Overview
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- Six models for demanding applications:
- HMT331 for wall mounting
- HMT333 for duct mounting and tight spaces
- HMT334 for high pressures up to 100 bar and vacuum conditions
- HMT335 for high temperatures
- HMT337 for high humidity and meteorological applications
- HMT338 for pressurized pipelines up to 40 bar
- Warmed probe for superior performance in condensing environments
- Shows measurement trends and history graphically
- Corrosion resistant IP65 housing
- NIST traceable (certificate included)
- Optional integrated data logging, with over four years of measured history
- LAN and WLAN communication options
- Compatible with the Vaisala Continuous Monitoring System
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Technical Specifications
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Relative humidity measurement |
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Measurement range
Accuracy at +20 °C (68 °F)
Factory calibration uncertainty
Sensor
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0 ... 100 % RH
± 1.0 % RH (0 ... 90 % RH)
± 1.7 % RH (90 ... 100 % RH)
(+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.)
Vaisala HUMICAP® 180
Vaisala HUMICAP® 180R
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Temperature measurement |
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Measurement range
HMT331
HMT333
HMT334/335/337/338
Accuracy at +20 °C (68 °F)
Sensor |
-40 ... +60 °C (-40 ... +140 °F)
-40 ... +80 °C or -40 ... +120 °C
(-40 ... +176 °F or -40 ... +248 °F)
-70 ... +180 °C (-94 ... +356 °F)
± 0.2 °C
PT100 RTD 1/3 Class B IEC 751
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Other variables available (depends on model) |
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Dewpoint, temperature, mixing ratio, absolute humidity, wet bulb temperature, enthalpy, water vapor pressure.
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Operating environment |
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Temperature
for probe
for transmitter body
with display
Pressure
HMT334
HMT338
HMT333/335/337 |
same as measurement ranges
-40 ...+ 60 °C (-40 ... +140 °F)
0 ...+ 60 °C (+32 ... +140 °F)
0 ... 10 MPa (0 ... 100 bar)
0 ... 4 MPa (0 ... 40 bar)
vapor tight
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Inputs and outputs |
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Operating voltage
with optional power supply module
Power consumption @ 20 °C (Uin24 VDC)
RS-232
Uout2 x 0 ... 1 V/ 0 ... 5 V/
0... 10 V
Iout2 x 0 ... 20 mA V
Analog outputs
current output
voltage output
Digital outputs
Ethernet interface (optional)
Supported standards
Connector
Protocols
WLAN interface (optional)
Supported standards
Antenna connector type
Protocols
Security
Authentication / Encryption
Open / no encryption
Open / WEP
WPA Pre shared key / TKIP
WPA Pre shared key / CCMP (a.k.a. WPA2)
Optional data logger with
real-time clock
Logged parameters
Logging interval
Max. logging period
Logged points
Battery lifetime
Menu languages |
10 ... 35 VDC, 24 VAC
100 ... 240 VAC 50/60 Hz
max. 25 mA
max. 25 mA
max. 60 mA
0 ... 20 mA, 4 ... 20 mA
0 ... 1 V, 0 ... 5 V, 0 ... 10 V
RS-232, RS-485 (optional)
10/100Base-T
RJ45
Telnet
802.11b
RP-SMA
Telnet
WEP 64/128,WPA
max. three with trend/min/max values
10 sec (fixed)
4 years 5 months
13,7 million points per parameter
min. 5 years
English, French, Spanish, German, Japanese, Russian, Swedish, Finnish, Chinese
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Mechanics |
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Probe cable diameter
HMT333
other probes
Material (housing)
Housing classification |
6.0 mm
5.5 mm
G-AlSi 10 Mg (DIN 1725)
IP65 (NEMA 4)
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For complete specifications, please see the brochure or user guide in "Documents".
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Related Services
- Service Center Calibration
Regular calibration ensures that your Vaisala equipment continues to provide accurate, high-quality data. We offer traceable, standards-compliant calibration services for almost all Vaisala products and partner with world-class couriers for rapid, trouble-free return of your equipment.- On-Site Calibration
On-site calibration helps you maximize both reliability and profitability by minimizing costly equipment downtime and ensuring compliance with relevant regulations and standards. Our expert engineers can also replace a range of components, carry out minor repairs, and provide the latest upgrades.- Repair Services
Vaisala repair services include fault tracing and repair or replacement of failed components, as well as final testing to ensure your equipment is functioning properly. Repairs can be carried out on site or at one of our service centers.- Spare Parts
Get rapid access to the spare parts you need to maximize the uptime of your equipment and ensure reliable and accurate operation. In addition to standard spare part delivery, we also offer an express service where parts are shipped within one business day.- Warranty
All Vaisala products and services are covered by a 12-month warranty as standard, with selected products covered for up to 24 months. During this period you benefit from free repair or replacement of faulty equipment. With Vaisala’s extended warranty, you get free repair or replacement for five years.
