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Humidity
/ TECHNOLOGY DESCRIPTION
Vaisala HUMICAP® Sensor for Measuring
Relative Humidity
In 1973, Vaisala introduced HUMICAP
®
, the world’s first thin-
film capacitive humidity sensor. Since then, Vaisala has
become the market leader in relative humidity measurements,
and thin-film capacitive humidity sensors have developed from
one company’s innovation into a global industry standard.
Box headline here
HUMICAP in Brief
A capacitive thin-film polymer
sensor
Full measurement range
0...100 %RH
Accurate to ±1 %RH
Traceable humidity
measurement
Nearly 40 years on the market
HUMICAP’s Unique Benefits
Excellent long-term stability
Insensitive to dust and most
chemicals
Chemical purge option
for stable measurements
in environments with high
concentrations of chemicals
Sensor heating for
measurements even in
condensing environments
Full recovery from
condensation
Vaisala HUMICAP sensors guarantee
quality and reliability, with their
reputation for accuracy, excellent
long-term stability, and negligible
hysteresis.
How It Works
HUMICAP is a capacitive thin-film
polymer sensor consisting of a
substrate on which a thin film of
polymer is deposited between two
conductive electrodes. The sensing
surface is coated with a porous
metal electrode to protect it from
contamination and exposure to
condensation. The substrate is
typically glass or ceramic.
The thin-film polymer either absorbs
or releases water vapor as the
relative humidity of the ambient
air rises or falls. The dielectric
properties of the polymer film
depend on the amount of absorbed
water. As the relative humidity
around the sensor changes,
the dielectric properties of the
polymer film change, and so does
the capacitance of the sensor. The
instrument’s electronics measure
the capacitance of the sensor and
convert it into a humidity reading.
Typical Applications for
Humidity Measurement
Vaisala’s humidity instruments with
HUMICAP sensors are suitable for
a wide range of applications. From
power and steel to life sciences and
building automation, many industries
need to measure humidity – here are
just a few:
Humidity must be measured and
controlled in many drying processes,
such as those in construction
material and paper manufacturing,
and fluid bed dryers. The humidity
of the process air is a good indicator
of the progression of the drying
process.
Cleanrooms and other critical
environments also require high-
performance environmental
measurements in order to operate
consistently and within
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Inhaltsverzeichnis

Seite 1 - Relative Humidity

4Humidity/ TECHNOLOGY DESCRIPTIONVaisala HUMICAP® Sensor for Measuring Relative HumidityIn 1973, Vaisala introduced HUMICAP®, the world’s first thin-fil

Seite 2 - Humidity Products

13Vaisala Humidity Calibrator HMK15 for multi-point on-site calibrations.Humidity Instrument CalibrationIn calibration, the humidity reading of an ins

Seite 3 - Parameters

www.vaisala.com14HMT330 Series Humidity and Temperature Transmitters for Demanding Humidity MeasurementThe Vaisala HUMICAP® Humidity and Temperature T

Seite 4

15HumidityWide Range of Installation Options The wide variety of measurement probes, several installation accessories, and universal mains and DC powe

Seite 5 - Recommended

16Technical Data °C°C00-80 -60 -40 -20 20 40 60 80 100 120 140 160180-0.7-0.6-0.5-0.4-0.3-0.2-0.10.10.20.30.40.50.60.7Temperature sensor Pt100 RTD Cla

Seite 6

17Ref. B210951EN-E ©Vaisala 2013This material is subject to copyright protection, with all copyrights retained by Vaisala and its individual partners.

Seite 7

18HMT331 Humidity and Temperature Transmitter for Demanding Wall-Mounted ApplicationsThe Vaisala HUMICAP® Humidity and Temperature Transmitter HMT331

Seite 8

19The Vaisala HUMICAP® Humidity and Temperature Transmitter HMT334 is designed for humidity measurement in pressurized spaces or vacuum chambers. Ever

Seite 9

20The Vaisala HUMICAP® Humidity and Temperature Transmitter HMT337 is delivered in one of three configurations:• Basic,withanon-warmedprobeform

Seite 10 - Instruments

21HumidityThe Vaisala HUMICAP® Humidity and Temperature Transmitter HMT338 is designed for pressurized processes.Insert or Remove the Probe while the

