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lineGrip lineScale 3

A revolutionary digital all-in-one bluetooth dyno / load cell. PPE certified, 1280Hz (<1ms) fast, 30kN WLL, and unique onboard-logging of up to 50 hours. The huge load eyes and 90kN breaking strength make it perfectly suited as a generous master point for any type of rigging challenge.

Shop for a lineScale now

lineGrip lineScale 3 • digital BT dyno / load cell

The LineScale-3 is a crowdfunded project which was launched on Dec. 16th 2020, and fully funded 4 days later. The funders’ investment will pay for hardware- and software development, PPE-Certification, and production of 1000 units,

Development was started on Dec. 30th, and the retail units are expected to hit the shelves in Sept. 2021.

Join the lineScale project group for more information and development status posts: www.facebook.com/groups/lineScale.3.project/

Current production status as of March 15th: The prototype is almost finished and should arrive here in the next 2 weeks for extensive testing and verification.

The first 111 units will be sold for 12% discount (- $100), the next units for 6% discount until the LineScale is available from stock. From there on it will sell for MSRP $795.

> Get your lineScale with 12% discount today, as long as it’s still in development.

Jump directly to your subject of interest below:
Key details
On-board logging
OLED display
Power Management
Scan rate

LineScale-3 prototype rear view

The following images are in part pictures and in part 3D renderings.
The pictures of the golden units are of the predecessor LineScale-2 for demonstration purposes (body size and shape is identical to LS3).

LS3 Key Specs

Working Load Limit (WLL) 30 kN (6600 lbf)
PPE Load Limit  10 kN (2200 lbf)
Min. Breaking Strength (MBS) 90 kN (19800 lbf)
Measure L  x W x H 190 x 90 x 20 mm
Size load eyes 60 x 40 mm (R30 D-Shape)
Weight (incl. battery) 495 g (17 oz)
Operating temperature 0° to +40° C (32° to 105° F)
Relative operating humidity 10% to 80% RH
Protection Class IP65

Electronic Specs

Measuring range -10 % to 110 % WLL
Display units kgf / lbf / kN
Maximum range 3000 kgf / 6600 lbf / 30 kN
Display division (resolution) 1 kg / 2 lbf / 0.01 kN
Measure error  ±0.25% (@3kN-15kN)
Sensor scan rate
(cycle rate)

Fast USB/on-board log: 1280 Hz (<1ms)
Slow USB/on-board log: 640 Hz (1,5ms) 

Fast BT: 40 Hz (25 ms)
Slow BT: 10 Hz (100ms)

Battery 3.7V 1350 mAh rechargeable Lithium battery pack
Operating endurance ca. 30 hours continuous
(20h w. bluetooth enabled)
Charging & download/live port Unique dual Micro-USB
Interface Bluetooth 4


Material body aviation aluminum alloy LY12CZ
Body finish satin, steel ball shot peened
Coloring anodized in discrete misty-copper-grey color
Manufacturing technology true unibody, milled from solid block
Assembly Method hidden screw adhesive sealed

Safety is Paramount

This device is milled out of one solid block of high-tensile aviation aluminum (LY12CZ), giving it a whopping 90kN MBS. In terms of safety this is the best deal you can get. Theres no bolts, screws, rings, pistons or joints that could possibly fail… this is the security of mind you need when leaving the scale in the rope access rig while working on it, or in the highline rig while walking it! Independent break testing resulted in a mind blowing 110kN! (see below)

The LineScale-3 is PPE certified to give you peace of mind when your life depends on it. This certification also makes the LS3 suitable for industries such as rope access, height workers, event riggers, arborists, rescue workers, stunt riggers, etc., and PPE professionals of any kind.

Working Principle

The lineScale works by the priciple of material micro deformation: Wikipedia – Strain Gauge

User Configurable

A threshold load value can be set in the Android and iOS app to sound an alarm when reached.
The displayed unit (kg, lb, kN) and the auto power off time can easily be selected and saved as preset by the user.

LineScale-3 prototype USB ports
LineScale-3 label and display design
lineScale dyno - super versatile
lineScale dynanometer w. high accuracy
lineScale dyno dynanometer with bluetooth connectivity and smartphone app
LineScale-3 inside view electronics sensors
LineScale-3 Prototype screen detail
lineScale-2 break testing HNTH