Dew point meter Vaisala small dew point transmitter

【DMT143Dew point meter Vaisala small dew point transmitter】Basic description

Vaisala DRYCAP ® dew point sensor
Using Vaisala DRYCAP ® The DMT143 dew point transmitter of the sensor is a compact dew point measuring instrument that can be directly installed in pressure systems up to 50 bar (725 psi).

Vaisala DRYCAP ® Sensor technology has long-term high-performance performance. This sensor is resistant to humid environments, so the DMT143 transmitter can perform very well in industrial applications with water splashes, including pipeline condensation during process system failures or start-up phases. 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.

The calibration cycle of DMT143 is longer, with a calibration cycle of up to once every two years. In addition, by using Vaisala's DM70 handheld dew point meter, DMT143 can be compared 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.

Easy to install
The DMT143 dew point transmitter has many features to choose from, including different output modes, installation options, and alarm LED lights. Due to its compact size and light weight, DMT143 can be easily and quickly installed in small spaces or small-sized pipelines. The LED light can trigger an alarm for ultra-high dew point, and the factory can set the trigger point in advance. It can also be reset using Vaisala's DM70 handheld meter or a PC meter. 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.

【DMT143Dew point meter Vaisala small dew point transmitter】Product Features

A compact dew point transmitter suitable for small sizes
Application of industrial dryer
Vaisala with automatic calibration function
（Vaisala）DRYCAP ® Sensor Technology
The calibration cycle is up to once every two years
Dew point measurement range -60...+60 º C
（-76...+140 °F）
Accuracy ± 2 º C (± 3.6 º F)
Anti condensation and dew condensation
Fast response time
? Handheld dew point meter with Vaisala
DM70 compatible
Traceability to NIST calibration (including calibration certificates)
Convenient and efficient through RS485 user port
Maintenance and data transmission
LED light alarm with dew point exceeding *

DMT143 Parameter Specifications

measurement parameters
dew point temperature
Measurement range (typical) -60 .. +60 °C （-76 ... +140 °F） Td
Analog output range
Options 1-80 .. +20 °C （-112 ... +68 °F） Td
Options 2-80 +20 ° C (-112...+68 ° F) Td dew point at atmospheric pressure
Option 3 Custom Range
Accuracy, ± 2 ° C (± 3.6 ° F) Td in air or nitrogen (see figure below)
When the dew point is below 0 ° C (32 ° F), the transmitter outputs a frost point

Response time 63% [90%], gas temperature at+20 ° C and pressure at 1 bar
-60 -> -20 °C Td （-76 -> -4 °F Td） 5 s
-20 -> -60 °C Td （-4 -> -76 °F Td） 45 s
PPM volume concentration
Measurement range (typical) 10 .. 40000 ppm
Accuracy,+20 ° C (+68 ° F), 1 bar 1 ppm+20% reading

Operating environment
The tested gas is a non corrosive gas
Temperature *) -40 .. +60 °C （-40 ... +140 °F）
Relative humidity 0 .. 100 %RH
Pressure *) 0 .. 50 bara （725 psia）
The flow rate of the sample gas has no effect on the measurement accuracy
*When the gas temperature drops to -40 ° C (-40 ° F) or the pressure rises to 50 bar
At 725 psi, the supply voltage must be 24 .. 28 VDC。

output
Analog output (corresponding range can be adjusted)
Change)
4 . 20 mA (3 wires), 0 .. 1 V/5 V,
1 . .. 5 V
Current output resolution 0.002 mA
Voltage output resolution 0.3 mV
Typical temperature coefficient 0.005% output range/° C
Digital output RS-485, non isolated Vaisala industrial protocol
Cable connector 4-pin M8 (IEC 60947-5-2)

regular
Sensor Vaisala DRYCAP ® 180D
Suggested calibration cycle
Within the given accuracy range, 2 years
The supply voltage during voltage output is 12 .. 28 VDC
The supply voltage during current output is 18 .. 28 VDC

power supply current
During normal measurement, the maximum current is 10mA+load current
Maximum 220 mA pulse during self diagnosis phase
The maximum load during current output is 500 Ohm
When the voltage is output, the load is minimized by 10 kOhm
Shell material stainless steel (AISI316L)
Sensor protection stainless steel sintered filter
Mechanical interface ISO G1/2 "or NPT 1/2
Protection level IP66 (NEMA 4)
Storage temperature range -40 degrees Celsius .. +60 °C （-40 ... +140 °F）
Weight pipe thread 90g (3.2oz)
NPT thread 100g (3.5oz)
Compliant with EMC standard EN61326-1, electronic devices are used for measurement, control, and laboratory work
Business environment.

Attachment
DM70 connection cable 219980SP
USB cable 219690
sampling room
Basic Sampling Room DMT242SC
Equipped with a Swagelok 1/4 'male sampling chamber DMT242SC2
Sampling chamber DSC74SP with quick connector and leakage screw
Dual pressure sampling chamber DSC74BSP
Cooling/air duct coil DMCOILSP
Please refer to DM70/Portable Sampling System and Sampling Unit for more information on sampling rooms
Circuit powered external display unit 226476
Circuit powered external display unit with relay 234759

【 DMT143 】 Scope of application

Very suitable for all small compressed air dryers, plastic dryers, and other OEM applications.