Seite 11 - Chemical Purge Minimizes

22HMT331 probe37.5 (1.48)78.5 (3.09)98.5 (3.88)Ø 12 (0.47)M9x1HMT333 probeM22×1.5 orNPT 1/2"120 (4.72)170 (6.69)41 (1.61)ø12 (0.47)HMT334 pro

Seite 12

5For more information, visitwww.vaisala.com or contact us at [email protected]. B210781EN-C ©Vaisala 2012This material is subject to copyright prot

Seite 13 - Inputs and Outputs

23Humiditywww.vaisala.com/[email protected] quality and profitability of your process equals the quality of your measurement.The success of

Seite 14 - Please contact us at

www.vaisala.com24HMT360 Series Intrinsically Safe Humidity and Temperature TransmittersThe Vaisala HUMICAP® Humidity and Temperature Transmitter Serie

Seite 15 - Flexible Installation

25Interchangeable Probes for HMT360 Intrinsically Safe Humidity and Temperature TransmitterDimensionsDimensions in mm (inches) DimensionsDimensions i

Seite 16

26DimensionsDimensions in mm (inches) DimensionsDimensions in mm (inches) DimensionsDimensions in mm (inches) Technical DataHMP365 for high temperatur

Seite 17 - Applications

27Technical DataPerformanceRELATIVE HUMIDITYMeasurement range 0 ... 100 % RHAccuracy (including non-linearity, hysteresis, and repeatability)with Vais

Seite 18 - Process is Running

28115 (4.53)164 (6.46)125 (4.92)39 (1.5)73 (2.9)11 (0.43) 62 (2.4)Classification with Current OutputsEUROPE / VTTEU (94/9/EC, ATEX100a) II 1 G

Seite 19 - HMT335 probe

29Ref. B210956EN-B ©Vaisala 2012This material is subject to copyright protection, with all copyrights retained by Vaisala and its individual partners.

Seite 20 - Measures Up

www.vaisala.com30HMT310 Humidity and Temperature Transmitter Reliable Vaisala HUMICAP® TechnologyThe HMT310 incorporates the latest-generation Vaisala

Seite 21 - Temperature Transmitters

31Technical DataΔ °C°C-0.70.70.60.50.40.30.20.1-0.1-0.2-0.3-0.4-0.5-0.600-60 -40 -20 20 40 60 80 100120140160180-80Electrical ConnectionsTwo analog ou

Seite 22 - HMP364 for high pressure

32www.vaisala.comDimensional Drawings of the HMT310 Humidity and Temperature TransmitterTransmitter body dimensions in mm (inches)Probe dimensions in

Seite 23 - HMP368 for pressurized

6How to Choose the Right Instrument for Measuring Humidity and Dew PointPartial Pressure of Water VaporHumidity is simply water in its gaseous phase,

Seite 24 - OTHER VARIABLES

33Calculate and Convert.www.vaisala.com/humiditycalculatorAvailable also as: The free web based Vaisala Humidity Calculator allows you to calculate s

Seite 25 - Dimensions

www.vaisala.com34Vaisala HUMICAP® Humidity and Temperature Transmitters HMT120 and HMT130 The Vaisala HUMICAP® Humidity and Temperature Transmitters H

Seite 26

35Technical DataHumidityPerformanceRELATIVE HUMIDITYMeasurement range 0 ... 100 %RHAccuracy including non-linearity, hysteresis, and repeatabilitytemp

Seite 27 - The Vaisala HUMICAP

36145721201164639M4; 4 pcs919278Wall Assembly dimensions Remote probe dimensionsø12 [0,47]71 [2,8]Ref. B21 1086EN-E ©Vaisala 2013This material is subj

Seite 29

www.vaisala.com38HMW90 Series Humidity and Temperature Transmitters for High Performance HVAC Applications Wall-mounted Vaisala HMW90 Series HUMICAP®

Seite 30 - Calculate

39Technical DataPlease contact us at www.vaisala.com/requestinfowww.vaisala.com Scan the code for more informationHumidityRef. B211183EN-D ©Vaisala 20

Seite 31 - Available Options

www.vaisala.com40HMD60/70 Humidity and Temperature Transmitters for Ducts in HVAC ApplicationsMeasures both Humidity and TemperatureThe HMD60 and HMD7

Seite 32 - HMT130 THREE-WIRE TRANSMITTER

41Technical DataRef. B210839EN-B ©Vaisala 2012This material is subject to copyright protection, with all copyrights retained by Vaisala and its indivi

