There are over 50 crane-related fatalities in the US every year and approximately 1,500 lost time accidents. Over half of these casualties are caused by falling objects, i.e., “sudden rigging failure”.

-Source: US Bureau of Labor Statistics


Smart Sling Technology is the world’s only electronic overload monitor for use with synthetic slings. Exclusive to Twin-Path® Roundslings, Smart Slings are positioned to change the rigging industry by delivering the end user immediate, definite, and life saving alerts for sling overload or failure.


  • Reduce risk to your workers
  • Reduce costly accidents
  • Accountability
  • Peace of mind
  • Improve morale
  • Objective safety milestones
  • Monitor multiple job sites remotely


  • Instant notice of critical overload
  • SMS text message & email alerts
  • Intuitive software
  • Track 50 slings at once
  • 1,000+ foot range
  • Two-Year battery life
  • Water resistant

Before, during, and after your lift, Smart Sling continuously communicates with our software.

Smart Sling detects severe overload immediately. When our software displays a green rectangle you can rest assured that your slings have not been severely overloaded. If severe overload occurs Smart Sling will instantly detect the overload and deliver alert messages in the form of SMS text message, email alert, and on screen warning (red rectangle) to anyone you choose. If overload occurs Smart Sling notifications are displayed and logged.




Click Here to Learn More about Smart Sling


Sling and Sensor
Base Station
Computer and Software


U.S. Patents: 9293028 • 9589444 • 9892616

SpecificationsSling SensorBase StationLaptop
IP RatingIP67 (submersible to 1m depth)IP44 (splash proof)N/A
Operating Temperature-40° F to 120° F-40° F to 120° F32° F to 95° F
Storage Temperature-40° F to 120° F-40° F to 120° F-40° F to 149° F
Dimensions1.5” x 2.25” x 5” (H x W x L)
(inside sling)
1.3” x 3.5” x 5.75”
(H x W x L)
0.8” x 5.7” x 10.1”
(H x D x L)
AntennaIntegrated5 inch Folding Swivel
Frequency Band915 MHz ISM (US)915 MHz ISM (US)N/A
Power Source2 X Non Rechargeable Lithium
Metal Batteries (3.6V)
USB Micro-B (5V)Integrated 2-Cell 32 WHr
Li-Ion Battery
Current Consumption< 85 μA< 400 μAN/A
Battery Life1-2 years (continuous)N/AVaries on operating
Range500 ft (150 m)500 ft (150 m)N/A