Vaisala HUMICAP® Humidity and Temperature Probe HMP1550 pages

www.vaisala.com
HMP155 Humidity and Temperature Probe
HMP155 with a new, stable HUMICAP®180R sensor and an additional temperature
probe.
Features/Benefits
Vaisala HUMICAP®180R sensor
- superior long-term stability
Optional warmed humidity
probe
Plug-and-play
Chemical purge
USB connection for service use
Installation kits for DTR13 and
DTR502 radiation shields and
also for a Stevenson screen
Weather-proof housing IP66
New, fast temperature probe
Different output possibilities:
voltage, RS-485, resistive Pt100
Applications: meteorological
applications, aviation and road
weather, instrumentation
New probe for reliability
The new Vaisala HUMICAP® Humidity
and Temperature Probe HMP155
provides reliable humidity and
temperature measurement.
Long-term stability
The HMP155 has a new generation
Vaisala HUMICAP®180R sensor that
has excellent stability and withstands
well harsh environments. The probe
structure is solid and the sensor is
protected with a sintered teflon filter,
which gives maximum protection
against liquid water, dust, and dirt.
Warmed probe and high
humidity environment
Measuring humidity reliably is
challenging in environments
where humidity is near saturation.
Measurements may be corrupted
by fog, mist, rain, and heavy dew. A
wet probe may not give an accurate
measurement in the ambient air.
This is an environment to which
Vaisala has designed a patented,
warmed probe for reliable
measuring. As the sensor head is
warmed continuously, the humidity
level inside it stays below the
ambient level. Thus, it also reduces
the risk of condensation forming on
the probe.
Fast temperature
measurement
What’s more, with its fast response
time, the additional temperature
probe for the HMP155 is ideal for
measurement in environments with
changing temperatures.
Long lifetime
Protecting the sensor from scattered
and direct solar radiation, and
precipitation will increase its lifetime.
Thus, Vaisala recommends installing
the HMP155 in one of the following
radiation shields: DTR503, DTR13, or
a Stevenson screen.
Easy maintenance
The probe can be calibrated using a
pc with a USB cable, with the push
buttons, or with the MI70 indicator.