1. Product Overview
The INK452 Tunnel Wind Speed and Direction Detector is a specialized monitoring device designed for real-time airflow measurement in road tunnels. Using the ultrasonic time-difference method, it provides accurate wind speed and direction data to tunnel control rooms, supporting ventilation management and safe operations. Installed on tunnel sidewalls, the sensor captures representative airflow across the traffic lane, transmitting data to local PLC substations and main control rooms via optical transceivers and fiber optics. Its non-contact, IP65-rated design ensures reliable, low-maintenance performance in harsh tunnel environments.
2. Sensing Technology & Self-Cleaning System
Sensing Technology:
The core principle is the ultrasonic time-difference method. Two ultrasonic transducers send and receive acoustic pulses along fixed paths. The difference in pulse travel time between opposing directions is used to calculate wind speed, while signal analysis determines direction. This technology is unaffected by ambient temperature changes, ensuring stable measurements even in variable tunnel conditions.
Self-Cleaning & Maintenance Design:
The detector features a non-contact, no moving parts design, eliminating mechanical wear and reducing failure rates. While no explicit self-cleaning mechanism is mentioned, its IP65-rated enclosure protects against dust, moisture, and debris, minimizing the need for routine maintenance. The solid-state construction ensures long-term reliability in tunnel environments.
3. Key Features & Competitive Advantages
- Ultrasonic Time-Difference Principle: Unaffected by ambient temperature, delivering stable, accurate wind measurements.
- Non-Contact, No Moving Parts: Eliminates mechanical wear, reduces failure rates, and lowers maintenance costs.
- Full Lane Sampling Coverage: Captures airflow across the entire traffic lane, providing true representation of tunnel conditions.
- IP65 Environmental Protection: Resists dust, moisture, and harsh conditions in tunnels.
- Wide Measurement Range: Covers -60 m/s to 60 m/s, suitable for both normal and emergency airflow scenarios.
- Multiple Communication Interfaces: Supports RS485/RS232 with Modbus RTU for flexible integration with control systems.
- Flexible Power Supply: Operates on AC 220 V or DC 12 V, compatible with standard tunnel infrastructure.
- Compact, Lightweight Design: Easy to install on tunnel sidewalls with minimal space requirements.
4. Technical Specifications
| Parameter |
Specifications |
| Measurement Principle |
Ultrasonic time-difference method |
| Measurement Range |
-60 m/s ~ 60 m/s |
| Measurement Accuracy |
±(0.3 + 0.03V) m/s (V = measured wind speed) |
| Resolution |
±0.1 m/s |
| Digital Interface |
RS485 or RS232 |
| Communication Protocol |
Modbus RTU |
| Protection Class |
IP65 |
| Power Supply |
AC 220 V ±10 %, 50/60 Hz / DC 12 V |
| Dimensions (W×H) |
140 × 230 mm |
| Weight |
Approx. 0.8 kg |
| Installation |
Tunnel sidewall, oriented in the direction of traffic flow |
5. Applications
- Road tunnel ventilation control systems
- Highway tunnel environmental monitoring
- Railway tunnel airflow and safety management
- Urban underground transportation infrastructure
- Industrial tunnel and mining ventilation monitoring
- Tunnel fire safety and smoke control systems
- Smart city traffic and tunnel management platforms
- Integration with SCADA and building automation systems
