San (letter) San (letter) San (Ϻ) was an archaic letter of the Greek alphabet. Its shape was similar to modern M, or ϡ, or to a modern Greek Sigma (Σ) turned sideways, and it was used as an alternative to Sigma to denote the sound . Unlike Sigma, whose position in the alphabet is between Rho and Tau, San appeared between Pi and Qoppa in alphabetic order. In addition to denoting this separate archaic character, the name "San" was also used as an alternative name to denote the standard letter Sigma. The existence of the two competing letters Sigma and San is
Torque tester an actual process. Torque tester A torque tester is used as a quality control device to test or calibrate torque controlled tools. This includes electronic torque wrenches, click torque wrenches, dial torque wrenches, electric screwdrivers, air screwdrivers, pulse tools, cordless screwdrivers, nutrunners, and torque screwdrivers. Today’s advanced torque testers include the ability to measure in clockwise and counter-clockwise directions, convert to 8 engineering units (in·oz, in·lb, ft·lb, N·m, cN·m, kgf·cm, gf·cm, kgf·fm), 3 modes of operation (peak, 1st peak, track), and include a National Institute of Standards and Technology (NIST) certificate (or its domestic pendant). A torque transducer, similar to