LVDT Type Extensometers - Tinius Olsen

BulletinTD-2001LVDT Type ExtensometersExtensometers measurestrain, the change in lengthof a specimen divided bythe original length (gaugelength) of the specimen.An extensometer measuresstrain by means of knifeedges that contact thesample, one of which isfixed in its position, and theother which is located ona moveable arm. On thesemodels, the moveable arm is pivoted,one end is the knife edge and theother is attached to an armature thatmoves through an LVDT coil. Most ofthese extensometers can be adaptedto your exact specimen holding needsby the options that are described onthe back page, but in their standardform hold flat or round specimensfrom 1/16” to 5/8” (1.6 mm to 16 mm).LS Models — English UnitsMODEL Measuring Gauge Calibrated Averaging Film Breakaway Sheet Extension PneumaticRange Length Ranges Clamp Release Metal Bracket ReleaseLS-8%-0.5 3LS-8%-1LS-50%-1LS-8%-1.4LS-50%-1.4LS-4%-2LS-10%-2LS-20%-2LS-50%-28% 0.5 in 8%, 4%, 2%8% 1 in 8%, 4%, 2% • • • • •50% 1 in 50%, 25%, 12.5%, 5% 1 , 2% 2 • • •8% 1.4 in 8%, 4%, 2% • • • • •50% 1 in 50%, 25%, 12.5%, 5% 1 , 2% 2 • • •4% 2 in 4%, 2%, 1% • • • • • •10% 2 in 10%, 5%, 2.5%, 1% 1 • • • • • •20% 2 in 20%, 10%, 5%, 2% 1 • • • • •50% 2 in 50%, 25%, 12.5%, 5% 1 , 2% 2 • • • •LSM Models — Metric UnitsMODEL Measuring Gauge Calibrated Averaging Film Breakaway Sheet Extension PneumaticRange Length Ranges Clamp Release Metal Bracket ReleaseLSM-8%-12.5 3LSM-8%-25LSM-50%-25LSM-8%-35LSM-50%-35LSM-4%-50LSM-10%-50LSM-20%-50LSM-50%-508% 12.5 mm 8%, 4%, 2%8% 25 mm 8%, 4%, 2% • • • • •50% 25 mm 50%, 25%, 12.5%, 5% 1 , 2% 2 • • •8% 35 mm 8%, 4%, 2% • • • • •50% 35 mm 50%, 25%, 12.5%, 5% 1 , 2% 2 • • •4% 50 mm 4%, 2%, 1% • • • • • •10% 50 mm 10%, 5%, 2.5%, 1% 1 • • • • • •20% 50 mm 20%, 10%, 5%, 2% 1 • • • • •50% 50 mm 50%, 25%, 12.5%, 5% 1 , 2% 2 • • • •Notes1 - must have a 10:1 strain range 2 - Optional fifth strain range required (25:1) 3 - A counterbalance support must be usedStandard extensometers can be used at temperatures from -100 to 250 °F (-75 to 120 °C) or with modifications from -300 to 500°F (-185 to 260°C) denoted suffix T