 |
Humidity
Measurement
Contact ThermX
Southwest at 800-284-3769
for Availability
and Engineering Support.
|
|
Humidity Measurement
Vaisala's wide variety
of relative humidity measurement instruments cover all the applications
from
ventilation to process control in demanding explosive areas. Some
of these products include:
|
|
Vaisala HM70 Hand-held
Vaisala HUMICAP®
Hand-Held Humidity and Temperature Meter
HM70
The HM70 is a user-friendly meter for demanding spot-checking
humidity measurements. The HM70 is ideal for field
checking and calibration of Vaisala's fixed humidity instruments
such as the HMP230 Series Transmitters.
Three probes
are available:
- HMP75 general-purpose
probe
- HMP76 long,
stainless steel probe, especially suitable for spot-checking in
ducts
- HMP77
with a small sensor head at the end of a 5-meter cable, ideal
for difficult-to-reach areas and for on-site
calibration of Vaisala's process transmitters in Environmental
Chambers.
The HM70 features
a multilingual, menu-based user interface, and a clear graphical
LCD display. Three measurement parameters can be displayed and
logged into the meter's memory at the same time. An analog output
option is also available.
Technical
specifications
Measurement range:0...100 %RH
Accuracy against salt solutions
±2 %RH (0...90 %RH)
±3 %RH (90...100 %RH)
Max. accuracy against high quality certified standards
±1 %RH (0...90 %RH)
±2 %RH (90...100 %RH)
Temperature measurement range
HMP75: -20...+60 °C
HMP76: -50...+120 °C
short time: -50...+180 °C
HMP77: -70...+180 °C
|
|
|
Vaisala DM70 Hand-held
Vaisala DRYCAP®
Hand-Held Dewpoint Meter DM70
The DM70 can be used in many industrial spot-checking applications
as well as a one-point calibration check for fixed dewpoint transmitters
such as the DMT242 and DMP248. Ideal for to sample
dry gas flow or compressed air.
Key features
- Vaisala DRYCAP® Sensor with patented autocalibration function
- Low maintenance need due to superior long-term stability
- Sensor withstands condensation
- Fast response, enhanced by Sensor Purge option
- Easy-to-use user interface
- Data can be logged and transferred to a PC via MI70 Link software
- Compact, small and light
- For measurements in very hot and dirty processes, the DSS70A
sampling system is available as an accessory
- For connection to pressurized processes, a variety of sampling
cells are available
- Also a two-pressure sampling cell for measurements in both process
and ambient pressure available
Technical
specifications
Dewpoint measurement range
A-probe: -40...+60 °C (-40...+140 °F)
B-probe: -60...+20 °C (-76...+68 °F)
C-probe (for SF6 gas):
-50...+20 °C (-58...+68 °F)
Accuracy: ± 2 °C (3.6 °F)
Operating temperature: -10...+60 °C (+14...+140 °F),
process temperature up to
+200 °C (+328 °F) using DSS70A Sampling System
Pressure: 0...20 bar (0...290 psig)
|
|
|
Vaisala MM70 Hand-Held
Vaisala HUMICAP®
Hand-Held Moisture and Temperature Meter
for Oil MM70
The MM70 is ideal for the preventive maintenance of oil-filled
systems. It measures moisture in terms of the water activity and
temperature. Water activity directly indicates whether there is
a risk of free water formation. The MM70 features the Vaisala
HUMICAP® Sensor with excellent pressure, temperature and chemical
tolerance.
Key features:
In-line process checking through ball valve,
no need to drain the oil.
- Measurement
is independent of oil type, age and temperature.
- Compatible
with Vaisala's fixed oil moisture instruments.
- Graphical
display, data logging and transfer to PC
- Robust industrial-style
construction.
Technical
specifications:
Water activity measurement range: 0...1 aw
Typical accuracy: ± 0.02
Temperature measurement range: -40...+100 °C (-40...+212
°F)
|
|


|
Vaisala HMI41 Hand-Held
The hand-held
HMI41 indicator is versatile and easy to use. With a choice
of five different probes it gives you flexibility to work in a
variety of applications. The indicator also provides a calibration
option: by using a suitable probe and connection cable, most Vaisala's
humidity transmitters can be easily calibrated at one point.
All five probes
incorporate the Vaisala HUMICAP® Sensor, known for its high
accuracy, reliability and long-term stability.
* Vaisala
HMP41 relative humidity and temperature probe fix-mounted on the
HMI41 indicator
* Vaisala HMP42 for structural humidity measurements from very
small spaces (probe diameter 4 mm)
* Vaisala HMP44 for construction moisture measurements (read more...)
* Vaisala HMP45 with a cable for measurements in ducts and chambers
* Vaisala HMP46 for measurements in high temperatures and places
hard to reach
|
|
|
Vaisala HMP228
Vaisala HUMICAP®
Moisture and Temperature Transmitter
for Oil HMP228
The HMP228 is a fast, reliable and accurate on-line detection
system for water in oil.
Moisture measurements
from lubrication oil can significantly cut maintenance costs and
prolong machine lifetime. The HMP228 measures
water activity and temperature from oil. In connection
with oil, water activity measurement offers several advantages
compared to the traditionally measured variable, parts per million
(ppm). Water activity indicates directly whether there is risk
for free water formation. The measurement is independent of the
type, aging or temperature of the oil.
Technical
specifications
Measurement range: 0...1 aw
Typical accuracy: ± 0.02
Operating temperature: -40...+180 °C (-40...+356 °F)
|
|
|
Vaisala HMT330 Series
Vaisala HUMICAP®
Humidity and Temperature Transmitter Series
HMT330
The top-of-the-line humidity transmitter for
demanding industrial applications. Proven Vaisala HUMICAP®
technology provides reliable measurements. The chemical purge function
helps to maintain the accuracy in high concentrations of chemicals.
The warmed sensor head (available for HMT337) provides true humidity
readings in condensing conditions. The
large display shows measurements both numerically and graphically.
1-year measurement history
is also available. This makes it easy to monitor measurement trends.
The series
consists of six models:
- Vaisala
HMT331 for wall mounting
- Vaisala
HMT333 for ducts and tight spaces
- Vaisala
HMT334 for pressurized processes up to 100 bar
- Vaisala
HMT335 for high temperatures
- Vaisala
HMT337 for high humidities
- Vaisala
HMT338 for pressurized pipelines up to 40 bar
|
|


