Vaisala HMD70U Service Manual Page 14
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12
HMT337 Humidity and Temperature Transmitter
for High Humidity Applications
The Vaisala HUMICAP
®
Humidity
and Temperature Transmitter
HMT337 is delivered in one of three
configurations:
• Basic:non-warmedprobefor
moderate humidities
• Withawarmedprobe:fornear-
condensing conditions and dew
point measurement
• Withawarmedprobeandan
additional temperature sensor: for
near-condensing conditions and
relative humidity measurement
True Humidity Readings
in Conditions of
Condensation
The Vaisala unique warmed
probe provides fast and reliable
Features/Benefits
▪
For high-humidity applications
in industry and meteorology
▪
Warmed probe for superior
performance in condensing
environments
▪
Small, stainless steel, vapor-
tight remote probe
▪
For temperatures
-70 ... +180 °C (-94 ... +356 °F)
The HMT337 is the ideal transmitter for the most demanding process and
meteorological measurements.
measurement in environments where
humidity is near saturation. The
warming prevents condensation from
forming on the sensor.
As the probe is warmed, the humidity
level inside it stays below the ambient
level. With accurate temperature
measurement, the ambient dewpoint
can be calculated precisely.
If the relative humidity value is
needed, an additional temperature
sensor is used. The measured
ambient temperature provides
the compensation for calculating
relative humidity and other humidity
parameters.
Many Ways to Install
A tight installation through a process
wall can be achieved with Swagelok
®
fittings. Meteorological installation
kits for outdoor installations and duct
installation kits are also available.
Duct installation kit
Technical Data
Temperature measurement range
-70 ... +180 °C (-94 ... +356 °F)
Accessories
Cable gland and AGRO HMP247CG
Duct installation kit (RH probe) 210697
Duct installation kit (T probe) 215003
Swagelok fittings (NPT and ISO)
for both RH and T probes
Solar radiation shield DTR502B
Meteorological inst. kit HMT330MIK
PC software + cable 215005
USB-RJ45 Serial Connection Cable 219685
Connection cable for HM70 211339
Wall mounting plate (plastic) 214829
Pole installation kit 215108
Rain shield 215109
DIN rail installation set 215094
Dimensions
Dimensions in mm (inches)
ø 12 (0.47)
37.5 (1.48)
79.5 (3.13)
99.5 (3.92)
M9×1
- HUMIDITY / DEW POINT / 1
- PRESSURE / WEATHER 1
- ACC URATE 2
- Humidity 4
- Dew Point 4
- Mounting Options 9
- Graphical Display of 10
- History and 10
- Measurement Trends 10
- Outputs and Power Supply 10
- Options for Every Need 10
- Flexible Installation 11
- For Moderate Humidities 11
- Vaisala HUMICAP® 12
- Performance 12
- Measurement Trends and 12
- Real Time History 12
- 41 (1.6) 13
- 51 (2.0) 13
- 192 (7.56) 13
- 253 (9.96) 13
- 37.5 (1.48) 14
- 79.5 (3.13) 14
- 99.5 (3.92) 14
- Temperature Transmitters 16
- HMP361 for wall mounting 17
- HMP363 for confined spaces 17
- HMP364 for high pressure 17
- HMP365 for high temperature 18
- HMP367 for high humidities 18
- HMP368 for pressurized 18
- Transmitter 22
- Interchangeable Probe 24
- Fast, On-Site Calibration 26
- Measures both Humidity 26
- Resistant to Chemicals 28
- Vaisala INTERCAP 30
- Humidity and Temperature 30
- Transmitter Series HMW80 30
- HVACApplications 32
- Demanding Applications 34
- Unique Warmed Probe 34
- Vaisala HUMICAP® Sensor 34
- Chambers 36
- Probe HMP60 38
- Vaisala HUMICAP 40
- Probe HMP110 40
- Three Probes 42
- MI70 Link 42
- Reliable and Cost-ecient 47
- HVAC Products 47
- Fast and Easy-to-Use 48
- HMK15 Humidity Calibrator 50
- DTR500 Solar Radiation 54
- Versatile Outputs and 61
- (Wireless) Data Collection 61
- Easy Installation 61
- Probe Specifications 62
- Ensure dry 65
- Measure Humidity Directly 66
- DMT345, Accurate in Hot 66
- OEM Applications 70
- Low Maintenance 72
- Dewpoint temperature (°C) 75
- DMT132 Dewpoint Transmitter 76
- DEW POINT 77
- CALCULATED VARIABLES 77
- Indoor Applications 78
- 110 (4 .33) 79
- 85 (3.35) 79
- 33 (1.30) 79
- DSS70A Portable 82
- Sampling System 82
- Sampling Cells for 82
- Pressurized Processes 82
- Online Reliability 86
- Savings Across the Board 86
- Risk-Free, Greener 86
- Solution 86
- The Fruit of Experience 86
- Multiparameter Transmitter 88
- When Moisture is a Problem 89
- Knowledge is Power 89
- Literally 89
- Transmitter Series for Oil 90
- Moisture in Oil 90
- The Vaisala HUMICAP 91
- Hand-Held 91
- R1/2" ISO7/1 92
- Prevent it 95
- Transmitter for Oil 96
- Features/Benefits 100
- Technical Data 101
- 0 ... 2 % 102
- Interchangeable Probes 104
- Demanding OEM Applications 106
- GMM111 Carbon Dioxide Module 108
- Vaisala CARBOCAP 110
- Technology 110
- Two Sampling Methods 110
- Features/Benefi ts 112
- Demand-controlled Ventilation 114
- GMM112 Carbon Dioxide Module 118
- GMM20W Carbon Dioxide Module 120
- Pressure 122
- PTU300 Models 123
- Mechanics 126
- Accessories 126
- Dimensions 126
- IN CONTROLLED ENVIRONMENTS 127
- Take the Lab to the Field 130
- For more information, visit 131
- Standard PTB330TS 132
- PTB210 Digital Barometer 134
- Calculate 137
- Vaisala BAROCAP® 138
- Accuracy and Stability 138
- Applications 138
- Ideal for outdoor 140
- Carefree maintenance 140
- Operating Environment 142
- Available Options 142
- Figure 1 143
- Figure 2 with Process 143
- Valve Actuator and 143
- Test Jacks 143
- Measuring Acoustic 146
- Precipitation 146
- Wind Measurement 150
- Vaisala Service Offering 152
- Accredited Body 153
- Accredited Parameters 153
- Vaisala Filters 154
- Vaisala Filters continued 155
- Vaisala Contact Information 158
- ASIA AND PACIFIC 159
- NORTH AMERICA 159
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