Definer220 DryCal Precision Flow Calibrator
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | Definer220 |
| Pricing | Available Upon Request |
Overview
The Definer220 DryCal Precision Flow Calibrator is a compact, high-accuracy dry-calibration instrument engineered for primary standard-level flow verification of low-flow gas meters and mass flow controllers (MFCs). It employs patented positive displacement piston technology—commonly referred to as DryCal®—in which a precisely machined, low-friction piston moves within a calibrated cylinder under controlled gas pressure. Each full piston stroke displaces a known, traceable volume; optical encoders capture stroke count and timing with sub-millisecond resolution, enabling direct volumetric flow calculation without reliance on empirical correlations or fluid property assumptions. This fundamental principle ensures intrinsic metrological traceability to the U.S. National Institute of Standards and Technology (NIST), satisfying ISO/IEC 17025 requirements for calibration laboratories performing accredited flow verification. Unlike thermal or differential-pressure-based calibrators, the Definer220 delivers stable, environment-independent accuracy across varying ambient temperature (0–70 °C), humidity (<70% RH, non-condensing), and barometric pressure—making it ideal for field deployment in environmental monitoring stations, semiconductor cleanroom validation, pharmaceutical process gas audits, and third-party testing laboratories.
Key Features
- DryCal® positive displacement measurement architecture—no lubricants, no drift, no zero-shift over time
- Integrated high-stability temperature and absolute pressure sensors for real-time standard volume correction (STP/NTP)
- Backlit graphical LCD display with intuitive menu navigation and dual-unit readout (e.g., sccm & mL/min simultaneously)
- Multiple operational modes: single-cycle, continuous, pulsed, or user-defined averaging (1–100 readings per result)
- Configurable sampling interval: 1–15 seconds per reading, optimized for dynamic MFC response characterization
- Self-contained, battery-operated design with optional AC adapter (220 VAC to 12 VDC); fully portable with rugged soft/hard carry case
- Compliant with RoHS and CE directives; NIST-traceable calibration certificate provided with each unit
Sample Compatibility & Compliance
The Definer220 is validated for use with non-corrosive, non-condensing gases at relative humidity below 70% RH. It supports both pressurized (upstream) and vacuum (downstream) flow configurations via standardized 1/4″ or 3/8″ compression fittings. Its operating pressure range spans 15 psi absolute (≈103 kPa abs), covering typical industrial and laboratory gas delivery systems. All measurements are referenced to standard conditions (0 °C, 101.325 kPa or 25 °C, 101.325 kPa) using built-in thermobarometric compensation. The device meets ISO/IEC 17025:2017 clause 6.5.2 for measurement uncertainty evaluation and is routinely employed in GLP- and GMP-regulated environments where audit-ready documentation and measurement traceability are mandatory. It is not intended for use with reactive, particulate-laden, or saturated vapor streams.
Software & Data Management
DryCal Pro™ software (Windows-compatible) enables full instrument control, automated data acquisition, and compliant reporting. Through RS-232 serial interface (1-meter cable included), users configure test sequences, define pass/fail criteria, generate calibration certificates with NIST-traceable uncertainty budgets, and export timestamped datasets in CSV or XML format. The software supports 21 CFR Part 11-compliant user access controls, electronic signatures, and audit trail logging—including parameter changes, calibration events, and result modifications—ensuring data integrity for FDA-regulated applications. Raw stroke-count data, environmental sensor logs, and calculated flow values are stored onboard and synchronized upon connection.
Applications
- Verification and recalibration of low-flow mass flow controllers (MFCs) in semiconductor ALD/CVD tools and gas cabinets
- Field validation of ambient air samplers, VOC monitors, and EPA Method TO-15/TO-17 sampling trains
- Performance testing of respiratory therapy devices, anesthesia analyzers, and medical gas delivery systems
- Accredited calibration services for ISO/IEC 17025-certified labs supporting environmental, pharmaceutical, and aerospace sectors
- Research-grade flow characterization in microfluidic development, catalyst testing, and fuel cell R&D
FAQ
Is the Definer220 suitable for calibrating thermal mass flow meters?
Yes—when used as a primary reference standard, it provides traceable volumetric flow data required to validate thermal MFM linearity, zero stability, and gas-specific correction factors.
Does it require periodic recalibration by the end user?
No routine user recalibration is needed; however, accredited labs must follow ISO/IEC 17025-mandated recalibration intervals (typically annually), traceable to NIST or equivalent NMIs.
Can it measure bidirectional flow?
No—the Definer220 measures unidirectional flow only, either in compression or suction mode, selected during setup.
What gases are explicitly excluded from use?
Corrosive gases (e.g., Cl₂, NH₃, H₂S), condensable vapors (e.g., solvents above dew point), and abrasive particulate streams are prohibited.
How is measurement uncertainty reported?
Uncertainty budgets—per GUM (JCGM 100:2008)—are generated in DryCal Pro™ and include contributions from piston geometry, encoder resolution, temperature/pressure sensor accuracy, and repeatability.
