MKN TES-1340 Hot-Wire Anemometer

Overview

The MKN TES-1340 Hot-Wire Anemometer is a precision handheld instrument engineered for real-time, high-fidelity measurement of air velocity in low-to-moderate turbulence environments. Utilizing constant-temperature anemometry (CTA), the device maintains a heated platinum-coated tungsten sensor at a stable temperature differential relative to ambient air—enabling rapid thermal dissipation response proportional to local airflow velocity. This principle ensures sub-second dynamic response (≤1 s), making the TES-1340 suitable for transient airflow characterization in ductwork, cleanroom monitoring, fume hood validation, and ventilation system balancing. Unlike cup or vane anemometers, the hot-wire probe delivers minimal flow disturbance and superior sensitivity at low velocities (down to 0.1 m/s), supporting compliance-driven applications where trace-level airflow verification is required.

Key Features

• Multi-unit wind speed output: selectable between m/s, ft/min, km/h, knots, and mph — configurable via front-panel interface
• Integrated volumetric airflow calculation: automatic conversion to cubic feet per minute (CFM) and cubic meters per minute (CMM) using user-defined cross-sectional area inputs
• Simultaneous environmental parameter acquisition (TES-1341 variant): concurrent measurement of ambient temperature (−20 °C to +60 °C) and relative humidity (0–100% RH) with NIST-traceable calibration reference points
• Dual-mode data capture: manual memory storage (99 readings with timestamp) and high-capacity automated logging (512 KB internal memory, equivalent to >20,000 records)
• Backlit 5-digit LCD display with real-time toggling between instantaneous, average, and peak-hold (2/3 max) wind speed modes
• USB 2.0 interface (TES-1341) enabling direct data export to Windows-based analysis platforms; includes proprietary PC software for time-series visualization, statistical reporting, and CSV export
• Configurable auto-power-off (1–60 min), battery status indicator, and ergonomic handheld form factor (235 g, 135 × 72 × 31 mm) optimized for extended field use

Sample Compatibility & Compliance

The TES-1340 is validated for use across indoor air quality (IAQ) assessment, HVAC performance verification, and occupational health & safety monitoring. Its hot-wire probe exhibits minimal aerodynamic shadowing and is compatible with standard 100 mm–300 mm duct diameters when used with traverse rods or mounting fixtures. The instrument conforms to key international standards governing airflow instrumentation, including ISO 16813:2021 (HVAC design and testing), ASHRAE Guideline 111-2020 (measurement uncertainty protocols), and OSHA Technical Manual Section III: Chapter 2 (ventilation system evaluation). While not intrinsically rated for hazardous locations, it is certified CE-marked for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU). Calibration certificates are provided with traceability to national metrology institutes (NMI) upon request.

Software & Data Management

The included Windows-compatible software (distributed on CD-ROM and via secure download) supports full audit trail functionality compliant with GLP and basic GMP documentation requirements. Logged datasets retain embedded timestamps, measurement mode flags (instant/avg/peak), and environmental context (T/RH). Export options include ANSI-standard CSV, Excel (.xlsx), and PDF report generation with customizable headers, unit annotations, and statistical summaries (min/max/mean/stdev). The software implements local file encryption and user-access logging—though full 21 CFR Part 11 compliance (e.g., electronic signatures, role-based permissions) requires integration with enterprise LIMS or validated third-party platforms.

Applications

• HVAC system commissioning and TAB (Testing, Adjusting, Balancing) per SMACNA and NEBB standards
• Cleanroom ISO Class verification (air change rate, uniformity mapping)
• Fume hood face velocity surveys aligned with ANSI/ASHRAE 110 and EN 14175
• Industrial hygiene assessments for local exhaust ventilation (LEV) effectiveness
• Academic and research airflow studies requiring portable, responsive velocity profiling
• Building envelope leakage detection support (when paired with blower door systems)

FAQ

What is the recommended recalibration interval for the TES-1340?

Annual calibration is advised under routine use; more frequent verification (e.g., pre/post critical measurements) is recommended when operating near range extremes or after mechanical shock.
Can the hot-wire probe be replaced in the field?

Yes—the sensor assembly is a user-serviceable module with standardized mounting and electrical interface; replacement probes are available as MKN P/N HW-TES1340-R.
Does the device support analog output or external triggering?

No—this model lacks analog voltage/current output or TTL trigger capability; such functionality is available only in the TES-1350 series with optional DAQ interface.
Is the USB interface compatible with macOS or Linux?

The native software is Windows-only (Windows 10/11, 64-bit); however, logged .csv files are fully interoperable across all OS platforms.
How does temperature drift affect hot-wire accuracy?

The built-in temperature compensation algorithm corrects for ambient thermal effects on sensor resistance; stated accuracy (±0.5 °C) reflects residual error after compensation across the −20 °C to +60 °C operating range.