|
Vaisala HMT300TKM Replaces HMP247T
Vaisala HUMICAP®
Dewpoint Transmitter HMP247T
The Vaisala HUMICAP® Dewpoint Transmitter HMP247T was developed
to monitor the air intake of gas and liquid-fuelled power turbines.
It is ideal for measuring in water vapor
injection applications because the sensor has been
optimized for high humidity environments by utilizing a patented,
warmed sensing probe. Water vapor is added to the intake of the
turbine to increase the mass flow, which in turn increases compression
and electrical power output.
Power turbines
also require exact water vapor injection in the chamber to reduce
pollutant emissions.
The HUMICAP® sensor technology is ideal because of its reliability
in the field. The only suggested scheduled maintenance is annual
calibration.
The HMP247T
has been replaced by the HMT300TMK
Turbine Mounting Kit for Power Turbine Intake Air Measurement
|
|
|
Vaisala HMW61 HMW71 HMT100
Vaisala HUMICAP®
Humidity and Temperature Transmitters HMW61/71
The wall-mounted HMW61 and HMW71 transmitters are designed
for dusty and humid air conditioning applications where
accurate and stable measurement and control of relative humidity
and temperature is required. The transmitters are protected against
dust and sprayed water, meeting IP65 requirements. All the materials
used have been chosen for excellent corrosion resistance. This
makes the transmitters especially suitable for
humid and wet environments such as greenhouses, livestock
farms, indoor swimming pools, or any other wash-down areas.
The HMW61/71
transmitters are available in two models: for humidity measurement
only and for
humidity and temperature measurement. The transmitters are available
with either current
(loop-powered) or voltage output.
Note that
the HMT100 Replaces the HMW61
and HMW71.
|
|


|
Vaisala HMD60 HMD70
Vaisala HUMICAP®
Humidity and Temperature Transmitters
HMD60/70
The duct-mounted HMD60 and HMD70 humidity and temperature transmitters
are designed for use inair conditioning
applications where accurate and stable measurement
of humidity and temperature is required. The transmitters are
easy to calibrate on-site without disturbing the measurement.
The transmitters
incorporate the Vaisala HUMICAP® Sensor, which is known for
its accuracy and long-term stability, negligible hysteresis and
resistance to dust and most chemicals. The HMD60/70 transmitters
are available in two models: for humidity measurement only and
for both humidity and temperature measurement. Both true two-wire
and three-wire models are available.
|
|


|
Vaisala HMW60 HMW70
Vaisala HUMICAP®
Humidity and Temperature Transmitters
HMW60/70
The wall-mounted HMW60 and HMW70 transmitters are designed for
use in air conditioning applications
where accurate and stable measurement of humidity and temperature
is required. They are the ideal choice for demanding energy management
applications. The transmitters are easy to calibrate on-site without
disturbing the measurement.
The transmitters
incorporate the Vaisala HUMICAP® Sensor, which is known for
its accuracy and long-term stability, negligible hysteresis and
resistance to dust and most chemicals. The transmitters are available
in two models: for humidity measurement only and for both humidity
and temperature measurement. Both true two-wire and three-wire
models are available.
|
|
|


|
Vaisala DMT142 Dewpoint Transmitter
- Miniature
size dewpoint transmitter for e.g. small industrial dryer applications
- Vaisala DRYCAP®
technology with auto-calibration
- Long calibration
interval saves maintenance costs
- Dewpoint
measurement range -60 . +60 °C (-76 ... +140 °F), accuracy
±3 °C (±5.4 F)
- Withstands
condensation
- Fast response
time
- Can be installed
directly into systems at 50 bara (725 psia) maximum pressure
- IP65 (NEMA
4) housing protects from dust, dirt and splashed water
- Compatible
with Vaisala DRYCAP® Hand-Held Dewpoint Meter DM70
- NIST traceable
(certificate included)
|
|


|
Vaisala DMT152 Low Dewpoint Measurement
(-80 °C)
- Compact
- Accurate
- Vaisala DRYCAP®
technology with a polymer sensor
- Measures
dewpoint down to -80°C (-112°F
)
- Reduced maintenance
costs due to long calibration interval
- Fast response
timeWithstands condensation
- NIST Traceable
Applications: compressed air, plastics drying, dry chambers, pure
gases, and high-voltage circuit breakers
|
|


|
Vaisala DMT242 Compact Dewpoint
Transmitter
- Ideal choice
for low dewpoint industrial dryer applications and Compressed
Air Lines
- Incorporates
advanced Vaisala DRYCAP® Sensor and enhanced auto-calibration
software
- Long-term
stability in low dewpoints
- Fast response
time
Wide dewpoint measurement range from -60
+60°C (-76
+140°F)
with an accuracy
±2°C (±3.6°F)
- Withstands
condensation
- IP65(NEMA
4) housing provides protection against dust, dirt and splashed
water
- Can be installed
directly into systems at 20 bar maximum pressure
- NIST traceable
(certificate included)
- Compatible
with Vaisala DRYCAP® Hand-Held Dewpoint Meter DM70
|
HOME
|