RainWise BAROP Barometric Pressure Sensor

Overview

The RainWise BAROP Barometric Pressure Sensor is a high-stability, silicon-based transducer engineered for continuous, field-deployable atmospheric pressure monitoring in meteorological, environmental, and industrial applications. It operates on the principle of piezoresistive sensing, where applied pressure induces minute mechanical strain in a micro-machined silicon diaphragm, resulting in proportional resistance changes measured via a precision Wheatstone bridge circuit. This architecture delivers robust performance across extreme ambient conditions while maintaining traceable calibration against NIST-traceable standards. Designed for integration into automated weather stations (AWS), environmental monitoring networks, and altitude-compensated process control systems, the BAROP sensor provides real-time barometric data with minimal thermal hysteresis and low power consumption—critical for solar- or battery-powered remote deployments.

Key Features

• High-reliability MEMS silicon pressure sensing element with hermetically sealed reference cavity
• Wide operational temperature range (−40 °C to +60 °C) enabling deployment in arctic, desert, and tropical environments
• Stable output over time: drift ≤ ±2.5 mbar over any six-month interval under nominal operating conditions
• Digital output compatibility via analog voltage (0–5 VDC) and optional RS-485 Modbus RTU interface
• IP66-rated enclosure with UV-stabilized polycarbonate housing and stainless-steel pressure port for outdoor durability
• Factory-calibrated with individual calibration certificate including temperature-compensated error profile

Sample Compatibility & Compliance

The BAROP sensor measures dry, non-corrosive atmospheric air without requiring sample conditioning or filtration under standard ambient conditions. It is not intended for use with aggressive gases, saturated vapors, or particulate-laden airstreams. The device complies with IEC 61326-1:2013 for electromagnetic compatibility (EMC) in industrial environments and meets RoHS Directive 2011/65/EU requirements. While not certified for SIL or ATEX applications, its design supports integration into systems compliant with ISO 9001 quality management frameworks and aligns with measurement traceability requirements outlined in ISO/IEC 17025 for accredited environmental laboratories. Calibration intervals are recommended every six months for applications requiring metrological assurance per ISO 5725 guidelines.

Software & Data Management

The BAROP interfaces seamlessly with RainWise’s proprietary WeatherLink software suite and third-party SCADA platforms supporting Modbus RTU protocol. Raw pressure values are transmitted at user-configurable sampling intervals (1 s to 30 min), with built-in linearization and temperature compensation applied onboard. Data logs include timestamped readings, internal temperature diagnostics, and status flags for out-of-range or fault conditions. For regulated environments, optional firmware upgrades support audit-trail logging and read-only configuration access—features aligned with FDA 21 CFR Part 11 principles when deployed as part of validated environmental monitoring systems (e.g., HVAC pressure differential tracking in cleanrooms per ISO 14644-3).

Applications

• Meteorological observatories and national weather service auxiliary stations
• Aviation ground support systems for altimeter setting verification
• Environmental impact assessments requiring long-term barometric trend analysis
• Indoor air quality (IAQ) monitoring networks incorporating pressure-differential ventilation control
• Calibration reference instruments in metrology labs performing intercomparisons against primary barometers
• Research-grade atmospheric boundary layer studies involving turbulence and microscale pressure fluctuations

FAQ

Is the BAROP sensor suitable for underwater or submerged installations?
No. It is designed exclusively for atmospheric pressure measurement in ambient air. Submersion or exposure to liquid ingress will damage the sensing element and void warranty.

Does the sensor require periodic zeroing or field recalibration?
No routine zeroing is required. Its factory calibration includes multi-point temperature compensation; however, biannual verification against a certified reference standard is recommended for critical applications.

Can the BAROP be integrated with Campbell Scientific or Onset HOBO data loggers?
Yes—via its analog voltage output (0–5 VDC, scaled to full-scale pressure range) or RS-485 interface using standard Modbus function codes (e.g., Read Holding Registers).

What is the expected service life under continuous outdoor operation?
With proper mounting (shielded from direct solar loading and precipitation ingress), typical service life exceeds 10 years based on accelerated life testing per MIL-STD-810G methods.