Barometers and Atmospheric Pressure Measurement Instruments
A barometer measures atmospheric pressure. Seacom supplies barometers, barometric pressure transmitters and recording barographs for weather observation, laboratories, marine applications and environmental measurement systems.
Choose an analogue dial for local observation, a digital barometer for electronic measurement, a transmitter for system integration, or a barograph for a continuous paper-chart record. The range includes Vaisala and Sato instruments for different measurement and recording needs.
Choose the Right Type of Barometer
| Instrument type | Main purpose | What to check |
|---|
| Analogue aneroid barometer |
Local atmospheric-pressure indication on a dial |
Scale readability, measuring range, installation altitude and adjustment requirements |
| Digital barometer |
Electronic atmospheric-pressure measurement |
Accuracy, temperature performance, display availability and communication options |
| Barometric pressure transmitter |
Pressure signals for a logger, controller or monitoring system |
Power supply, output signal, scaling and receiving-system compatibility |
| Recording barograph |
Atmospheric-pressure trends recorded on a paper chart |
Recording period, chart range, consumables and maintenance |
Barometer and Barograph Product Selection
| Product | Measurement approach | Application to consider |
|---|
| Vaisala PTB330 |
Digital barometric-pressure measurement |
Precision atmospheric-pressure measurement for weather, laboratory and marine applications. Confirm the required display and output configuration. |
| Vaisala PTB110 |
Barometric pressure transmitter |
Integration into weather stations, environmental monitoring equipment and data-acquisition systems. |
| Sato 7610-20 |
Aneroid pressure dial with glass thermometer |
Local atmospheric-pressure and temperature observation using a mechanical instrument. |
| Sato Baromex 7612-00 |
Analogue pressure dial with digital thermometer |
Local pressure observation with a separate digital temperature indication. |
| Sato NSII-BQ Barograph |
Atmospheric-pressure recording on a paper chart |
Applications requiring a visible record of pressure changes over time. |
Confirm the exact model, configuration and availability before ordering. For an existing installation, provide the instrument model and the measurement or recording functions that must be retained.
Applications for Barometric Pressure Measurement
- Weather observation: Measure atmospheric pressure and follow changes over time.
- Laboratories: Record ambient pressure where it is relevant to a measurement procedure or environmental record.
- Marine applications: Select suitable instruments for atmospheric-pressure observation and weather-system integration.
- Environmental monitoring: Connect compatible pressure transmitters to data loggers or monitoring equipment.
- Local observation and chart recording: Choose a readable dial or recording barograph according to the required record format.
What to Check Before Selecting a Barometer
- Pressure range: Confirm the expected atmospheric pressure at the installation altitude.
- Accuracy and resolution: Display resolution alone does not establish measurement accuracy.
- Operating temperature: Review performance across the actual environmental conditions.
- Display or output: Decide whether you need local indication, an electrical signal, recorded data or a combination.
- Recording method: Choose between a paper chart and a compatible electronic logging arrangement.
- Calibration: Specify any certificate, traceability and periodic checking requirements.
- Installation: Check mounting, environmental protection, pressure-port arrangements and access for servicing.
Installation and Pressure Reference
Atmospheric pressure varies with altitude. A local barometer reading may differ from a weather report that presents pressure corrected to sea level. Before comparing readings, confirm the pressure reference and any correction applied.
Install the instrument according to its instructions. For precision measurement, consider pressure disturbances caused by ventilation systems or wind at the sensing location. Protect the instrument from conditions outside its specified operating limits.
Barometric Pressure or Differential Pressure?
Barometric pressure describes atmospheric pressure measured against an absolute reference. Differential pressure describes the difference between two pressure points, such as adjacent rooms or the two sides of a filter.
For cleanroom pressure relationships, filter monitoring or other process-pressure requirements, explore our pressure measurement instruments . For related recording equipment, see pressure recorders and data loggers .
Frequently Asked Questions
What is the difference between a barometer and a barograph?
A barometer indicates atmospheric pressure. A recording barograph also produces a pressure history, typically by tracing the measurement onto a moving paper chart.
Is a digital barometer always more accurate than an analogue model?
Not automatically. Compare the specified accuracy, measuring range, temperature performance and calibration requirements of the individual instruments. A digital display with more decimal places does not necessarily mean higher accuracy.
Does a barometer with a digital thermometer measure pressure digitally?
Not necessarily. Some instruments combine a mechanical pressure dial with a digital temperature display. Check how each parameter is measured and displayed.
Can a barometer be connected to a data logger?
Yes, if the selected instrument provides an output compatible with the logger. Check the signal type, power supply, wiring and scaling. A mechanical dial barometer does not normally provide an electrical measurement output.
Why does my barometer differ from a weather website?
The two readings may use different pressure references, locations or observation times. Check whether the weather service reports sea-level pressure and whether your instrument displays local atmospheric pressure before considering an adjustment.
Seacom Product Selection and Technical Support
Seacom Process Instruments supplies measurement instruments and provides technical support for product selection, installation requirements and system integration. Our team can help review your application and identify a suitable model, configuration and accessories.
For barometer enquiries, share your application, installation altitude, required accuracy, display or recording preference, and any output or calibration requirements.
Email: seacom@seacom.com.my
WhatsApp: +60 16 208 0697
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