AMAE EE-25Pro Intelligent Dry-Gas Positive Displacement Flowmeter (Calibration Standard)

Overview

The AMAE EE-25Pro Intelligent Dry-Gas Positive Displacement Flowmeter is a primary-standard gas flow calibration instrument engineered for metrological traceability and laboratory-grade accuracy in low-to-moderate flow rate verification. Operating on the principle of precision mechanical displacement—where gas volume is measured via synchronized rotation of calibrated internal rotors—the EE-25Pro delivers high reproducibility across its full operational range of 5–2010 mL/min under standard temperature and pressure (STP: 20 °C, 101.325 kPa). Unlike thermal mass or differential pressure-based flowmeters, this dry-gas positive displacement design eliminates dependency on gas composition, thermal conductivity, or viscosity—making it intrinsically suitable for calibrating critical sampling devices such as air quality samplers, respirable dust cyclones, personal exposure monitors, and portable VOC analyzers. Its compact footprint (185 × 120 × 145 mm) and lightweight construction (1.6 kg) enable seamless integration into mobile calibration carts, field service kits, and fixed metrology labs alike.

Key Features

• Precision-engineered dry-gas positive displacement mechanism with ceramic-coated rotor assembly for long-term dimensional stability and minimal wear-induced drift
• Full-scale accuracy of ±1% FS, verified against NIST-traceable reference standards; individual unit calibration certificate provided with each shipment
• Integrated dual-interface communication (RS-232 and USB 2.0) enabling direct connection to host PCs without external converters or drivers
• Real-time flow display with 0.1 mL/min resolution and auto-ranging capability across five decades (5–2010 mL/min)
• Embedded temperature and pressure sensors (±0.2 °C, ±0.1 kPa) for automatic volumetric correction to STP conditions
• Low-pressure drop design (<1.2 kPa at 2000 mL/min), minimizing backpressure effects on sensitive upstream sampling pumps

Sample Compatibility & Compliance

The EE-25Pro is validated for use with non-corrosive, particle-free gases including ambient air, nitrogen, oxygen, helium, and synthetic calibration mixtures (e.g., CO, NO, SO₂ in inert carrier gas). It is not rated for use with condensable vapors, high-humidity streams (>80% RH), or aggressive media such as chlorine, hydrogen sulfide, or solvent-saturated air. For regulatory alignment, the device supports documentation workflows compliant with ISO/IEC 17025:2017 Clause 6.4 (Equipment) and Clause 7.7 (Ensuring Validity of Results). When operated with AMAE-CalSuite v3.2, audit trails—including operator ID, timestamped calibration events, environmental parameters, and pass/fail status per point—are automatically generated and exportable in CSV or PDF formats for GLP/GMP review.

Software & Data Management

AMAE-CalSuite v3.2 is a dedicated calibration management application designed specifically for the EE-25Pro platform. It enables automated multi-point calibration sequences (up to 12 user-defined setpoints), real-time comparison against reference values, and dynamic pass/fail evaluation based on configurable tolerance limits. All calibration sessions are time-stamped, digitally signed, and stored with immutable metadata—including ambient T/P, flow stability metrics (CV < 0.3%), and instrument serial linkage. The software supports 21 CFR Part 11–compatible electronic signatures when deployed on domain-joined Windows systems with role-based access control. Exported reports conform to ISO 17025 Annex A3 requirements and may be uploaded directly to enterprise LIMS platforms via secure HTTPS API endpoints.

Applications

• Periodic verification and recalibration of personal and area air sampling pumps used in occupational hygiene monitoring (per OSHA Method ID-202, NIOSH Manual of Analytical Methods Chapter 2)
• Validation of flow controllers embedded in continuous emission monitoring systems (CEMS) and ambient air quality stations
• Performance testing of low-flow gas chromatography sample introduction modules
• Traceable calibration of handheld anemometers and micro-flow sensors in HVAC commissioning labs
• Supporting ISO 14644-3 cleanroom airflow uniformity audits through sequential point measurements

FAQ

Is the EE-25Pro suitable for calibrating mass flow controllers (MFCs)?

Yes—provided the MFC operates within the EE-25Pro’s flow range and outputs volumetric flow data at STP. For true mass flow validation, users must input known gas composition to enable density correction in AMAE-CalSuite.
Does the device require annual recalibration by AMAE or an accredited lab?

While the EE-25Pro maintains inherent stability due to its mechanical displacement architecture, ISO/IEC 17025 recommends periodic verification (typically every 12 months) using a higher-tier reference standard. AMAE offers accredited recalibration services with turnaround ≤10 business days.
Can the EE-25Pro operate unattended during overnight calibration runs?

Yes—when connected to a stable PC running AMAE-CalSuite in scheduled mode, the system executes preconfigured protocols autonomously, logs all anomalies, and generates summary reports upon completion.
What accessories are required to integrate the EE-25Pro with AMAE-DESK?

None—the EE-25Pro features native plug-and-play compatibility with AMAE-DESK hardware via USB; no additional adapters, power supplies, or firmware updates are needed.