Analog Proving Rings

The calibration standard against which all others are measured. Throughout the world in industry and standards laboratories, t The calibration standard against which all others are measured. Throughout the world in The calibration standard against which all others are measured. Throughout the world in industry and standards laboratories, the Morehouse Proving Ring is recognized for it's lasting reputation of unquestionable accuracy in the measurement of mechanical forces. For this reason, it is accepted as a prominent standard for the calibration of testing machines, torque measuring dynamometers, thrust standards, electronic and hydraulic load cells, and many other force measuring devices and systems. and standards laboratories, the Morehouse Proving Ring is recognized for it's lasting reputation of unquestionable accuracy in the measurement of mechanical forces. For this reason, it is accepted as a prominent standard for the calibration of testing machines, torque measuring dynamometers, thrust standards, electronic and hydraulic load cells, and many other force measuring devices and systems. he Morehouse Proving Ring is recognized for it's lasting reputation of unquestionable accuracy in the measurement of mechanical forces. For this reason, it is accepted as a prominent standard for the calibration of testing machines, torque measuring dynamometers, thrust standards, electronic and hydraulic load cells, and many other force measuring devices and systems.