Digital Barometer PTB330

Atmospheric pressure measurement utilizing advanced BAROCAP technology

  • Model: PTB330
  • Manufacturer: Vaisala – Finland

Exceptionally accurate barometric pressure readings with low hysteresis and long-term stability under the most challenging conditions — even those in space.

Features 

  • 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 aviation, professional meteorology, laboratories, and demanding industrial applications
  • Corrosion-resistant IP65/IP66 housing, suitable for outdoor and marine environment
  • Multilingual display allows data viewing in English, German, French, Spanish, Swedish, Finnish, Japanese, or Russian.
Category:

Vaisala BAROCAP Digital Barometer PTB330 is designed for a wide range of highend atmospheric pressure measurements. The pressure measurement of PTB330 is based on the Vaisala silicon capacitive, absolute pressure sensor – the Vaisala BAROCAP sensor. It provides high measurement accuracy and excellent long-term stability.

Key benefits

Current and historical data capture

The PTB330 quickly and accurately calculates instant pressure along with WMO pressure trend and tendency code (pressure tendency looking back three hours) for immediate forecasting and longterm modeling. It also stores 12 months of data for review

Added reliability through redundant measurement

Incorporate one, two, or three BAROCAP sensors for redundant pressure measurement. With two or three sensors connected, the unit constantly compares readings to ensure stable, reliable pressure readings

High measurement accuracy and excellent long-term stability

BAROCAP single-crystal silicon material and capacitive structure sensor technology in the PTB330 allows it to consistently and reliably operate over a wide temperature range, even for highly demanding professional meteorology needs.

Installation versatility and maintenance ease

An IP65-rated housing and AC or DC power source means the PTB330 excels in unusual outdoor applications. It can be wall mounted or connected to a standard DIN rail, and includes an easy-detachment mounting plate. A pole installation kit with a rain shield is also available. 

Flexible data communication

An RS232 serial output is standard with optional use of a high-speed RS485 serial line. The PTB330 also offers USB connection to a PC either via a terminal program or Windows® software application. Linear voltage and current output for pressure are also available.

Wired or battery power

Wired or battery power with voltage supply ranges from 10 to 35 VDC, allowing for use in battery-powered applications. An external AC supply enables connection to all universal main AC supplies.

Applications

  • Generating reliable and accurate information regarding potential major changes in weather.
  • Enabling early warning systems to protect lives and property from potentially destructive weather events.
  • Tracking the progress of weather fronts.
  • Predicting upcoming and sudden changes in weather as indicated by changes in barometric pressure.
  • Defining the high- and low-pressure systems for generation of numerical weather models.
  • Automatic reporting of QNH and QFE reading for aviation users

 

Measurement performance
Property Class A Class B
Barometric pressure range 500 … 1100 hPA
Linearity 1) ±0.05 hPa ±0.10 hPa
Hysteresis 1)  ±0.03 hPa ±0.03 hPa
Repeatability 1)  ±0.03 hPa ±0.03 hPa
Calibration uncertainty 2) ±0.07 hPa ±0.15 hPa
Accuracy at +20 °C (+68 °F) 3) ±0.10 hPa ±0.20 hPa
Barometric pressure range 50 … 1100 hPA
Linearity 1) ±0.20 hPa
Hysteresis 1)  ±0.08 hPa
Repeatability 1) ±0.08 hPa
Calibration uncertainty 2) ±0.15 hPa
Accuracy at +20 °C (+68 °F) 3) ±0.20 hPa
Temperature dependence 4)
500 … 1100 hPa ±0.1 hPa ±0.1 hPa
50 … 1100 hPa ±0.3 hPa ±0.3 hPa
Total accuracy −40 … +60 °C (−40 … +140 °F)
500 … 1100 hPa ±0.15 hPa ±0.25 hPa
50 … 1100 hPa ±0.45 hPa
Long-term stability
500 … 1100 hPa ±0.1 hPa/year ±0.1 hPa/year
50 … 1100 hPa ±0.2 hPa/year ±0.2 hPa/year
Miscellaneous
Pressure units hPa, mbar, kPa, Pa inHg, mmH20, mmHg, torr, psia hPa, mbar, kPa, Pa inHg, mmH20, mmHg, torr, psia
Resolution 0.01 hPa 0.1 hPa
Settling time at startup (1 sensor)  4 s 3 s
Response time (1 sensor) 2 s 1 s
Acceleration sensitivity Negligible
Maximum pressure limit 5000 hPa absolute
Maximum measurement rate 5)  10 Hz

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