The HHL Constant Force Cable Reel Gate Opening Sensor features an internal steel cable that is extended and directly connected to the gate being measured. When the gate is raised or lowered, the steel cable drives a measuring wheel coaxial with the encoder, causing the encoder to rotate synchronously with the gate. This converts the gate's vertical movement into the rotation of the encoder shaft, outputting corresponding position information. Its internal mechanical structure mainly consists of a constant force spring, spring wheel, measuring wheel, and wheel shaft. During descent, the gate pulls the spring to rewind, driving the mechanical mechanism to rotate. During ascent, the force generated by the rewound spring drives the mechanism to rotate and pulls the steel cable upward. This sensor boasts a rational structure, easy installation, strong anti-interference capability, high resolution, large range, long service life, and integrates detection with A/D conversion. It also features signal tracking and memory retention after power loss. It can be used for long-term detection of displacement in measured components while ensuring stable and reliable performance. It is suitable for measuring and controlling the lifting height of various gates (such as flat gates, radial gates, miter gates, gantry cranes, and bridge cranes). It is an ideal sensor for measuring and controlling displacement in rivers, lakes, reservoirs, ship locks, hydropower stations, hydrological stations, water treatment plants, and the petrochemical industry.

II. Main Technical Specifications:

1. Measuring Range: 11 meters

2. Resolution: 1 millimeter

3. Measurement System Error: ≤5mm

4. Dimensions: Length 210mm x Width 117mm x Height 220mm

5. Base Plate Dimensions: Length 270mm x Width 150mm, 4-M5x25 screws

6. Output Signal (Optional): A-4-20mA; B-Parallel Gray Code; M-RS485; S-Serial SSI Signal

7. Operating Voltage: DC12V-24V

8. Protection Rating: IP63, Sensor Rating IP65

9. Environmental Parameters: Temperature -25℃ to +80℃, Relative Humidity ≤95% (RH40℃)

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