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Cleanroom Control and Environmental Monitoring Systems
Airflow Sensor
A multi-point averaging sensor that samples total and static pressure across a duct and produces a stable differential signal for air-volume calculation.
- Multi-Point Duct Averaging
- Total and Static Pressure
- Low Permanent Pressure Loss
- External Tubing Ports
Product Introduction
The duct airflow sensor uses perforated aluminum or stainless sensing tubes positioned across the duct cross-section. Upstream ports collect total pressure and separate ports collect static pressure; each set is internally averaged before reaching the external connectors. The resulting differential pressure represents mean duct velocity more reliably than a single-point pickup. Connected to a differential transmitter or controller, the sensor supports continuous volume-flow indication, alarm or closed-loop regulation without an active electronic element in the duct.
Key Features
Separate total and static chambers provide a continuous differential pressure signal.
Passive probe construction needs no power or electronics inside the airstream.
External barbed or compression fittings simplify connection to a remote transmitter.
Customer Product Concerns
Single-point velocity readings often misrepresent total duct airflow when profiles are uneven after elbows, dampers or transitions.
A central pitot point misses high and low velocity regions across the duct.Distributed ports average the profile across multiple locations.
Electronics in the duct are difficult to service and expose wiring to airflow.The passive sensing grid sends only pneumatic signals to an external transmitter.
Tubing connections are inaccessible after ceiling closure.External manifolds place total and static fittings at a serviceable duct location.
Incorrect duct dimensions produce an inaccurate volume-flow value.The controller uses the actual duct area and measured differential to calculate airflow.
Typical Applications
AHU supply airflow measurementCleanroom main-duct monitoringReturn-air volume trackingExhaust airflow control
Technical Parameters
Typical construction for a cleanroom duct averaging airflow sensor is listed below.
| Core Material | 6063 anodized aluminum sensing tubes with galvanized steel or stainless mounting frame |
|---|---|
| Panel Thickness | 25-60 mm sensing-tube depth |
| Effective Width | 200-1500 mm duct span |
| Maximum Length | Up to 1800 mm sensing-grid length |
| Steel Facing Thickness | 1.2-1.6 mm galvanized or stainless mounting frame |
| Core Density | 2650-2750 kg/m³ for aluminum sensing elements |
| Thermal Conductivity | 150-220 W/(m·K) for aluminum sensing tubes |
| Surface Finish | Natural anodized aluminum tubes with clean zinc-coated or satin stainless frame |
| Joint Type | Duct flange or insertion brackets with separated total-static pressure connectors |
| Customization | Available based on the intended application and operating environment. |
Available Options
Cross-grid or single-span probeAluminum or stainless constructionCircular or rectangular duct fitBarbed or compression fittings
Planning a Airflow Sensor specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
