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PTB330 catalogue
Digital Barometer PTB330 Series
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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
| Configuration | Performance at +20 °C | Recommended 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 configuration | Main benefit | Recommended 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
| Specification | 500–1100 hPa Class A | 500–1100 hPa Class B | 50–1100 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 output | Recommended use | Integration 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
| Specification | PTB330 |
|---|---|
| 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
| Application | Why PTB330 fits | Installation 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 point | PTB330 | PTB330TS | PTB110 | Indigo520 |
|---|---|---|---|---|
| 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.
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