Rotameter available with switches and 4-20 ma output.
Product Overview
Air flow switches are essential devices for monitoring airflow in ventilation ducts, air handling units, compressors, and burner systems. A mechanical paddle senses air movement and actuates a microswitch when flow drops below the adjustable threshold. This provides reliable confirmation of airflow for safety interlocks, fan proving, over‑temperature prevention, and system protection. Models feature field‑trimmed paddles, wide setpoint adjustability, SPDT/DPDT contacts, and rugged housings for industrial environments. Suitable for air and clean gases, air flow switches are widely used in HVAC, boiler combustion control, dust collection systems, and general industrial ventilation. They offer simple installation, dependable operation, and low maintenance.
Air Flow Switch
| Feature | Specification |
|---|---|
| Product Type | Paddle / vane‑type air flow switch |
| Measured Media | Air and non‑corrosive gases |
| Switching Principle | Mechanical vane deflection activates microswitch |
| Setpoint Range | Typically adjustable from 1–20 m/s (200–4000 FPM), model dependent |
| Electrical Rating | SPDT or DPDT contacts, typically 5–15A @ 250 VAC |
| Duct Size Compatibility | Fits ducts from 4″ up to large industrial ventilation systems |
| Temperature Range | –20°C to +80°C typical (higher available) |
| Pressure Range | Suitable for low‑pressure air systems; <2 bar |
| Installation | Horizontal or vertical ducts, field‑trimmable paddle |
| Outputs | Dry contact alarm or interlock signal |
| Applications | HVAC fans, air handlers, boilers, dust collectors, compressors, ventilation safety system |
