Kanomax KA33 Thermal Anemometer

Overview

The Kanomax KA33 Thermal Anemometer is a precision-engineered handheld instrument designed for reliable, repeatable air velocity measurements in demanding industrial, HVAC, cleanroom, and research environments. Based on constant-temperature anemometry (CTA) principle, the KA33 employs a thermally sensitive probe element whose heat dissipation correlates directly with local airflow velocity. This method ensures high sensitivity at low velocities (down to 0.01 m/s) while maintaining linearity and stability across its full 0.01–50.0 m/s range. Unlike cup or vane anemometers, the thermal sensing architecture eliminates mechanical inertia and directional dependence, enabling accurate readings in turbulent, low-flow, or confined spaces—such as ducts, fume hoods, laminar flow cabinets, and ventilation grilles. The KA33 is the direct successor to the widely deployed KA22/KA31 series, incorporating refinements in sensor calibration traceability, thermal drift compensation, and environmental robustness without compromising field serviceability.

Key Features

• Simultaneous real-time measurement of air velocity, ambient temperature, and differential pressure—enabling comprehensive airflow characterization in a single acquisition cycle.
• Dual-mode display: 3.5-inch true-color LCD supports both numeric digital readouts and dynamic analog bar-graph visualization for rapid trend assessment and operator feedback.
• Three-level adjustable backlighting optimized for visibility in low-light (e.g., ceiling plenums) or high-glare (e.g., outdoor rooftop units) conditions.
• Intelligent judgment mode: User-definable upper/lower velocity thresholds trigger visual and audible alerts when measured values exceed specified operational limits—supporting ISO 14644-3, ASHRAE 110, or internal QA/QC protocols.
• Statistical data logging: On-device calculation and display of maximum, minimum, and time-weighted average velocity over user-specified intervals—essential for ISO 14644-1 classification audits and HVAC balancing reports.
• Modular probe system: Fully interchangeable, ruggedized thermal probes with integrated telescoping shafts (up to 1.2 m extended length) and 180° articulation—facilitating access to overhead ducts, filter banks, and narrow apertures without disassembly.
• Enhanced energy efficiency: Redesigned power management extends battery life by 25% versus prior-generation models under identical duty cycles, while operating on standard 4×AA cells (6 V DC).

Sample Compatibility & Compliance

The KA33 is compatible with a range of Kanomax-certified thermal probes—including straight, bent-tip, and retractable variants—each calibrated individually and traceable to JIS Z 8000 and NIST-traceable standards. Its operating envelope (−20 to +100 °C ambient; 2–98% RH non-condensing) supports deployment in steam tunnels, drying ovens, refrigerated chambers, and outdoor weather stations. The instrument meets IEC 61000-4 electromagnetic compatibility requirements and carries PSE certification for use in Japan. While not intrinsically safe, it is suitable for non-hazardous area applications compliant with ANSI/ASHRAE Standard 111 and ISO 5801 for fan performance testing. Calibration certificates include uncertainty budgets per ISO/IEC 17025 guidelines.

Software & Data Management

Data export is supported via USB interface to Kanomax’s proprietary KAN-LOG software (Windows-compatible), enabling time-stamped CSV export, graphical trend analysis, report generation (PDF/Excel), and batch calibration certificate management. The device stores up to 10,000 measurement records internally with timestamp, probe ID, and environmental metadata. Audit trail functionality—including operator ID tagging and parameter change logs—is configurable to support GLP/GMP workflows. Firmware updates are delivered via signed binary packages, ensuring integrity verification prior to installation.

Applications

• HVAC system commissioning and TAB (Testing, Adjusting, Balancing) per ASHRAE Guideline 1 and SMACNA standards.
• Cleanroom air change rate validation and ISO 14644-1 particle count correlation studies.
• Industrial exhaust hood face velocity surveys for OSHA 1910.145 and ANSI Z9.5 compliance.
• Energy audit assessments of fan efficiency, duct leakage, and coil bypass airflow.
• R&D airflow profiling in wind tunnel mock-ups, electronics cooling simulations, and textile drying process optimization.
• Academic laboratory instruction in fluid mechanics, thermodynamics, and environmental engineering curricula.

FAQ

Is the KA33 suitable for cleanroom ISO Class 5 (Class 100) certification?
Yes—the KA33’s resolution of 0.01 m/s below 10 m/s and ±2% FS accuracy meet the velocity uniformity and repeatability requirements outlined in ISO 14644-3 Annex B for unidirectional airflow systems.
Can probe calibration be performed in-house?
No—probe calibration requires controlled wind tunnel facilities and NIST-traceable reference standards. Kanomax recommends annual recalibration at authorized service centers with full ISO/IEC 17025-compliant documentation.
Does the KA33 support data logging at user-defined intervals?
Yes—internal logging intervals are programmable from 1 second to 60 minutes, with automatic start/stop triggers based on velocity thresholds or timer events.
What is the warranty coverage for the KA33?
Kanomax provides a 24-month limited warranty covering material and workmanship defects, excluding consumables (e.g., probe tips) and damage from misuse, unauthorized modification, or exposure beyond specified environmental limits.
Is the device compatible with third-party data acquisition platforms?
The KA33 does not support Modbus, BACnet, or other industrial protocols natively; however, KAN-LOG software includes COM port emulation and API-ready CSV output for integration into LabVIEW, Python, or custom SCADA systems via post-processing.