Vaisala PTB330 High-Accuracy Digital Barometer

The Vaisala PTB330 provides accurate, stable barometric-pressure measurement for professional meteorology, aviation, maritime systems, laboratories and demanding environmental applications.

  • 500 to 1100 hPa or extended 50 to 1100 hPa pressure range
  • Accuracy up to ±0.10 hPa at +20 °C
  • Choice of one, two or three Vaisala BAROCAP® pressure sensors
  • Optional graphical display with trends and measurement history
  • RS-232 with optional RS-485, RS-422 and analogue outputs
  • WMO pressure trend and tendency calculations
  • IP66 housing without display for demanding installations

High-Accuracy Barometric Pressure Measurement

The Vaisala BAROCAP® PTB330 is a fixed digital barometer designed for dependable atmospheric-pressure measurement across a wide environmental temperature range. It combines high measurement accuracy, low hysteresis and long-term stability with flexible mounting, output and redundancy options.

The PTB330 is suitable for professional weather observation, aviation and maritime systems, calibration laboratories, research facilities and industrial installations where barometric-pressure quality affects safety, calculations or long-term data integrity.

Current product: PTB330 remains an active Vaisala product. Remove the discontinued label and the existing statement that Indigo510 or Indigo520 is its successor. Indigo520 is an alternative platform for different industrial requirements, not a direct lifecycle replacement for every PTB330 application.

Select the PTB330 Pressure Range and Accuracy Class

ConfigurationPerformance at +20 °CRecommended application
500 to 1100 hPa, Class A Accuracy up to ±0.10 hPa; resolution 0.01 hPa Professional meteorology, reference-quality installations and demanding laboratory work
500 to 1100 hPa, Class B Accuracy up to ±0.20 hPa; resolution 0.1 hPa High-quality atmospheric-pressure monitoring where Class A is not required
50 to 1100 hPa, Class B Accuracy up to ±0.20 hPa at +20 °C; resolution 0.1 hPa Applications requiring measurement substantially below the normal atmospheric-pressure range

Choosing the range: most weather and surface-atmospheric applications use 500 to 1100 hPa. Select 50 to 1100 hPa only when the actual measurement must extend below 500 hPa; the wider range has different total-accuracy and stability specifications.

Choose One, Two or Three Pressure Sensors

Sensor configurationMain benefitRecommended when
One BAROCAP® sensor High-accuracy measurement with the simplest configuration Normal professional pressure monitoring without internal redundancy
Two BAROCAP® sensors Continuous comparison between two independent pressure readings Early indication of sensor disagreement is important
Three BAROCAP® sensors Highest level of internal comparison and measurement redundancy Aviation, professional meteorology and critical installations requiring maximum confidence

With two or three pressure sensors, the PTB330 continuously compares their readings against configured difference criteria. This helps identify developing disagreement before it becomes an undetected measurement problem.

PTB330 Measurement Performance

Specification500–1100 hPa Class A500–1100 hPa Class B50–1100 hPa Class B
Linearity ±0.05 hPa ±0.10 hPa ±0.20 hPa
Hysteresis ±0.03 hPa ±0.03 hPa ±0.08 hPa
Repeatability ±0.03 hPa ±0.03 hPa ±0.08 hPa
Calibration uncertainty ±0.07 hPa ±0.15 hPa ±0.15 hPa
Accuracy at +20 °C ±0.10 hPa ±0.20 hPa ±0.20 hPa
Total accuracy from −40 to +60 °C ±0.15 hPa ±0.25 hPa ±0.45 hPa
Long-term stability ±0.1 hPa per year ±0.1 hPa per year ±0.2 hPa per year
Resolution 0.01 hPa 0.1 hPa 0.1 hPa

Use the total-accuracy value covering the full installation temperature range when preparing an uncertainty budget. The room-temperature accuracy alone is not sufficient for an outdoor or widely varying environment.

Select the Interface and Output

Interface or outputRecommended useIntegration check
RS-232 Direct serial connection, configuration and service access Confirm cable length, communication settings and connector arrangement
RS-485 or RS-422 Longer-distance industrial or weather-station communication Confirm protocol, termination, addressing and isolation requirements
4–20 mA or 0–20 mA PLC, recorder and analogue control-system inputs Specify pressure scaling and verify loop power and input loading
0–1 V, 0–5 V or 0–10 V Voltage-input data acquisition and monitoring systems Match the receiving input range, grounding and pressure scaling
USB service connection Local configuration and data transfer to a computer Use the appropriate service cable and supported software

Display, Trends and Historical Data

The optional graphical display provides live pressure readings, trends and convenient local configuration. PTB330 can calculate WMO pressure trend and pressure-tendency codes using the preceding three hours of measurements and can retain historical pressure data for review.

