Primarily designed for flatness measurement and recording during rail weld joint construction, maintenance, and monitoring, it is widely applicable to various units involved in the construction and maintenance of seamless rail transit infrastructure, such as railway bureau group engineering departments, rail welding bases, construction engineering companies, subway construction and maintenance parties, and scientific research institutes.

Equipment Components: 1 Charging Indicator Light: Lights up when the main power is plugged in (red during charging, green when charging is complete)
2. Operation Indicator Light: Displays the device's operating status (red light slow flash when device is not connected, green light fast flash when WiFi connection is successful, blue light fast flash when Bluetooth connection is successful, red light fast flash during testing)
3. Carrying Handle: Handle for short-distance on-site movement of the device
4. Left and Right Insulation Components: Built-in communication antenna and magnetic suction components, top button controls the bottom magnet to adhere to the measured surface device casing cover
5. Device Power Switch (automatically shuts off after 10 minutes in unconnected state)
6. Device Nameplate, WiFi Antenna, Bluetooth Antenna
7. Left and Right Positioning Brackets: Curved edge facing down for running surface measurement state, long straight edge facing down for guiding surface measurement state (can only rotate in one direction) Left and Right Reference Contact Blocks: The measurement reference points of the entire electronic ruler (placed on a flat area and in good contact with the measured rail)
8. Power Module, 14 Lithium Battery Pack
9. Measurement and Main Control Circuit
10. Sensor Detection Surface: 100 capacitive sensors arranged from left to right (protect this surface from external impact) 19 DC Charging Port 20 Device Model

Specifications:
Measurement Length 1m Battery Capacity 4x3.7v LI-ION/12800mAh
Horizontal Resolution 100 points (1 point/cm) Bluetooth Standby Time 150 hours (>5000 measurements)
Vertical Resolution 0.003mm WiFi Standby Time 80 hours (>3000 measurements)
Measurement Accuracy ±0.01mm Protection Rating IP65
Measurement Stability rms 0.01mm Operating Environment Temperature -20℃~+50℃
Linearity Error ± 0.2% Rail Operating Temperature -40℃~+80℃
Measurement Range -2.5mm~+2.5mm Humidity Requirement <90%
Single Measurement Time <6s Charging Interface DC
Device Net Weight 5KG Communication Interface
Main Body Dimensions 1200mmx57.5mmx50mm Positioning Module GPS/BeiDou