This is the COLT - Clamp On Line Tension meter with Bluetooth output to free iOS and Android app from Crosby Straightpoint. The COLT is the perfect wire rope meter and clamp on tension meter to measure the tension in elevator car wire ropes up to 1" in diameter. 

The app features a bifunctional Elevator Mode, which can be used to weigh or balance elevator cars in new installations and in maintenance or repair applications.

The tool and app combine to measure tension on each cable, automatically calculating car weight; it also measures and calculates balance of load across up to 10 cables.

The app then prepares a full report that can be emailed from the smartphone also recording worksite GPS co-ordinates and local weather conditions.

Its unique sheave design means wire ropes from 3/16" to 1" diameter can all be measured without the need to change sheaves. Unlimited wire rope database - over 160 are currently stored in the cloud database - view the current wire rope database here

The COLT is waterproof to IP67 or NEMA 6 and has been drop tested from 10 feet and retains accuracy making this the ideal tool for workers in the field checking line tensions. 

Supplied with a wire rope diameter gage and now includes calibration verification rod allowing the user to check calibration accuracy in the field.