  • Select the display when operators need local readings or troubleshooting without a separate computer.
  • Use serial or analogue integration when pressure data must be recorded by a central weather, automation or data-acquisition system.
  • Confirm the required time synchronisation and external data-retention method for regulated or safety-related records.
  • Remember that the displayed model has a narrower specified operating-temperature range than the display-free housing.

Electrical, Environmental and Mechanical Specifications

SpecificationPTB330
Supply voltage 10 to 35 V DC; other power configurations depend on the ordered version
Pressure units hPa, mbar, kPa, Pa, inHg, mmH₂O, mmHg, torr and psia
Operating temperature without display −40 to +60 °C
Operating temperature with display 0 to +60 °C
Operating humidity 0 to 100 %RH, non-condensing
Maximum pressure limit 5000 hPa absolute
Pressure connection M5 internal thread with a barbed fitting or optional quick connector
Housing protection IP66 without display; IP65 with local display
Housing material Aluminium alloy
Approximate weight 1 to 1.5 kg depending on configuration
Mounting options Wall, DIN rail, panel or pole mounting with the appropriate accessory

Typical PTB330 Applications

ApplicationWhy PTB330 fitsInstallation priority
Professional meteorology High accuracy, WMO calculations and optional sensor redundancy Use a suitable static-pressure head and documented calibration programme
Aviation weather systems Reliable redundant pressure measurement for critical atmospheric calculations Follow the system's approved installation, verification and maintenance procedure
Maritime and offshore systems Stable measurement, robust housing and flexible communication Protect connections from salt, condensation and dynamic wind pressure
Calibration laboratories Low uncertainty and strong long-term stability Control temperature, pressure connections and traceability
Environmental research Historical data and accurate long-term pressure trends Document site elevation, exposure and data-quality controls
Demanding industrial measurement Multiple output options and wide operating-temperature capability Select the range, output and enclosure arrangement around the actual system

Compare Vaisala Barometric Pressure Instruments

Selection pointPTB330PTB330TSPTB110Indigo520
Primary role Fixed high-accuracy digital barometer Portable pressure transfer standard Compact barometer for equipment integration Industrial transmitter platform with barometric-pressure capability
Accuracy and redundancy Class A or Class B with up to three pressure sensors Class A PTB330 package with up to three modules Compact single-sensor measurement Selected according to the complete Indigo configuration
Local interface Optional graphical display MI70 handheld indicator No display Optional touchscreen
Best fit Meteorology, aviation, maritime and critical fixed installations Field comparisons and reference measurements Weather stations, data loggers and OEM equipment Industrial sites requiring Ethernet, relays or multiple compatible probes
Product information Current product Explore Vaisala PTB330TS Explore Vaisala PTB110 Explore Vaisala Indigo520

Calibration and Maintenance

Select the calibration interval from the required uncertainty, environmental exposure, observed drift, instrument history and applicable quality procedure. An optional ISO/IEC 17025 accredited pressure calibration can be specified where formal accredited traceability is required.

For multi-sensor instruments, monitor the internal difference values as part of routine checks. A change in sensor agreement can provide an early indication that inspection or calibration is needed. Pressure tubing, fittings and the static-pressure head should also be inspected because installation faults can affect the reading even when the barometer remains within calibration.

Vaisala PTB330 Supplier and Technical Support in Malaysia

Seacom Process Instruments supplies and supports the Vaisala PTB330 digital barometer in Malaysia for professional meteorology, aviation, maritime systems, calibration laboratories, environmental monitoring and demanding industrial applications.

Our team can help select the pressure range, accuracy class, sensor redundancy, display, power supply, outputs, fittings, mounting accessories and calibration service. We can also review pressure-port placement and integration with the receiving system.

Configuring a PTB330? Send us the application, site elevation, expected pressure range, operating temperature, required uncertainty, redundancy level, electrical outputs, mounting arrangement and calibration requirements.

Download

  PTB330 Series Catalogue   (172.24k)

  PTB330 Order Form   (131.79k)


Specific References

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