Vaisala HMT310 Series Humidity & Temperature Transmitter

Features

  • Six models for demanding industrial applications
  • Full 0 … 100 %RH measurement, wide temperature range -40…+180 °C (-40…+356 °F)
  • Pressure tolerance up to 100 bar
  • Excellent performance in harsh conditions; good chemical tolerance
  • Corrosion-resistant IP65/IP66 housing
  • 5-point calibration (certificate included)
  • Two analog outputs, calibrated (certificate included)
  • RS232, ASCII output
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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.

The Vaisala HUMICAP HMT310 series is for demanding industrial applications where compact product design is essential. The measurement stability is excellent. The instrument is easy to integrate, small in size, and insensitive to dust and most chemicals. The HMT310 series features several probe options for different application needs:

  • HMT311 for wall mounting
  • HMT313 for general use
  • HMT314 for high pressures up to 100 bar and vacuum conditions
  • HMT315 for high temperatures
  • HMT317 for high humidity and meteorological applications
  • HMT318 for pressurized pipelines up to 40 bar

Dimensions in mm [in]

Several Outputs, One Connector

HMT310 is powered up with 10 … 35 VDC. It has two analog outputs and an RS-232 serial output in one M12 8-pin connector. The output signal and the supply power travel in the same cable, the only cable connected to the unit.

Chemical Purge

Chemical purge helps to maintain measurement accuracy between calibration intervals. It involves heating the sensor to remove harmful chemicals.
The function can be initiated manually or programmed to occur at set intervals.

A Variety of Features to Choose From

The following optional features and accessories are available for the HMT310 series:

  • Warmed probe and sensor heating for high humidity conditions.
  • Chemical purge for applications risking interference with chemicals in the measuring environment.
  • Calculated humidity quantities.
  • Sensor protection options and probe cable lengths.
  • Mounting kits.
  • Rain shield.

Specification

Measurement Performance
Relative Humidity
Measurement range 0 … 100 %RH
Response time (90 %) at +20 °C (+68 °F) in 0.1 m/s air flow 17 s with grid filter
50 s with grid and steel, netting filter
60 s with sintered filter
Factory calibration uncertainty (+20 °C) ±0.6 %RH (0 … 40 %RH)1)
±1.0 %RH (40 … 97 %RH)1)
Accuracy 2) 3)
at +15 … +25 °C (+59 … +77 °F) ±1 %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
Humidity Sensor Types
HUMICAP 180R Typical applications
HUMICAP 180RC Applications with chemical purge / warmed probe
HUMICAP 180V Catalytic sensor for H2O2 environments
HUMICAP 180VC Catalytic sensor with chemical purge for H2O2 environments
Temperature
HMT311 −40 … +60 °C (−40 … +140 °F)
HMT313 −40 … +80 °C (−40 … +176 °F) or
−40 … +120 °C (−40 … +248 °F)
HMT314, HMT315, HMT317, HMT318 −70 … +180 °C (−94 … +356 °F)
Typical accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F)
Temperature sensor Pt100 RTD Class F0.1 IEC 60751
1) Defined as ±2 standard deviation limits. Small variations possible, see also calibration certificate.
2) Including non-linearity, hysteresis, and repeatability.
3) With HUMICAP 180V and 180VC sensors, accuracy is not specified below −20 °C (−4 °F) operating temperature.
Operating Environment
Operating temperature for electronics −40 … +60 °C (−40 … +140 °F)
Storage temperature −55 … +80 °C (−67 … +176 °F)
Operating Pressure
HMT314 0 … 100 bar
HMT318 0 … 40 bar
HMT317 0 … 10 bar
EMC compliance EN61326-1, Industrial environment
Inputs and Outputs
Two analog outputs, selectable and scalable 0 … 20 mA or 4 … 20 mA
0 … 5 V or 0 … 10 V
1 … 5 V available through scaling
Typical accuracy of analog output at +20 °C ±0.05 % full scale
Typical temperature dependence of analog output 0.005 %/°C (0.003 %/°F) of full scale
Serial output RS-232C
Connections M12 8-pin male connector with RS-232C, current/voltage outputs (two channels) and Uin
Operating voltage 10 … 35 VDC
External load RL < 500
Startup time after power-up 3 s
Minimum Operating Voltage
RS-232C output 10 VDC
Analog output 15 VDC
Probe heating and chemical purge 15 VDC
Pressures above 10 bara (145 psia) 24 VDC
Power Consumption
RS-232 12 mA
Uout 10 V (10 k ) channel 1 & channel 2 12 mA
Iout 20 mA (load 511  ) channel 1 & channel 2 50 mA
Chemical purge at 24 VDC + 220 mA
Warmed probe at 24 VDC + 240 mA
Mechanical Specifications
Transmitter housing material G-AlSi10Mg
Transmitter base material PPS
IP rating IP66
Probe cable length 2, 5, or 10 m (6 ft 7 in, 16 ft 5 in, 32 ft 10 in)
Cable feed through alternatives M12 8-pin male connector with 5 m cable, or 8-pin female screw terminal connector for cable diameter 4 … 8 mm
Sensor protection PPS grid with stainless steel net PPS grid Sintered filter Membrane stainless steel filter H2O2 filter
Spare Parts & Accessories
Rain shield ASM211103
USB cable 238607
PPS plastic grid with stainless steel netting DRW010281SP
PPS plastic grid filter DRW010276SP
Sintered filter AISI 316L HM47280SP
Stainless steel filter HM47453SP
Stainless steel filter with membrane 214848SP
Catalytic H2O2 filter 231865

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