KANOMAX Model 6850 Handheld Micro Differential Pressure Meter

Overview

The KANOMAX Model 6850 Handheld Micro Differential Pressure Meter is a precision-engineered instrument designed for reliable, on-site measurement of low-differential pressure in HVAC commissioning, cleanroom validation, fume hood performance testing, and building envelope diagnostics. It operates on the principle of piezoresistive pressure transduction, delivering high-stability readings across its full −2500 to +2500 Pa range. When paired with a calibrated pitot tube or averaging probe, the device computes air velocity (0.20–60.0 m/s) and volumetric airflow (up to 999,999 m³/h) using real-time Bernoulli-based algorithms compliant with ISO 16813 and ASHRAE Guideline 12. Its compact, ergonomic form factor—weighing only ≈360 g with batteries—and integrated color LCD ensure legibility under varied ambient lighting conditions during field deployment.

Key Features

• Piezoresistive differential pressure sensor with thermal compensation for minimal drift over temperature (0–60 °C operating range)
• True-color backlit display showing simultaneous differential pressure, air velocity, and volumetric flow rate
• High-resolution data acquisition: 0.1 Pa pressure resolution; 0.01 m/s velocity resolution
• On-device statistical analysis: real-time calculation and display of max/min/average values across stored datasets
• Internal memory capacity of 10,000 measurement records with timestamp, channel ID, and environmental metadata
• Direct USB mass-storage-mode export: no proprietary software required—data exports as CSV files readable in Excel, MATLAB, or LIMS platforms
• Dual power configuration: 4× AA alkaline batteries (≥15 h continuous operation) or optional 5 V DC AC adapter for extended bench use

Sample Compatibility & Compliance

The Model 6850 interfaces seamlessly with industry-standard pitot tubes (e.g., KANOMAX 6701 series), static pressure probes, and multi-point averaging arrays. Its pressure port design accommodates both 1/8″ NPT and quick-connect tubing interfaces. All measurements adhere to traceable calibration protocols aligned with ISO/IEC 17025-accredited reference standards. The device supports documentation workflows compliant with ISO 14644-3 (cleanroom certification), FDA 21 CFR Part 11 (when used with validated USB export procedures), and EU GMP Annex 1 (airflow uniformity and pressure cascade verification). No firmware-based audit trail is embedded; however, exported CSV files retain full timestamping and operator-assigned session identifiers for GLP/GMP traceability.

Software & Data Management

Data management is intentionally streamlined: the unit functions as a USB mass storage device—no driver installation or vendor-specific software is required. Upon connection to a Windows/macOS/Linux host, the internal memory appears as a removable drive. Measurement logs are stored in plain-text CSV format with columns for date/time, differential pressure (Pa), velocity (m/s), volumetric flow (m³/h), and user-defined notes. Each record includes UTC-synchronized timestamps generated by the onboard real-time clock. For integration into enterprise QA systems, the CSV output is compatible with common data ingestion pipelines (e.g., LabVantage, TrackWise, or custom Python/Pandas preprocessing scripts). Firmware updates are delivered via downloadable .bin files and applied through the same USB interface.

Applications

• HVAC system balancing and duct leakage verification per SMACNA and ASHRAE Standard 111
• Cleanroom pressure cascade mapping and ISO Class compliance verification (ISO 14644-1)
• Fume hood face velocity and inflow assessment per ANSI/ASHRAE 110 and EN 14175
• Filter integrity testing support via upstream/downstream pressure drop monitoring
• Building envelope infiltration/exfiltration quantification using blower door auxiliary mode
• Pharmaceutical facility room pressurization audits under EU GMP Annex 1 Section 4.22

FAQ

What pressure sensors are supported for external connection?
The Model 6850 accepts standard 1/8″ NPT male fittings and includes a dual-port manifold for simultaneous high- and low-pressure line connection. It is compatible with KANOMAX pitot tubes (6701 series), static pressure probes (6711), and third-party probes meeting IEC 61298-2 linearity and overpressure specifications.
Is the device suitable for Class A cleanroom certification?
Yes—when operated with an ISO/IEC 17025-calibrated pitot tube and following documented SOPs, the Model 6850 meets the accuracy and repeatability requirements for differential pressure and airflow verification in ISO Class 5–8 environments per ISO 14644-3 Annex B.
Can measurement data be password-protected or encrypted?
No—the USB export function provides unencrypted CSV files for interoperability. Encryption or access control must be implemented at the host system level (e.g., via BitLocker or macOS FileVault) prior to archiving.
Does the unit support analog output or Modbus communication?
No—the Model 6850 is a standalone handheld instrument without analog voltage/current outputs or industrial fieldbus interfaces. Data transfer is exclusively via USB mass storage.
How often does the internal sensor require recalibration?
KANOMAX recommends annual recalibration against NIST-traceable standards. Field zeroing is supported via the front-panel “Zero” function under stable ambient conditions, but this does not replace formal calibration.