HMT360

HMT360 Series Intrinsically Safe Humidity and Temperature Transmitters for explosive environments

The Vaisala HUMICAP® Humidity and Temperature TransmitterSeries HMT360 is the ideal solution for measuring humidity inhazardous areas.

The transmitters operate safely and reliably even in the mosthazardous classifications. The HMT360 transmitters' provenperformance and technology conform with rigorous internationalstandards.

Six interchangeable probe models for a variety ofapplications:

  • HMT361 for wall mounting
  • HMT363 for duct mounting and tight spaces
  • HMT364 for high pressures up to 100 bar and vacuumconditions
  • HMT365 for high temperatures
  • HMT367 for high humidities
  • HMT368 for pressurized pipelines up to 40 bar

Intrinsically safe - the whole transmitter can be installed intothe explosive area Complies with classifications from VTT(ATEX, Europe), FM (USA), CSA (Canada), TIIS (Japan), PCEC(China), VTT (IECEx), and TR CU (EAC: Russia, Kazakhstan andBelarus).

The interchangeable probe module contains all calibrationcoefficients, so a calibrated probe can be switched in the fieldwithout the need to input any data manually.

RELATIVE HUMIDITY

Measurement range 0 ... 100 % RH

Accuracy (including non-linearity, hysteresis, and repeatability)

with Vaisala HUMICAP® 180R for typical applications

at +15 ... +25 °C (59 ... +77 °F)                     ± 1.0 % RH (0 ... 90 %RH)

                                                                     ±1.7 %RH (90 ... 100 %RH)

at -20 ... +40 °C (-4 ... +104 °F)                     ±(1.0 + 0.008 x reading) %RH

at -40 ... +180 °C (-40 ... +356 °F)                 ± (1.5 +0.015 x reading) %RH

with Vaisala HUMICAP® 180L2 for application with demanding chemical environment

at -10 ... +40 °C (14 ... +104 °F)               ± (1.0 + 0.01 x reading) %RH

at -40 ... +180 °C (-40 ... +356 °F)            ± (1.5 + 0.02 x reading) %RH

Factory calibration uncertainty (+20 °C)               ± 0.6 % RH (0 ... 40 %RH)

                                                                         ± 1.0 % RH (40 ... 97 %RH)

(Defined as ±2 standard deviation limits. Small variations possible, see also calibration certificate.)

Response time (90 %) at +20 °C (+68 °F) in still air

with grid filter 17 s

with grid + steel netting filter 50 s

with sintered filter 60 s

TEMPERATURE

Measurement range -70 ... +180 °C (-94 ... +356 °F) (depends on selected probe)

Typical accuracy of electronics at +20 °C (+68 °F)            ±0.2 °C (0.36 °F)

Typical temperature dependence of electronics 0.005 °C/°C (0.005 °F/°F)

Sensor Pt1000 RTD Class F0.1 IEC 60751

Accuracy over temperature range

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