www.vaisala.com
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HMP155 Humidity and Temperature Probe
HMP155 with an additional temperature probe and optional Stevenson screen
installation kit.
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: meteorology,
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 by default 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 Measurements
With its fast response time, the
additional temperature probe for the
HMP155 is ideal for measurement
in environments with changing
temperatures. The new membrane
filter fastens RH measurement.
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. For the
additional temperature probe, an
installation kit is available to be
used with DTR502 radiation shield.
Easy Maintenance
The probe can be calibrated using a
pc with a USB cable, with the push
buttons, or with the MI70 indicator.
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