ERICCO INERTIAL TECHNOLOGY ER-GyroTracker-21 Dual System (Gyro+Fluxgate) Trajectory Surveying Device for Mining Introduction The ER-GyroTracker-21 is an intelligent real-time borehole trajectory surveying device, consisting of a surveying probe（hereinafter referred to as "probe"）and a mining smartphone as its core system . The probe has a diameter of only 24.75mm and is equipped with high-precision MEMS gyro directional module and fluxgate directional module, supporting dual modes of true north and magnetic north output. The probe is installed inside the drill pipe, which reduces the operational failure rate of the equipment. During the measuring while drilling process, the stability of data collection and transmission has significantly improved. It can also achieve real-time measurement of the drilling space trajectory and depth while drilling, without the need for any manual intervention throughout the process. This completely eliminates the problems of false drilling and empty drilling from the very beginning. Via Bluetooth, the probe communicates with the mining smartphone to record borehole attributes at the start of drilling. After drilling, data stored in the probe is transmitted to the smartphone for instant display of trajectory and depth. Depth can be measured automatically by the probe’s built-in sensor or synchronized with the drill rig via the smartphone—eliminating manual intervention and preventing false drilling records. Key Advantages 1. Two-in-One Gyro+Fluxgate system, can output both true north and magnetic north： A) When there is magnetic field interference, it can directly switch to the Gyro Mode without picking up the drill, saving a lot of costs and time, improving efficiency and having stronger adaptability. B) In high-precision measurement, the Gyro+Fluxgate system can serve as backups and references for each other, improving measurement accuracy and reducing errors, and minimizing the losses caused by errors. 2. Employing MEMS strapdown inertial navigation system: Free from magnetic field influence, ensuring the stability and accuracy of trajectory measurement in complex underground environments. 3. Ultra-small diameter 24.75mm, highly adaptable: It can be compatible with more small-diameter drilling tools and can complete the detection work in more complex drilling environments. 4. Wireless data transmission. 5. Compatible with real-time measurement / post-drilling measurement. 6. Automatic measurement of drilling depth. 7. User-friendly analysis software with multi-borehole management and one-click Word report generation. Whatsapp/Wechat/Mob:8613992884879 Websit : www.ericcointernational.com E-mail : ericco001@ericcointernatio

ERICCO INERTIAL TECHNOLOGY • Real -time borehole trajectory measurement during drilling in coal mines • Azimuth measurement for directional and straight-hole drilling • Detection of deviation accuracy in directional drilling • Borehole depth measurement Whatsapp/Wechat/Mob:8613992884879 Websit: www.ericcointernational.com E-mail: [email protected]

ERICCO INERTIAL TECHNOLOGY Mining-specific mobile phone Explosion-proof mark Technical Features • Real-time trajectory & depth measurement: Built-in high-precision angle and depth sensors ensure accurate spatial tracking and automatic depth recording. • On -site results viewing: Immediately display measurements on the mining smartphone, including data tables, trajectory curves, and quality evaluation. • Compatible with multiple drill pipes: Supports ®42mm/®50mm/®63.5mm/®73mm diameters. • Flexible operation: Suitable for in-drill measurement or post-drill handheld verification. • Bluetooth data...