Seite 33 - Dimension in mm

www.vaisala.com42HMDW110 Series Humidity and Temperature Transmitters for High-Accuracy Measurements in HVAC ApplicationsHMDW110 Series Humidity and T

Seite 34

7If saturation vapor pressure is reached in air or in a gas mixture, the introduction of additional water vapor requires that an equal amount condense

Seite 35 - BACnet in Brief

43HMW110/112 RH+T transmitters for measurements in wet areasHMD110/112 RH+T transmitters for ductsHMS110/112 RH+T transmitters for outdoor measurement

Seite 36

44ModelsModel number Type Output Special Features Ingress ProtectionHMW110 Wall-mount, RH+T 2-wire, current output Configurable model* IP65 HMW112 Wal

Seite 37 - Resistant to Chemicals

45Find out more at www.vaisala.com/HVAC

Seite 38

www.vaisala.com46HMS110 Series Humidity and Temperature Transmitters for High-Accuracy Outdoor Measurements in Building Automation ApplicationsVaisala

Seite 39

47Technical DataPerformanceRELATIVE HUMIDITYMeasurement range 0 ... 100 %RHAccuracyTemperature range +10 ... +30 °C (+50 ... +86 °F)0 ... 90 %RH ±2 %R

Seite 40

www.vaisala.com48HMDW80 Series Humidity and Temperature Transmitters for Building Automation Applications HMDW80 Series Humidity and Temperature Tran

Seite 41

49HumidityHMW88/89(D) RH+T transmitters for measurements in wet areas 76.9123.7955.581127.360.359Ø4.4Ø4.42032.424HMW82/83 RH+T and TMW82/83 T-only

Seite 42

50Technical DataModelsModel number Type Output Special Features Ingress ProtectionTMW82 Wall-mount, T-only 2-wire, current output IP30TMW83 Wall-mount

Seite 43 - Maintenance

51HumidityRef. B211253EN-B ©Vaisala 2013This material is subject to copyright protection, with all copyrights retained by Vaisala and its individual p

Seite 44

www.vaisala.com52HMS80 Series Humidity and Temperature Transmitters for Outdoor Measurements in Building Automation ApplicationsVaisala INTERCAP® Humi

Seite 45 - Reliable Operation

8Mixing RatioThe mixing ratio (x) is the ratio of water vapor mass to the mass of dry gas. It is dimensionless but often expressed in grams per kilogr

Seite 46

53HumidityTechnical DataPerformanceRELATIVE HUMIDITYMeasurement range 0 ... 100 %RHAccuracyTemperature range +10 ... +30 °C (+50 ... +86 °F)0 ... 90 %

Seite 47 - CALCULATED PARAMETERS

www.vaisala.com54HMD42/53 Humidity and Temperature Transmitters for Ducts in Commercial HVACApplicationsFeatures/Benefits▪Designed for building autom

Seite 48

55Technical DataRelative HumidityMeasurement range 0 ... 100 %RHTypical accuracyTemperature range 0 ... +40 °C (+32 ... +104 °F)0 ... 90 %RH ±3 %RH90

Seite 49 - Low Maintenance

www.vaisala.com56HMM100 Humidity Module for Environmental Chambers The Vaisala HUMICAP® Humidity Module HMM100 is an open frame module for integration

Seite 50

57Technical DataPlease contact us at www.vaisala.com/requestinfowww.vaisala.com Scan the code for more informationHumidityMechanicsService cable conne

Seite 51 - HVACApplications

www.vaisala.com58Vaisala INTERCAP® Humidity and Temperature Probe HMP60HMP60The HMP60 is a simple, durable and cost-effective humidity probe. It is su

Seite 52

59Technical Data PerformanceRELATIVE HUMIDITYMeasurement range 0 ... 100 %RHTypical accuracy temperature range 0 ... +40 °C0 ... 90 %RH ±3 %RH90 ...

