BIQU Belter Belt Tension Tool Upgrade High Precision, Belt Tension Gauge Meter Tester 2GT Timing Belt Tensiometer for 3D Printers, Hollow Aluminum Alloy Frame Design Improves Reading Accuracy

Works great, when you read the instructions. The blue plastic pieces are not included, the instructions link you to the GitHub to download and 3d print them yourself. Also links to a spreadsheet with the information you need to measure and adjust your printer appropriately ( would love more printers settings included).

Used this to measure the tension in my 3D printers belts. When I first ordered it I really thought twice about buying it but I'm glad I did. It makes measuring the tension easy then using the sound method and other 3D printed devices that are just a guessing game.

Will not zero out no mater what I do. Change the battery, turned it off and on, but it bounces from .01 to .005, and if you just touch it, it moves to -.01 to .05. So how can you trust the readings? Would not recommend.

Seems to work well (basically a spring loaded caliper) but is missing blue parts show in product pictures. If I can download all and print those parts no problem, if not then the item is not as described.

When dialing in belt tension on things like a CoreXY 3D Printer you can use the harmonic method and have success. But harmonics can be rather subjective. If you are like me then tools that give you a more stable # to work with then this is your tool. More or less its a caliper that measures belt tension with minimal external noise in the measurement (as harmonics can have). Nice tool, do recommend.