VelociCalc® Multi-Function Air Velocity Meter 9565-X

Overview

The VelociCalc® Multi-Function Air Velocity Meter 9565-X is a handheld, field-deployable instrument engineered for precision measurement of air velocity, temperature, humidity, and auxiliary environmental parameters in HVAC, cleanroom, laboratory safety, and indoor air quality (IAQ) applications. It operates on the principle of thermal anemometry for air velocity sensing—employing constant-temperature anemometer (CTA) technology to deliver high reproducibility across turbulent and laminar flow regimes. The device integrates dual K-type thermocouple inputs, optional plug-and-play Smart Probes (including VOC, CO₂, and vane anemometer variants), and real-time multi-parameter display capability. Designed for compliance with ASHRAE Standard 111, ISO 16813, and ANSI/ASHRAE Guideline 12–2020 for infectious aerosol control, the 9565-X supports traceable calibration protocols and meets requirements for GLP-compliant field verification in regulated environments.

Key Features

• Intuitive, language-localized, direct-read menu interface with step-by-step on-screen guidance for setup, operation, and field calibration
• Large backlit LCD display showing up to five simultaneous parameters (e.g., air velocity, dry-bulb temperature, wet-bulb temperature, relative humidity, and calculated dew point)
• Dual K-type thermocouple inputs enabling differential temperature or surface temperature monitoring alongside airflow
• Modular Smart Probe architecture supporting hot-wire, vane, CO₂, and photoionization detector (PID)-based VOC probes—each with embedded calibration coefficients and auto-identification
• On-device data logging with configurable sampling intervals (1 sec to 1 hr), memory capacity supporting ≥10,000 records
• Wireless Bluetooth 4.2 (BLE) connectivity for real-time telemetry, remote configuration, and over-the-air firmware updates
• USB-C interface for high-speed data export and power charging; compatible with TrakPro™ Lite and LogDat2™ desktop software for post-processing, report generation, and audit-trail-enabled data review

Sample Compatibility & Compliance

The 9565-X accommodates diverse sampling configurations—from duct traverse measurements using retractable probe extensions to point-of-use assessments at fume hood sashes, biosafety cabinet work surfaces, and cleanroom diffusers. Its thermal anemometer probe is rated for operation in non-corrosive, non-explosive airstreams with particulate loading ≤10 mg/m³. The instrument conforms to IEC 61000-4-2 (ESD immunity), IEC 61000-4-3 (radiated RF immunity), and meets CE marking requirements under the EU Electromagnetic Compatibility Directive 2014/30/EU. For regulated facilities, it supports 21 CFR Part 11–compliant electronic records when used with TrakPro™ software configured for audit trail, user authentication, and electronic signature enforcement.

Software & Data Management

Data acquisition and analysis are facilitated through two complementary platforms: TrakPro™ Lite (Windows-based) enables graphical trend analysis, customizable reporting (PDF/CSV/XLSX), and validation-ready documentation including calibration history, operator ID, and timestamped metadata. LogDat2™ provides cloud-synchronized logging for multi-instrument fleet management and automated alerting based on user-defined thresholds. All exported datasets include embedded instrument ID, probe serial numbers, calibration expiration dates, and environmental context tags—ensuring full traceability per ISO/IEC 17025:2017 Clause 7.7 requirements.

Applications

• HVAC system commissioning, balancing, and TAB (Testing, Adjusting, Balancing) per NEBB and AABC standards
• Biosafety cabinet (BSC) and fume hood face velocity verification per NSF/ANSI 49 and EN 14175
• Cleanroom airflow uniformity and recovery testing per ISO 14644-3
• Thermal comfort evaluation using PMV/PPD indices derived from concurrent velocity, temperature, and humidity readings
• Indoor air quality (IAQ) surveys incorporating CO₂ demand-controlled ventilation assessment and VOC screening
• Exhaust stack and local exhaust ventilation (LEV) system performance audits

FAQ

What calibration standards does the 9565-X support?
It accepts NIST-traceable calibration certificates for velocity and temperature sensors; factory calibration includes uncertainty budgets per ISO/IEC 17025 guidelines.
Can the instrument store calibration offsets for multiple Smart Probes?
Yes—each Smart Probe retains its unique calibration curve and offset values in onboard EEPROM; the meter auto-loads correction factors upon connection.
Is Bluetooth communication encrypted?
Data transmission uses AES-128 encryption; pairing requires manual confirmation on both device and host to prevent unauthorized access.
Does the USB interface support mass storage mode?
No—USB-C operates exclusively in device mode for firmware updates and data transfer via vendor-specific drivers; no direct file system access is exposed.
How is traceability maintained during field recalibration?
Field calibration events are logged with GPS coordinates (if enabled), operator ID, reference standard ID, and pass/fail status—all retained in the internal audit log and exportable with raw data.