Electric torque wrenches aren’t necessarily better than other style wrenches but they do have capabilities that some other models don’t. The best tool for your job will require often on the requirements of the job site and available power sources.
The V-RAD Series has a stated accuracy of +/-5% and a Repeatability of +/-2%
Yes, it is recommended that you calibrated all torque tooling atleast once a year. You might require a more frequent interval of calibrations due to the usage of your equipment.
Electric torque wrenches can be used in hazardous environments but will require a hot work permit. It is only our BL-Select series that carries a Class 1 Div 2 certification to be used in hazardous/explosive environments (this excludes the connection of the battery pack).