Lvbu ebike kit does not have a torque sensor. 

Lvbu ebike kit uses the intelligent assist system developed by ourselves. The assist system is based on the speed, acceleration, the slope of the road, and the assist level that you set in the APP or display, calculating out the power you need. It will assist you automatically when you pedal. The assistance is as smooth as the torque sensor system. We will keep optimizing the assist system by updating the firmware. The user can upgrade it to the latest firmware in the APP.
Click here to view 【Assist System Introduction】https://www.lvbu.tech/en/help/questionDetail/33