Crafted for the most demanding conditions, Vaisala has introduced their DMT143L Miniature Dewpoint Transmitter. The DMT143L delivers dependable, stable measurements, making it ideal for industrial dryer applications.
The transmitter encompasses both the Vaisala DRYCAP thin film polymer sensor and auto-calibration software. The DRYCAL 180M sensor is suited for dry gasses and desiccant dryers, while more humid applications, like refrigeration dryers, benefit from the DRYCAP 180S sensor. Each sensor is protected against particulate pollution, water condensation, oil vapor and most chemicals. Able to withstand condensation, the sensor is perfect for low dew point applications where process water spikes, like pipeline condensation during a system failure or start-up, are present.
The DMT143L’s auto-calibration software operates on-line as the process is running. When measurement accuracies are not verified, corrections are made instantaneously. The DMT143L quickly modifies the measurement, amends dry-end drifts and continues to function for utmost productivity.
Specifications
DEW POINT TEMPERATURE
Measurement range(typical)
-60 ... +60 °C (-76 ... +140 °F)
Different analog output scalings available (when the dew point is below 0 °C (32 °F), the transmitter outputs frost point) Accuracy with DRYCAP® 180M
±2 °C (±3.6 °F)
DEW POINT ACCURACY VS. MEASUREMENT CONDITIONS
Response time 63 % [90 %] at +20 °C gas temperature
Flow rate >1 l/min and 1 bar pressure
-60 -> -20 °C Td (-76 -> -4 °F Td) -20 -> -60 °C Td (-4 -> -76 °F Td)
5 s [10 s] 45 s [10 min]
Accuracy with DRYCAP® 180S
±2 °C (±3.6 °F)
Operating Environment
Temperature
0 ... +60 °C (32 ... +140 °F)
higher temperature peaks
Short-term OK
Relative humidity
0 ... 100 %RH
Pressure
0 ... 20 bara (0 ... 290 psia)
Sample flow rate
no effect
Outputs
Analog output Resolution for analog output Typical temperature dependence Serial line for service use
4 ...20 mA ±0.002 mA 0.0008 mA/ °C RS485
General
Sensor DRYCAP® Optimal sensor for refrigeration dryers Operating voltage Power consumption at 24 VDC External load for analog output Probe material (wetted parts)
Sensor protection
Mechanical connection
Electronics housing material Housing classification Storage temperature range
180M DRYCAP® 180S 18 - 28 VDC max. 220 mA max. 500 Ω stainless steel (AISI 316L) stainless steel sintered filter (HM47280) G½” ISO228-1 thread with bonded seal ring (U-seal) stainless steel IP66 -40 ... +60 °C, (-40 ... +140 °F)
Complies with the EMC standard EN61326-1, Electrical equipment for measurement, control and laboratory use - EMC requirements; Industrial environment.
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