Traffic monitoring systems require durable, high-precision components that function reliably in demanding outdoor environments. When collecting vehicle data through pneumatic road tubes, one essential component is the air-actuated switch integrated into traffic counter systems for precise signal conversion. It ensures accurate signal conversion without introducing electrical noise or interference.
To learn more about our PCB air switch solutions, visit the product page.
How Pneumatic Switches Support Traffic Data Accuracy
Traffic counters use pneumatic road tubes to detect axles as vehicles pass overhead. These axles create air pressure pulses that travel through tubing to internal electronics. The air switch for road tube traffic counters sits on the circuit board and reacts to these pulses with a clean, momentary electrical contact.
Because the switch uses air actuation, it isolates the sensing system from electrical interference. This ensures each axle pulse generates a precise signal for accurate vehicle counting, classification, or speed calculations.
Key Features of the PCB Air Switch
Presair’s compact PCB air switches are built specifically for traffic counting systems:
- Momentary Switching: Ideal for short pulse detection from road tube events
- Electrical Isolation: Prevents interference near sensitive data processing electronics
- Compact Design: Mounts directly on PCBs for space-constrained enclosures
- High Reliability: Each switch is tested to perform under repetitive cycling
- Versatile Integration: Available with wire leads for retrofit or direct PCB mounting
Application Example: Road Tube Axle Counting
In a typical highway monitoring setup:
- Vehicle Contact: A tire compresses the road tube, generating a burst of air.
- Pulse Transfer: Air travels through tubing to the traffic counter housing.
- Switch Activation: The air pulse actuates the PCB air switch, closing the circuit momentarily.
- Signal Processing: Internal electronics count each pulse to measure traffic flow and speed.
The air switch for road tube traffic counters delivers fast and noise-free electrical responses—perfect for axle detection where precision and timing are critical.
Broader Use in Transportation Electronics
Besides axle counters, these compact air switches fit into other transport tech where electrical isolation and clean switching are essential:
- Portable data loggers
- Toll booth vehicle detection systems
- ITS traffic analysis platforms
- Speed and axle-gap analyzers
Why Engineers Choose Presair
Presair’s PCB-mounted switches offer:
- Proven stability in high-cycle applications
- UL/cUL recognition and U.S.-based manufacturing
- Compatibility with custom air sensing designs
- Safe, air-isolated operation for modern electronics
Built for Reliability in Harsh Conditions
From freezing winters to hot summer highways, Presair air switches withstand temperature shifts, humidity, and repeated cycling. Designed and tested in Eau Claire, WI, these switches perform where others fail.
To request OEM pricing, please contact us.
