KANOMAX Model 6850 Handheld Differential Pressure Meter

Overview

The KANOMAX Model 6850 Handheld Differential Pressure Meter is a precision-engineered instrument designed for high-resolution differential pressure measurement in HVAC commissioning, cleanroom validation, fume hood performance testing, and laboratory ventilation system diagnostics. It operates on the principle of piezoresistive pressure transduction, delivering stable, low-drift measurements across its full −2500 to +2500 Pa range. Unlike conventional analog gauges or basic digital manometers, the Model 6850 integrates real-time calculation of derived parameters—including air velocity (via Pitot tube input) and volumetric airflow—based on ISO 16813 and ASHRAE Guideline 12 compliant algorithms. Its dual-sensor architecture enables simultaneous reference and test port sampling, minimizing thermal drift and improving long-term repeatability. The device meets IEC 61000-4 electromagnetic compatibility standards and is calibrated traceable to NIM (National Institute of Metrology, China), with documentation supporting ISO/IEC 17025-compliant calibration intervals.

Key Features

• Precision piezoresistive differential pressure sensor with 0.1 Pa resolution and ±0.5% of reading ±1 Pa accuracy
• Integrated Pitot tube interface enabling direct wind speed calculation from 0.20 to 60.0 m/s (±1.5% at 10.0 m/s)
• Real-time airflow volume computation up to 999,999 m³/h using user-configurable duct geometry and area inputs
• True-color 3.5-inch LCD display showing differential pressure, velocity, and volumetric flow simultaneously
• Onboard data logger storing up to 10,000 timestamped records with automatic metadata (date/time, unit, sensor ID)
• USB mass storage mode for direct export to FAT32-formatted flash drives—no proprietary software required
• Extended battery life (>15 hours on four AA alkaline cells) with optional DC 5 V AC adapter support
• Rugged ABS housing rated IP54 for dust and splash resistance; operating temperature range 0–60 °C (non-condensing)

Sample Compatibility & Compliance

The Model 6850 is intended exclusively for clean, dry, non-corrosive gases—primarily ambient air and compressed air systems. It is not rated for use with liquids, vapors, or aggressive media such as chlorine, ammonia, or solvents. All internal wetted parts are constructed from stainless steel (316L sensing diaphragm) and medical-grade silicone tubing (included). The instrument complies with RoHS 2011/65/EU and CE marking requirements under the Low Voltage Directive 2014/35/EU and EMC Directive 2014/30/EU. While not certified for intrinsic safety, it is routinely deployed in Class 100–100,000 cleanrooms per ISO 14644-1 and supports audit-ready documentation for FDA-regulated environments when used within validated workflows (e.g., HVAC requalification per EU GMP Annex 1).

Software & Data Management

Data acquisition and reporting are fully file-based: measurements are stored in CSV format directly on removable USB drives. Each record includes differential pressure (Pa), calculated velocity (m/s), volumetric flow (m³/h), ambient temperature (°C), timestamp (YYYY-MM-DD HH:MM:SS), and user-defined location tag. No cloud connectivity or vendor-hosted platforms are involved—ensuring full data sovereignty and alignment with ITAR, GDPR, and HIPAA-compliant infrastructure policies. Post-acquisition analysis can be performed in Excel, Python (pandas), or MATLAB without license restrictions. Audit trail functionality is maintained via immutable file timestamps and manual logbook cross-referencing; while the device itself does not provide electronic signatures or 21 CFR Part 11 compliance, its output files are compatible with validated LIMS and ELN systems that enforce those controls.

Applications

• HVAC balancing and duct leakage verification per SMACNA and ACCA Manual D
• Cleanroom differential pressure monitoring between adjacent zones (e.g., ISO Class 7 to Class 5 corridors)
• Fume hood face velocity mapping and ASHRAE 110 tracer gas test setup
• Filter integrity testing via upstream/downstream pressure drop trending
• Lab exhaust stack flow verification and energy efficiency audits
• Pharmaceutical facility room pressurization qualification (IQ/OQ protocols)
• Academic research requiring portable, field-deployable micro-pressure metrology

FAQ

Can the Model 6850 measure static pressure independently?
No—it is a dedicated differential pressure meter and requires two ports (high and low) for operation. Static pressure measurement requires a separate reference to atmospheric pressure via a vented port.
Is calibration certificate included with shipment?
A factory calibration report (traceable to NIM) is provided; UKAS or ISO/IEC 17025-accredited calibration is available as an optional service.
Does the device support custom duct shape inputs for airflow calculation?
Yes—users can define rectangular, circular, or irregular cross-sections with up to 10 segment points for area integration.
What Pitot tube models are compatible?
Standard S-type and Prandtl-type Pitot tubes with 1/8″ NPT or quick-connect fittings are supported; KANOMAX P-102 and P-103 are recommended.
Can logged data be time-synchronized across multiple units?
No—the internal real-time clock is not GPS- or NTP-synchronized; for multi-instrument studies, external timestamp alignment is required.