Documents
- Die Wahl des richtigen Sensors zur Außenfeuchte-messung ist entscheidend für die Wirtschaftlichkeit eines Systems mit freier Kühlung (pdf, 339KB)
- Le choix des capteurs d’humidité extérieurs est crucial pour obtenir un système économique de refroidissement gratuit (pdf, 343KB)
- Choice of outdoor humidity sensors critical to economical free cooling system (pdf, 173KB)
- Optimizing gas turbine performance with precise humidity measurements (pdf, 367KB)
- Humidity and Temperature Transmitters in Automotive Paint Booth Applications (pdf, 40KB)
- HMT330 Broschüre auf deutsch (pdf, 4506KB)
- HMT330系列温湿度变送器产品介绍 (pdf, 1715KB)
- HMT330 combiné Brochure en français (pdf, 1470KB)
- HMT330 combinado Panfleto em português (pdf, 1386KB)
- DNV Type Approved Product Certificate No.: A-11440 (pdf, 1421KB)
- Vaisala Veriteq Continuous Monitoring System Brochure (pdf, 1449KB)
- Measure Monitor and Validate in Life Science Environments (pdf, 456KB)
- HMT330製品カタログ (pdf, 2217KB)
- How to Choose the Right Instrument for Measuring Humidity and Dew Point (pdf, 565KB)
- HMT330データシート (pdf, 2217KB)
- HMT330 Series Datasheet in English (pdf, 1486KB)
- HMT330 Calibration Order Form (pdf, 28KB)
- HMT330選定明細書 (pdf, 1051KB)
- HMT331選定明細書 (pdf, 170KB)
- HMT333選定明細書 (pdf, 196KB)
- HMT334選定明細書 (pdf, 199KB)
- HMT335選定明細書 (pdf, 198KB)
- HMT337選定明細書 (pdf, 202KB)
- HMT337FC選定明細書 (pdf, 211KB)
- HMT337W選定明細書 (pdf, 156KB)
- HMT338選定明細書 (pdf, 198KB)
- HMT330 Order Form Global (pdf, 157KB)
- Vaisala HUMICAP® para medir la humedad relativa (pdf, 313KB)
- Vaisala HUMICAP® para medição de umidade relativa (pdf, 287KB)
- Vaisala HUMICAP Sensor for Measuring Relative Humidity (pdf, 274KB)
- HMT330 Bedienungsanleitung auf Deutsch (pdf, 3222KB)
- HMT330 Bruksanvisning på svenska (pdf, 3219KB)
- HMT330, DMT340, MMT330 Multilingual Quick Guide (pdf, 817KB)
- HMT330 Manuel utilisateur en français (pdf, 3264KB)
- HMT330 Suomenkielinen käyttöohje (pdf, 3290KB)
- HMT330 用户手册 (pdf, 1464KB)
- HMT330 取扱説明書 (pdf, 2490KB)
- HMT330 ИНСТРУКЦИЯ ПО ЭКСПЛУАТАЦИИ (pdf, 2657KB)
- HMT330 User Guide In English (pdf, 2388KB)
- HMT330取扱説明書 (pdf, 2317KB)
- Certified Reliability For The Seas (pdf, 639KB)
- Humidity Measurement in Cleanrooms - The Devil Is in the Details (pdf, 231KB)
- 21st Century 4-stroke Engine Based Power Plants Rely on Vaisala Humidity Measurement (pdf, 285KB)
- Humidity Measurement in Cleanrooms (pdf, 239KB)
- Optimal Timber Drying Conditions at the Korkeakoski Sawmill (pdf, 211KB)
- Strong in Extreme Conditions (pdf, 331KB)
- Cool Down the Environmental Way (pdf, 233KB)
- HMT330 DMT340 MMT330 Wiring Diagram in English (pdf, 358KB)
- POWER-1 Power Supply Module Installation Instructions in English (pdf, 441KB)
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