Seite 53 - Chambers

www.vaisala.com60Vaisala HUMICAP® Humidity and Temperature Probe HMP110The HMP110 is a trouble-free and cost-effective humidity transmitter with high

Seite 54

61Technical Data Please contact us at www.vaisala.com/requestinfowww.vaisala.com Scan the code for more informationHumidityPerformanceRELATIVE HUMIDIT

Seite 55 - Probe HMP60

www.vaisala.com62HM70 Hand-Held Humidity and Temperature Meter for Spot-Checking ApplicationsThe Vaisala HUMICAP® Hand-Held Humidity and Temperature M

Seite 56

960°C the transmitter electronics should be mounted outside the process and only a suitable high temperature probe should be inserted into the high te

Seite 57 - Probe HMP110

63Technical Data °C°C00-80 -60 -40 -20 20 40 60 80 100 120 140 160180-0.7-0.6-0.5-0.4-0.3-0.2-0.10.10.20.30.40.50.60.7HMP75, HMP76 and HMP77 ProbesMea

Seite 58

www.vaisala.com64Vaisala HUMICAP® Hand-Held Humidity and Temperature Meter HM40 The HM40 is a compact and portable humidity meter at hand everywhere y

Seite 59 - MI70 Link

65Technical DataPlease contact us at www.vaisala.com/requestinfowww.vaisala.com Scan the code for more informationPerformanceRELATIVE HUMIDITYMeasurem

Seite 60

www.vaisala.com66HMI41 Indicator and HMP42/HMP46 ProbesThe Vaisala HUMICAP® Humidity Indicator HMI41 fitted with the Vaisala HUMICAP® Humidity and Tem

Seite 61 - Temperature Meter HM40

67Technical DataHMI41 IndicatorCalculated variables dew point temperature, absolute humidity,wet bulb temperature, mixing ratioResolution 0.1 %RH; 0.

Seite 62

68Technical DataPlease contact us at www.vaisala.com/requestinfowww.vaisala.com Scan the code for more informationAccessoriesTransmitter calibration c

Seite 63

69Get the latest news about technology, application solutions, instrumentation, and measurement practices.» Subscribe at www.vaisala.com/knowledgeIndu

Seite 64 - HMP46 Probe

www.vaisala.com70SHM40 Structural Humidity Measurement Kit SHM40 Structural Humidity Measurement Kit Vaisala HUMICAP® Structural Humidity Measurement

Seite 65

71Technical DataPlease contact us at www.vaisala.com/requestinfowww.vaisala.com Scan the code for more informationHumidityTemperatureMeasurement range

Seite 66 - SUBSCRIBE

www.vaisala.com72HMK15 Humidity CalibratorNo measuring instrument stays accurate by itself. It is essential that the functioning of an instrument is p

Seite 67 - Standard Contents of SHM40

10In a pressurized system a sample pump isn’t needed as the process pressure induces a large enough flow to the sampling cell.When measuring dew point

Seite 68 - HMP40S Probe

73Technical DataPlease contact us at www.vaisala.com/requestinfowww.vaisala.com Scan the code for more informationHumidityGeneralThe standard HMK15 co

Seite 69 - HMK15 Humidity Calibrator

www.vaisala.com74HMP155 Humidity and Temperature ProbeHMP155 with an additional temperature probe and optional Stevenson screen installation kit. Fea

Seite 70

75Technical DataRef. B210752EN-E ©Vaisala 2012This material is subject to copyright protection, with all copyrights retained by Vaisala and its indivi

Seite 71

www.vaisala.com76DTR500 Solar Radiation and Precipitation ShieldsThe Vaisala Solar Radiation Shield Series DTR500 are available in either a 5-, 9- or

Seite 72

77Technical DataRef. B210906EN-D ©Vaisala 2012This material is subject to copyright protection, with all copyrights retained by Vaisala and its indivi

Seite 73 - Precipitation Shields

www.vaisala.com78HMT330MIK Meteorological Installation Kit10095908580751234 56 7warmed proberegular probe The Vaisala Meteorological Installation Kit

Seite 74

79Technical DataRef. B210944EN-D ©Vaisala 2012This material is subject to copyright protection, with all copyrights retained by Vaisala and its indivi

Seite 75

www.vaisala.com80HMT300TMK Turbine Mounting Kit for Power Turbine Intake Air MeasurementThe Vaisala HUMICAP® Turbine Mounting Kit HMT300TMK is develop

Seite 76 - Dimensions in mm (inches)

11Humidity sensors from Vaisala.The Right Humidity Instrument for the JobNo matter what the application, the total range of gas temperatures and expec

Seite 77

12Vaisala HUMICAP® Humidity and Temperature Transmitter Series HMT330 is a flexible product family designed for demanding industrial applications.clea

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