USM-3 Ultrasonic Stress Meter

As design engineers push the envelope to provide greater strength and efficiency in bolted joints, the use of torque, torque and angle, or even tensioning as the method of tension control may not be adequate, leading to costly failures. In those applications, ultrasonic bolt elongation/load measurement can provide accuracy equal to strain gauging without the need to strain gauge a bolt. In addition, the use of ultrasonic bolt measurement allows the user to return at any time and re-verify the level of tension in each fastener over its service life. The USM-3 has been both laboratory and field-proven to be the most accurate, reliable and cost-effective solution to bolting failures which could place workers at risk, lead to the loss of production and/or cause damage to capital equipment.

• Large 1/4 VGA back lit display is easily visible from a distance and in poor light.
• Can store up to 4000 bolts, 20,000 elongation and load readings.
• Rugged steel and aluminum case designed for production, field and construction environments.
• USM-3 is supplied in a rugged watertight (Pelican®) case complete with AC adaptor, nylon carrying case, 10’ (approx. 3m) transducer cable, data transfer cable, 4 oz bottle of couplant, batteries and operator’s handbook.
• Measures fasteners of virtually any material from 1/2 inch (12mm) to over 50 feet (15m) in length.
• 0 - 10V analogue output for control of tightening tools such as a Norbar Pneutorque® multiplier.
  Fast update speeds.
  Measurement modes of pitch-catch and pulse-echo.
• Unit can be operated with mains power supply (96 to 264 Volts) or via 4 ‘C’ cell batteries.
• Sealed membrane keypad with tactile keys.
• Works with magnetic and glue on transducers from 1 MHz to 10 MHz