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Products Temperature Dew Point Transmitter

Vaisala Dew Point and Pressure Transmitter for Compressed Air Measurement - DPT146
 
Vaisala

Model: DPT146

DPT146 for compressed air measurement makes monitoring compressed air simple and convenient. The DPT146 measures both dew point and process pressure simultaneously, and is the ideal choice for anyone using or monitoring compressed air.


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Features

• The first transmitter that monitors both dew point and process pressure
• A simple and convenient transmitter for monitoring of compressed air
• Highly accurate humidity information thanks to dew point data coupled with live pressure input
• Proven sensor technology
• Compatible with Vaisala Hand-Held Meter DM70 for easy spot checking, local display and data logging

Output and Performance

• Dew Point: -70 to +30°C
• Pressure: 1 to 12bar
• Digital output RS-485 with Modbus

Parameters

Measured Parameters
Dew point: -70 to +30°C
Pressure, absolute: 1 to 12 bar (14.5 to 174 psi)
Temperature (available if output RS-485 only selected): -40 to +80°C

Calculated Parameters
ppm moisture, by volume: 1 to 40 000 ppm
Dew point, converted to atmospheric pressure: -75 to +30°C

Measurement Performance
Sensor: Vaisala MPS1 multiparameter sensor
Dew point accuracy: ±2°C
Pressure accuracy at 23°C: ±0.4 %FS
Pressure temperature dependence: ±0.01 bar / 10 °C
ppm accuracy (7 bar): ±(14 ppm + 12 % of reading)

Temperature Accuracy
±0.5°C from 0 to 40°C  
±1°C from -40 to 80 °C

Sensor Response Time
Pressure response time: <1s
Dew point response time 63 % [90 %] at 20 °C and 1 bar: -50 → -10°C Tdf 5s [10s]; -10 → -50°C Tdf 10s [2.5 min]

Inputs and Outputs
Accuracy of analog outputs: ±0.01 V / ±0.01 mA
Digital output: RS-485, non-isolated, Vaisala protocol, Modbus RTU protocol
Connector: 4-pin M8

Operating Voltage
Current output: 21 to 28 VDC
Voltage output and/or use in cold temperatures (-40 to -20°C): 20 … 28 VDC
RS-485 only: 15 to 28 VDC

Analog Outputs (2 Channels)
Current output: 0 to 20 mA, 4 to 20 mA
Voltage output: 0 to 5 V, 0 to 10 V

Supply Current
During normal measurement: 20 mA + load current
During self-diagnostics: 300 mA + load current

External Load for
Current output: Max. 500 Ω
Voltage output: Min. 10 kΩ

Mechanical Specifications
Housing material: AISI316L
Mechanical connection: ISO G1/2 in, NPT 1/2 in, UNF 3/4 in-16
Recommended calibration interval: 2 years
Sensor protection: Mesh filter AISI303, grade 18 μm
Weight (ISO1/2"): 190 g (6.70 oz)

Please refer to product's datasheet (PDF)
Product Dimensions (mm): 128.5 x 30 x 30
Package Dimensions (mm): 0 x 0 x 0
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