KANOMAX Model 6720-DP Handheld Differential Pressure & Air Velocity Meter
| Brand | KANOMAX |
|---|---|
| Origin | China (Liaoning) |
| Model | 6720-DP |
| Pressure Range | –2500 to +2500 Pa |
| Accuracy (Pressure) | ±1.5% of reading ±0.25 Pa |
| Resolution (Pressure) | 0.001 Pa |
| Air Velocity Range (with Pitot Tube) | 0.15–40 m/s |
| Air Velocity Range (with Air Velocity Matrix) | 0.15–15 m/s |
| Accuracy (Velocity) | ±3% of reading ±0.05 m/s (>0.25 m/s) |
| Resolution (Velocity) | 0.01 m/s |
| Display | 4.3-inch full-color capacitive touchscreen |
| Data Storage | 8,000 readings (instrument), 10,000 (mobile app) |
| Battery Life | ~14 h (4 × AA alkaline) |
| Operating Temperature | 0–60 °C (non-condensing) |
| Weight | ~390 g |
| Communication | Bluetooth 4.2, USB data export |
| Compliance | Designed for ISO 14644, ISO 14645, NSF/ANSI 49, and EN 1822 test workflows |
Overview
The KANOMAX Model 6720-DP is a dual-parameter handheld metrology instrument engineered for simultaneous, real-time measurement of differential pressure and air velocity in HVAC, cleanroom, and biosafety applications. It operates on the principles of pitot-static pressure differential conversion (for velocity) and high-stability silicon piezoresistive sensing (for differential pressure), delivering traceable, repeatable results under field conditions. Unlike single-function gauges, the 6720-DP integrates calibrated transduction pathways for both parameters within a single, ergonomic housing—enabling technicians to verify face velocity across biological safety cabinets (BSCs), assess filter integrity via pressure drop across HEPA/ULPA modules, and quantify duct static pressure differentials without instrument switching or recalibration. Its design adheres to fundamental metrological requirements for in-situ environmental monitoring, including thermal drift compensation over its full 0–60 °C operating range and digital zero-stability maintenance during extended battery-powered operation.
Key Features
- Simultaneous dual-parameter acquisition: synchronized logging of differential pressure (–2500 to +2500 Pa) and air velocity (0.15–40 m/s with pitot tube; 0.15–15 m/s with velocity matrix)
- High-resolution 4.3-inch capacitive touchscreen display with ambient-light-adaptive brightness and intuitive icon-driven navigation
- Integrated Bluetooth 4.2 module enabling secure pairing with iOS/Android devices for remote control, live data streaming, and firmware updates
- K-factor calibration adjustment for custom probe configurations—supporting NIST-traceable field verification using certified pitot tubes or multi-point velocity matrices
- On-device statistical processing: automatic calculation and display of min/max/average/accumulated values per measurement session
- Low-power architecture: 14-hour continuous operation on four standard AA alkaline cells; auto-sleep mode activates after 5 minutes of inactivity
- Robust data management: 8,000 internal storage slots with timestamp, location tag (via paired mobile device), and operator ID support
Sample Compatibility & Compliance
The 6720-DP is validated for use with dry, non-corrosive gases—including ambient air, nitrogen, and compressed air—at temperatures up to 60 °C and relative humidity below dew point. It interfaces directly with standardized accessories: stainless-steel pitot tubes (ASTM D3370-compliant), 3×3 and 5×5 air velocity matrices (per ISO 14644-3 Annex B), and flexible silicone differential pressure tubing (1/8″ OD). The instrument meets mechanical and electrical safety requirements per IEC 61010-1:2010 for portable measuring equipment. Its measurement algorithms and uncertainty budgets align with ISO/IEC 17025 clause 7.6 (traceability of measurements) and support GLP/GMP audit readiness when used with KANOMAX’s optional validation kit (certified reference standards, calibration log templates, and uncertainty worksheets).
Software & Data Management
The companion KANOMAX AirFlow Manager mobile application (iOS/Android) provides full instrument control, real-time graphing, and configurable report generation. All stored datasets include embedded metadata: date/time stamp, GPS coordinates (optional), battery level, sensor status flags, and user-defined test IDs. Export formats include CSV (for Excel/LabVIEW integration), PDF (print-ready reports with header/footer branding), and XML (compatible with LIMS platforms). USB-C data transfer enables offline synchronization and firmware version rollback. Audit trail functionality records all parameter changes, calibration events, and data deletions—meeting FDA 21 CFR Part 11 requirements when deployed with organizational electronic signature policies.
Applications
- Biosafety cabinet certification per NSF/ANSI 49: face velocity mapping, inflow/exhaust velocity balance, and alarm threshold verification
- Cleanroom classification (ISO 14644-1/2): differential pressure monitoring across classified zones, HEPA filter leak testing via upstream/downstream ΔP trending
- HVAC commissioning and TAB (Testing, Adjusting, Balancing): duct static pressure profiling, fan performance curve validation, and outdoor air intake quantification
- Pharmaceutical facility qualification: room pressurization mapping for Grade A/B/C/D environments, VAV box stability assessment
- Energy efficiency audits: identifying airflow imbalances, duct leakage estimation via pressure decay methods, and economizer cycle verification
FAQ
Does the 6720-DP require annual factory recalibration?
No mandatory annual recalibration is specified; however, KANOMAX recommends a full functional verification every 12 months using traceable reference standards. Field zero checks and K-factor validation should be performed before each critical test series.
Can the instrument store measurement data without a mobile device?
Yes—the internal memory retains up to 8,000 complete measurement records independently, including all calculated statistics and timestamps.
Is the Bluetooth connection encrypted?
Bluetooth communication uses AES-128 encryption for command transmission and employs authenticated pairing to prevent unauthorized device access.
What is the maximum allowable tubing length between the 6720-DP and a remote pressure port?
For optimal dynamic response and minimal lag, KANOMAX specifies ≤3 meters of 1/8″ ID silicone tubing. Longer runs may attenuate transient pressure signals above 1 Hz.
Does the unit support custom unit conversions (e.g., mmH₂O to in.wg)?
Yes—eight preconfigured pressure units are available (Pa, kPa, mmH₂O, in.wg, psi, bar, mbar, kgf/cm²), with automatic scaling and resolution adaptation per selected unit.
