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Systèmes de contrôle des salles blanches et de surveillance environnementale
Capteur de flux d'air
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
Introduction de produit
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.
Préoccupations du client produit
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.
Les applications typiques
AHU supply airflow measurementCleanroom main-duct monitoringReturn-air volume trackingExhaust airflow control
Paramètres techniques
Typical construction for a cleanroom duct averaging airflow sensor is listed below.
| Matériaux de base | 6063 anodized aluminum sensing tubes with galvanized steel or stainless mounting frame |
|---|---|
| Panneau épaisseur | 25-60 mm sensing-tube depth |
| Largeur effective | 200-1500 mm duct span |
| Longueur maximale | Up to 1800 mm sensing-grid length |
| Acier face épaisseur | 1.2-1.6 mm galvanized or stainless mounting frame |
| Densité Core | 2650-2750 kg/m³ for aluminum sensing elements |
| Conductivité thermique | 150-220 W/(m·K) for aluminum sensing tubes |
| surface finie | Natural anodized aluminum tubes with clean zinc-coated or satin stainless frame |
| Type joint | Duct flange or insertion brackets with separated total-static pressure connectors |
| Customisation | Disponible en fonction de l'application prévue et de l'environnement d'exploitation. |
Options disponibles
Cross-grid or single-span probeAluminum or stainless constructionCircular or rectangular duct fitBarbed or compression fittings
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