CMC LineScale 3i Load Cell

When accuracy matters, choose the all-in-one load cell that is strong, smart, and ultra fast.

The CMC LineScale 3i is a high-strength, high-speed load cell designed for the demands of rope rescue, rope access, and technical rigging. Milled from solid aluminum with a 90 kN minimum breaking strength and PPE certification, it excels as a single master point in critical operations such as drop testing or twin tension rope systems (TTRS). The clear digital display and Bluetooth connectivity provide instant feedback in the field, while the rugged build and included components make it easy to deploy, transport, and protect.

Engineered for performance and insight, LineScale 3i logs up to 50 hours of high-resolution data and measures up to 1,280 samples per second—capturing every peak load with unmatched precision, even in dynamic events. With storage for over 200 million data points and seamless USB downloads, post-operation analysis is fast and intuitive. Through its long battery life, water resistant rating, free app, and key accessories, LineScale 3i ensures you’re fully equipped, whether you’re monitoring anchor forces or evaluating system performance under real-world loads.

Both a next-level teaching tool and a powerful addition to any rigging cache, LineScale 3i enhances testing protocols, improves training outcomes, and supports safer decision-making in live operations.

LineScale 3i Features:
Strong: Milled from solid aluminum with a 90 kN MBS and PPE certification – excels as a single master point in rigging scenarios including drop tests and TTRS.
Smart: Log up to 50hrs of data and store 230 million data points for easy extraction and analysis. Monitor and record remotely via Bluetooth and the free app.
Fast: Speed is critical for measuring dynamic events. LineScale 3i captures precise data at 1,280 samples per second – ensuring you don’t miss the peak load.
Fully Equipped: Comes with a full set of accessories for easy transport and deployment including the padded case, screen protectors, and USB connectors.

LineScale 3i Specifications:
•   Minimum Breaking Strength: 90 kN (20,232 lbf)
•   Working Load Limit: 30 kN (6,744 lbf)
•   Scan Rate (Onboard / USB): Fast: 1,280 Hz; Slow: 640 Hz
•   Scan Rate (Bluetooth): Fast: 40 Hz; Slow: 10 Hz
•   Measuring Accuracy: +/-0.75%; +/-0.5% at 3-15 kN
•   Display Units: kgf / lbf / kN (Digit Height: 2 cm)
•   Storage Capacity: 50 hours of logs; 230 million data points
•   Operating Endurance: 50+ hours in powersave; 20 hours Bluetooth
•   Operating Temperature: 32-105 F (0-40 C) tested to -10 to 50 C
•   Battery Type: 3.7V 1600 mAh Lithium Polymer
•   Protection Class: IP68-0.1 (waterproof to 0.1 m for 1hr)
•   Body Material: High strain aviation aluminum LY12CZ
•   Dimensions: (LxWxH) 7.5 x 3.5 x .8 in (19 x 9 x 2 cm)
•   Load Eyes: 5.8 x 3.7 cm (R28 D-Shape)

CE Certifications:
•   PPE certified in compliance with Regulation (EU) 2016/425
•   Recommended for use according to PPE-R/11.114 V3:2021
•   Issued by VG11 (Protection against falls from a height)

UIAA Certification: UIAA 130 V1:2021 safety label for load-sharing devices

Comes Fully Equipped:
•   LineScale 3i Load Cell
•   Plastic Tough-Case w/ Padding
•   Rubber Edge & Screen Protector
•   Anti-Glare Screen Protector
•   4 GB Dual-USB Flash Drive
•   7 CM Micro-USB Adapter Cable
•   Firmware Upgrade Dongle
•   Quick Start Guide & Manual