CET8311 Piezo Traffic Sensor
The CET8311 Piezo Traffic Sensor is an advanced sensor leveraging the piezoelectric effect to
generate electrical signals by detecting pressure changes from
vehicles. It enables precise monitoring of axle count, vehicle
speed, classification, and dynamic weighing. With features such as
high sensitivity, durability, cost-effectiveness, and easy
installation, it is widely used in highway and urban traffic
management, providing critical data support for intelligent
transportation systems.
Working Principle
The sensor uses the longitudinal piezoelectric effect of polymer
materials to generate an electric charge when impacted. It converts
the vehicle tire’s weight into proportional electrical signals,
enabling the detection of wheel load, axle load, and total vehicle
weight.
Two types for CET8311 Piezo Traffic Sensor:
•Class I (Weigh In Motion, WIM): Used for dynamic weighing
applications, with an output consistency of ±7%, suitable for
applications requiring high-precision weight data.
•Class II (Classification): Used for vehicle counting,
classification, and speed detection, with an output consistency of
±20%. It is more economical and suitable for high-traffic
management applications.
The Main Parameters of CET8311 Piezo Traffic Sensor
Output Uniformity | ±20% for Class II (Classification) ±7% for Class I (Weigh in Motion) |
Operating Temperature Range | -40℃～85℃ |
Temperature Sensitivity | 0.2%/℃ |
Typical Output Level | At 25ºC, using 250mm*6.3mm rubber head, pressing 500KG force, peak
output 11-13V |
Piezoelectric Coefficient | 22 pC/N |
Center Core | 16 gauge, flat, braided, silver plated copper wire |
Piezoelectric Material | Spiral-wrapped PVDF Piezoelectric film |
Outer Sheath | 0.4mm thick brass |
Passive Signal Cable | RG58A/U, using high-density polyethylene sheath, can be directly
buried; outer diameter 4mm, rated capacitance 132pF/m |
Product Life | >40 to 100 million axle times |
Capacitance | 3.3m,40m cable,18.5nF |
Insulation Resistance | DC 500V >2,000MΩ |
Packaging | 2 or 4 pcs per box (540×540×145mm paper box) |
Installation Brackets | Includes brackets. One bracket per 150mm |
Sensor Dimensions | 1.6mm*6.3mm, ±1.5% |
Installation Slot Size | 20mm×25mm |
