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Vaisala
PTB330 Digital Barometer for Professional
Meteorology, Aviation, and Industrial Users

Vaisala BAROCAP® Digital Barometer
PTB330 is a new generation
barometer, designed for a wide
range of high-end atmospheric
pressure measurement. The pressure
measurement of the PTB330 is based
on the Vaisala in-house, silicon
capacitive, absolute pressure sensor
- the Vaisala BAROCAP® Sensor. It
provides high measurement accuracy
and excellent long-term stability.

Features/Benefi ts

  • Vaisala BAROCAP® sensor
  • Accurate measurement
  • Excellent long-term stability
  • Added reliability through
    redundancy
  • Graphical trend display with
    1-year history data
  • Height and altitude corrected
    pressure (QFE, QNH)
  • For professional meteorology
    and aviation, laboratories,
    demanding industrial
    applications

Highly accurate
The PTB330 series is highly accurate.
The Class A barometers for the
most demanding applications are
fi ne-tuned and calibrated against a
high-precision pressure calibrator.
Class B barometers are adjusted and
calibrated using electronic working
standard. All the PTB330 barometers
come with a NIST traceable, factory
calibration certifi cate.
Reliability through redundancy
According to customers’ choice, the
PTB330 can incorporate one, two
or three BAROCAP® sensors. When
two or three sensors are used, the
barometer continuously compares
the readings of the pressure sensors
against one another and provides
information on whether these are
within the set internal difference
criteria. This unique feature
provides redundancy in pressure
measurement.
Thus, users also get a stable and
reliable pressure reading at all times
as well as a pre-indication of when to
service or recalibrate the barometer.

QNH and QFE
The PTB330 can be set to
compensate for QNH and QFE
pressure used especially in aviation.
The QNH represents the pressure
reduced to sea level, based on the
altitude and temperature of the
observation site. The QFE represents
the height corrected pressure of
small differences in altitude, for
example, the air pressure at the
airfield elevation.

Graphical display
The PTB330 features a multi-lingual,
graphical display allowing users to
monitor measurement trends. The
graph is updated automatically while
measuring and it provides a one-year
measurement history. In addition to
instant pressure, the PTB330 also
provides the WMO pressure trend
and tendency codes.

PTB 330
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