Technical data

Measurement performance

Dew point

Sensor

DRYCAPâ 180M

Measurement range

−70 … +80 °C (−94 … +176 °F) Td/f

Measurement range for continuous use −70 … +45 °C (−94 … +113 °F) Td/f

Accuracy up to 20 bar/290 psia

±2 °C/±3.6 °F Td/f

See accuracy graph

Accuracy, 20 … 40 bar/290 … 580 psia

Additional inaccuracy +1 °C Td/f

Response time 63 % [90 %] 1):

From dry to wet

5 s [15 s]

From wet to dry

45 s [8 min]

Temperature

Measurement range

0 … +80 °C (+32 … +176 °F)

Accuracy

±0.2 °C at room temperature

Temperature sensor

Pt100 RTD Class F0.1 IEC 60751

Relative humidity

Measurement range

0 … 70 %RH

Accuracy (RH <10 %RH, at + 20 °C)

±0.004 %RH + 20% of reading

Concentration by volume (ppm)

Measurement range (typical)

10 … 2500 ppm

Accuracy (at + 20 °C, 1 bar)

1 ppm + 20% of reading

1)

Tested with sintered filter.

-40

-20

0

20

40

60

-40

-20

0

20

40

60

80

-60

-80

80

Area not recommended for

continuous measurement

Temperature of measured gas (°C)

Wat

er v

apor

satur

ation

line

Accuracy

±2 °C Td/f

Accuracy

±3 °C Td/f

Dew point accuracy vs. measurement conditions

Operating environment

Operating temperature for probe head −40 … +80 °C (−40 … +176 °F)

Operating temperature for probe body −40 … +80 °C (−40 … +176 °F)

Storage temperature

−40 … +80 °C (−40 … +176 °F)

Operating pressure for probe head

0 … 40 bar (0 … 580 psia)

Measurement environment

For air, nitrogen, hydrogen, argon,

helium, oxygen 1), and vacuum

IP rating for probe body

IP66

Mechanical durability of probe head

Up to +180 °C (+356 °F)

Up to 70 bar/1015 psia

1)

Consult Vaisala if other chemicals are present. Consider safety regulations with flammable gases.

Inputs and outputs

Operating voltage

15 … 30 V DC

Current consumption

10 mA typical, 500 mA max.

Digital output

RS-485, non-isolated

Protocols

Modbus RTU

Output parameters

Absolute humidity (g/m3)

Relative humidity (%RH)

Absolute humidity at NTP (g/m3)

Relative humidity (dew/frost) (%RH)

Dew point temperature (°C)

Temperature (°C)

Dew/frost point temperature (°C)

Water concentration (ppmv)

Dew/frost point temperature at 1 atm

(°C)

Water concentration (wet basis)

(vol‑%)

Dew point temperature at 1 atm (°C)

Water mass fraction (ppmw)

Dew point temperature difference (°C) Water vapor pressure (hPa)

Enthalpy (kJ/kg)

Water vapor saturation pressure

(hPa)

Mixing ratio (g/kg)

Compliance

EU directives and regulations

EMC Directive (2014/30/EU)

RoHS Directive (2011/65/EU)

amended by 2015/863

EMC compatibility

EN 61326‑1, industrial environment

Compliance marks

CE, China RoHS, RCM

Mechanical specifications

Connector

M12 5-pin A-coded male

Weight

512 g (18.1 oz)

Probe cable length

2 m (6.56 ft)

Materials

Probe

AISI 316L

Probe body

AISI 316L

Cable jacket

FEP