KANOMAX 6850+ Digital Micro Differential Pressure Meter
| Brand | KANOMAX |
|---|---|
| Origin | Liaoning, China |
| Model | 6850+ |
| Pressure Range | −2500 to +2500 Pa |
| Accuracy | ±0.5% of reading ±1 Pa |
| Resolution | 0.1 Pa |
| Velocity Range | 0.20–60.0 m/s |
| Velocity Accuracy | ±1.5% of reading (at 10.0 m/s) |
| Velocity Resolution | 0.01 m/s |
| Flow Rate Range | 0–999999 m³/h |
| Flow Resolution | 1 m³/h |
| Operating Temperature | 0–60 °C (non-condensing) |
| Storage Temperature | −20–70 °C (non-condensing) |
| Power | 4 × AA batteries or DC 5 V adapter |
| Battery Life | >15 h |
| Weight (with batteries) | ≈360 g |
| Data Storage Capacity | 10,000 records |
| Interface | USB for direct data export to USB flash drive |
Overview
The KANOMAX 6850+ Digital Micro Differential Pressure Meter is a precision-engineered instrument designed for high-accuracy differential pressure measurement in HVAC system commissioning, fan performance testing, cleanroom validation, and ventilation efficiency audits. Based on piezoresistive silicon sensor technology with temperature compensation, the 6850+ delivers stable, low-drift readings across its full −2500 to +2500 Pa range. Its core functionality integrates seamlessly with Pitot tubes or averaging probes to derive volumetric airflow rates—enabling real-time calculation of velocity (0.20–60.0 m/s) and volumetric flow (0–999999 m³/h) directly from differential pressure inputs. The device operates under ISO 5801-compliant fan test conditions and supports traceable calibration per ISO/IEC 17025-accredited procedures. Designed for field-deployable reliability, it meets IEC 61000-4 electromagnetic compatibility standards and carries IP42 ingress protection for controlled indoor environments.
Key Features
- True-color TFT LCD display showing simultaneous differential pressure, air velocity, and volumetric flow rate with intuitive unit switching (Pa, mmH₂O, inH₂O, m/s, ft/min, m³/h, CFM)
- Onboard data logging capacity for up to 10,000 measurement records with time/date stamping, accessible via USB interface for direct export to USB flash drives without proprietary software
- Real-time statistical analysis including min/max/average calculation, selectable per session or across entire memory bank
- Automatic zeroing function with drift compensation; user-accessible offset adjustment for sensor baseline correction
- Dual power options: long-life alkaline AA battery operation (>15 hours continuous use) or regulated DC 5 V input via optional AC adapter
- Robust ABS housing with ergonomic grip and integrated probe holder; weight optimized at 360 g (including batteries) for handheld portability during duct traverse surveys
Sample Compatibility & Compliance
The KANOMAX 6850+ is validated for use with dry, non-corrosive, particle-free gases—including ambient air, nitrogen, and compressed air—within specified operating limits. It is not rated for use with liquids, vapors, or aggressive media such as chlorine, ammonia, or solvent-laden airstreams. The instrument complies with CE marking requirements under the EU Measuring Instruments Directive (MID) Annex MI-004 for differential pressure meters used in energy-related applications. While not intrinsically safe, it is suitable for Zone 2/Class I Division 2 environments when operated outside hazardous area boundaries. Calibration certificates conform to ISO 17025 guidelines and support audit readiness for ASHRAE Standard 111, ISO 16813, and EN 12599 ventilation system testing protocols.
Software & Data Management
No dedicated PC software is required for basic operation or data retrieval. All logged data are stored in plain-text CSV format, ensuring immediate compatibility with Excel, MATLAB, LabVIEW, or LIMS platforms. Each record includes timestamp (YYYY-MM-DD HH:MM:SS), differential pressure (Pa), derived velocity (m/s), calculated flow (m³/h), and status flags (e.g., “Zeroed”, “Overrange”). Audit trail integrity is maintained through immutable timestamps and sequential record indexing. For regulated environments, users may implement external electronic record controls aligned with FDA 21 CFR Part 11 requirements—including user authentication, electronic signatures, and change history tracking—using their institutional data management infrastructure.
Applications
- Fan performance characterization per ISO 5801 and AMCA 210, including total pressure rise, static efficiency, and system resistance curve generation
- Filter integrity testing and HEPA/ULPA filter bank monitoring via upstream/downstream ΔP trending
- Room pressurization verification in pharmaceutical cleanrooms (ISO 14644-3), isolation rooms, and biosafety cabinets
- Duct traverse surveys using multi-point Pitot tube arrays to determine average face velocity and volumetric flow distribution
- Commissioning and periodic re-validation of HVAC systems under ASHRAE Guideline 0 and ISO 16813
- Energy audit support for ASHRAE Level I–III assessments and LEED EA credit documentation
FAQ
What is the recommended recalibration interval for the KANOMAX 6850+?
KANOMAX recommends annual calibration against NIST-traceable standards. Field zeroing before each test session is advised to mitigate thermal drift and mechanical hysteresis.
Can the 6850+ measure negative gauge pressure (vacuum)?
Yes—it measures true differential pressure across its full symmetric range of −2500 to +2500 Pa, enabling both suction-side and discharge-side fan measurements without mode switching.
Is the device compatible with third-party Pitot tubes?
Yes, provided the tube’s calibration coefficient (Cp) is entered manually; the meter applies standard ISO 10780 and ASHRAE Fundamentals-derived algorithms for velocity derivation.
Does the 6850+ support analog output or Modbus communication?
No—this model features USB mass-storage class only. For industrial integration, consider the KANOMAX 6843 series with 4–20 mA output and RS-485 Modbus RTU capability.
How is data integrity ensured during USB export?
Files are written in FAT32-compliant format with CRC-16 checksum validation; no file corruption has been observed in >10⁶ export cycles across laboratory and field deployments.
