Envco – Environmental Equipment

High accuracy
The PTB330 series features extremely high accuracy. Class A barometers for the most demanding applications are fine-adjusted and calibrated against a deadweight tester. Class B barometers are adjusted and calibrated using electronic working standards. All the PTB330 barometers come with a NIST traceable, factory calibration certificate.

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.
In addition to instant pressure, the PTB330 also provides the WMO pressure trend and tendency code.

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.

Data transfer
The data can be transferred to a PC by using MI70 Link Interface Software.
You can examine the recorded data easily in a Microsoft® Windows environment and transfer it further to a spreadsheet program, such as Microsoft® Excel, in numeric or graphical format.

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.

Applications
The PTB330 can be used successfully for aviation, professional meteorology, and for demanding industrial pressure measurement applications such as accurate laser interferometric measurement and exhaust gas analysis in engine test benches.

Please read specification sheet and order guide prior to placing an order. Vaisala products are professional grade instruments and have options specific to your application. This information needs to be detailed.