No impact on measurement accuracy
*)When the gas temperature drops to-40 °C (-40°F)Or the pressure is high enough50 bar(725 psia)When, the supply voltage must be24 . .. 28 VDC.
DMT143 Dew Point Sensoroutput
analog output(The corresponding range can be changed) 4 . .. 20 mA (3line), 0 . .. 1 V/5 V,1 . .. 5 V
Current output resolution0.002 mA
Voltage output resolution0.3 mV
Typical temperature coefficient0.005 %output range/°C
digital outputRS-485,non-isolatedVaisalaindustrial protocol
cable joint4-needleM8 (IEC 60947-5-2)
DMT143 Dew Point Sensorroutine
sensorVaisala DRYCAP® 180D
Suggested calibration cycle
Within the given accuracy range2 years
Supply voltage during voltage output12 . .. 28 VDC
Supply voltage during current output18 . .. 28 VDC
power supply current
During normal measurement ***Big10mA +load current
In the self diagnosis stage ***Big220 mApulse
Load during current output ***Big500 Ohm
Load during voltage output ***Small10 kOhm
Shell material stainless steel(AISI316L)
Sensor protection Stainless steel sintered filter
mechanical interfaceISO G1/2” orNPT 1/2
Protection levelIP66 (NEMA 4)
Storage temperature range-40 . .. +60 °C (-40 ... +140 °F)
weight pipe thread90g (3.2oz) NPTthread100g (3.5oz)
satisfyEMCstandardEN61326-1Electronic devices are used for measurement, control, and laboratory work
Business environment.

1： Why is dew point measured in the production of lithium batteries?

1. By measuring the dew point value, it can be determined whether the equipment is operating normally;

2. Battery materials need to be kept dry to a certain extent;

3. Only by understanding the dew point value in the box can we ensure product quality;

4. Detecting and controlling humidity (dew point) during the production process can improve product qualification rate, reduce costs, increase output, and improve quality.

5. Lithium metal has excellent oxidizing properties towards water, gas, and oxygen. Therefore, the basic conditions and equipment for producing lithium-ion polymer batteries are essential Very strict requirements, whether in previous testing or assembly, must be carried out in an environment with extremely low water and oxygen concentration.

2： What are the problems encountered during dew point measurement in the production process?

1. Service life: During the production of lithium batteries, the electrolyte contains LiPF6, which generates HF when exposed to moisture. This corrosive gas can cause corrosion and drift in accuracy of most dew point meter probes, greatly reducing the lifespan of the dew point meter.

2. Accuracy: In battery production, the change in dew point humidity value of the manual control box or drying room depends on whether the drying equipment is running normally, the feeding and retrieving process of the control box, the number of workers in the drying room, and the frequency of entry and exit. Because some dew point meters have insufficient sensitivity, it brings a lot of trouble to quality management.

3. Maintenance: The installation position of the dew point meter in the manual control box and drying room is very important, as corrosive gases generated during the production of lithium batteries can directly affect the lifespan and accuracy of the dew point meter.

3： Handling method:

Measuring and controlling humidity (dew point) during the production process of lithium batteries is a very important key parameter. The different working principles and installation methods of dew point meters are very important. Therefore, how to choose and install dew point meters is also a key issue. When our company sells dew point meters, professional engineers will communicate with customers on site to help users choose the appropriate installation location, which can not only reflect dew point accurately and quickly but also ensure the lifespan of the dew point meter.

4： Product recommendation and introduction:

VAISALA's dew point meter products have shown significant performance in humidity measurement in the battery industry's manual control boxes and drying rooms. Our company has taken corresponding anti-corrosion measures for several dew points applied in the battery industry in response to this situation.

In the lithium battery industry, there are dew point meters such as DM70 handheld dew point meter, DMT242 online dew point meter, DMT143L dew point meter, etc. The dew point probe of this product has self heating function, which can instantly heat up to 160-180 ℃ to evaporate the moisture in the probe. LiPF6 will not corrode the probe if it does not encounter moisture. During the heating process, the dew point meter also has zero point automatic correction function to ensure the accuracy of dew point measurement. Mainly, our company has taken corresponding measures to address the corrosion issue on the probe by adding anti-corrosion protection touch on the surface of the probe. Greatly improved the lifespan of dew point meter probes.