Vaisala DPT145 Multiparameter Transmitter

Features

  • Digital output: RS-485 with Modbus
  • Long calibration interval of years
  • Measured parameters: dew point, pressure, temperature
  • The first transmitter to offer online measurement of seven SF6 parameters in one unit
  • Calculated parameters: SF6 density, normalized pressure, dew point in atmospheric pressure, ppm
  • More reliable assessment of the condition of SF6 insulation due to online measurement
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Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

Vaisala Multiparameter Transmitter DPT145 for SF6 gas is a unique innovation that enables online measurement of dew point, pressure, and temperature. It also calculates four other values, including SF6 density. DPT145 is especially well suited for integration into OEM systems.

Key Benefits

Cost-efficiency
Save time and money across the board, from investment and installation to operation and servicing.

Risk-free, greener solution

Online monitoring of gas trends via data collection means there’s no sampling — and no risk of releasing SF6 gas up in the air.

Easy maintenance
No frequent calibration is needed.

 

Specification

Measured Parameters
Dew point −60 … +30 °C (−76 … +86 °F)
Pressure, absolute 1 … 12 bar (14.5 … 174 psi)
Temperature −40 … +80 °C (−40 … +176 °F)
Calculated Parameters
Pressure, normalized to +20 °C
(+68 °F)		 1 … 12 bar (14.5 … 174 psi)
SF6 or SF6/N2 mixture density 0 … 100 kg/m3
Moisture by volume, ppm 40 … 40 000 ppm
Dew point, converted to atmospheric
pressure		 −65 … +30 °C (−85 … +86 °F)
Measurement Performance
Dew point accuracy ±3 °C (±5.4 °F), see graph below
Dew point stability Typical drift < 2 °C (3.6 °F) / 5 years
Pressure accuracy at +23 °C (+73.4 °F) ±0.4 %FS
Pressure temperature dependence ±0.01 bar/10 °C (18 °F)
Pressure stability Typical drift < 1 %FS / 5 years
Temperature accuracy 0 … +40 °C (+32 … +104 °F):
±0.5 °C (± 0.9 °F)
−40 … 80 °C (−40 … +176 °F):
±1 °C (± 1.8 °F)
Density accuracy (pure SF6, 1 … 12 bara) 0 … +40 °C (+32 … +104 °F): ±1 %FS
−40 … +60 °C (−40 … +140 °F):
±2.2 %FS
Typical ppm accuracy
(5 … 1000 ppm, 7 bar)		 ±(7 ppm + 15 % of reading)
Sensor Vaisala MPS1 multiparameter sensor
Sensor Response Time
Pressure Response Time < 1 s
Dew point response time 1)
63 % [90 %] at 20 °C and 1 bar		 −50 ~ −10 °C Tdf: 5 s [10 s] −10 ~ −50 °C Tdf: 10 s [2.5 min]
1) System equilibrium related response time is typically longer.
Inputs and Outputs
Digital outputs RS-485, non-isolated, Vaisala protocol
Modbus RTU protocol
Connector M8 4-pin male
Operating voltage 15 … 28 VDC
20 … 28 VDC in cold temperatures
(−40 … −20 °C (−40 … −4 °F))
Supply current, during normal
measurement		 20 mA
Supply current, during self-diagnostics Max. 300 mA pulsed
Operating Environment
Operating temperature of electronics −40 … +60 °C (−40 … +140 °F)
Operating pressure 1 … 12 bar (14.5 … 174 psi)
Mechanical durability 0 … 50 bar (0 … 725 psi)
Relative humidity 0 … 100 %
Measured gases SF6, SF6/N2 mixture
Storage temperature, transmitter only −40 … +80 °C (−40 … +176 °F)
Storage temperature, shipment
package		 −20 … +80 °C (−4 … +176 °F)
Mechanical Specifications
Housing material AISI316L
Mechanical connection DILO DN20, DILO DN8,
ABB Malmquist, or Alstom G1/2″
compatible connector
Every connection is helium leak tested
at the factory.
Weight (with DILO adapter) 765 g (27.0 oz)
IP rating IP66 1)
1) Weather shield to be used in continuous outdoor installations.
Compliance
EMC compatibility EN 61326‑1, basic electromagnetic
environment
Compliance marks CE, RCM, WEEE
Mechanical Vibration
Vibration (sinusoidal)
IEC 60068‑2‑6		 ±6 g, 5-500 Hz sweep
60 min/axis, 3-axis
Spare Parts and Accessories
Connection cable for the MI70/DM70 handheld 219980
USB connection cable 219690
Protection plug for connector 218675SP
1.5 m shielded PUR cable with 90° connector 231519SP
3 m shielded PUR cable with 90° connector 231520SP
5 m shielded PUR cable with 90° connector 231521SP
10 m shielded PUR cable with 90° connector 231522SP
3 m shielded FEP cable with straight connector 226902SP
Weather shield ASM210326SP

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