Cleanroom Testing and Validation Instruments

Thermal Anemometer

A precision hot-wire thermal anemometer for low air-velocity measurement, temperature indication and cleanroom airflow surveys at grilles, hoods and open work zones.

Sensitive hot-wire measurement for low-speed cleanroom air.
Slim telescopic probe with minimal flow disturbance.
Averaging and logging for structured airflow traverses.

Request a Quote Browse Products

Product Introduction

This thermal anemometer uses a heated miniature sensor whose cooling response tracks local air velocity with high sensitivity at low speeds. A slim telescopic probe enters grilles, ducts and confined test locations with limited flow disturbance, while the handheld meter provides velocity, temperature, averaging and data-storage functions for systematic qualification work.

Key Features

Hot-wire sensing resolves low velocities that are difficult for conventional vane instruments.

Slim telescopic probe reaches ducts and overhead outlets with minimal flow obstruction.

Simultaneous velocity and air-temperature readings support ventilation diagnostics.

Timed and multi-point averaging stabilizes measurements in fluctuating air streams.

Selectable duct area enables calculated volumetric-flow results.

Stored readings can support traverse records and qualification documentation.

Customer Product Concerns

Low-speed unidirectional airflow requires a sensitive sensor that can enter restricted test points without materially changing the velocity being measured.

Very low cleanroom air speeds can fall below the useful sensitivity of a compact vane.A heated miniature sensor responds to small changes in convective cooling for dependable low-velocity readings.

A bulky probe can disturb the flow inside a grille or narrow duct.The slender telescopic shaft and small sensor tip reduce blockage at the measurement point.

Local turbulence makes a single instantaneous value unrepresentative.Timed and multi-point averaging produces a more stable result across the prescribed traverse.

Long qualification surveys are vulnerable to transcription errors.Onboard storage keeps point readings and statistics available for later review and reporting.

Typical Applications

Cleanroom low-velocity airflow mappingLaminar-flow hood and workstation verificationSupply grille and diffuser traversesDuct velocity and volume-flow testingVentilation commissioning and troubleshooting

Technical Parameters

Representative construction dimensions for a handheld hot-wire instrument are listed below; probe geometry, sensing range and environmental channels can be selected for the validation protocol.

Core Material	Miniature heated-film sensor, stainless telescopic probe and impact-resistant polymer handheld housing
Panel Thickness	Typically 2.0-3.0 mm for the molded meter enclosure
Effective Width	Approximately 7-12 mm across the protected probe tip
Maximum Length	Approximately 900-1100 mm with the telescopic probe fully extended
Steel Facing Thickness	Typically 0.3-0.8 mm for the stainless telescopic probe sections
Core Density	Approximately 7800-8000 kg/m³ for stainless probe components
Thermal Conductivity	Approximately 14-17 W/(m·K) for stainless probe components
Surface Finish	Dark graphite overmolded meter with satin stainless probe and black protective sensor tip
Joint Type	Locking telescopic sections with keyed detachable probe connection and protected sensing window
Customization	Available based on the intended application and operating environment.

Available Options

Straight or articulating telescopic probeVelocity and temperature probeHumidity-capable probe configurationProtective instrument caseData-download softwareTraceable calibration service

Planning a Thermal Anemometer specification?

Send us your dimensions, installation conditions, performance targets and required surface finish.

Talk to Our Team