These extensometers use a high-temperature capacitive sensor and do not require any cooling. They will open maximum temperature limit of most environmental chambers used in materials testing. The Model 7642 is composites, metals and high temperature polymers in tensile, compression or cyclic testing. All units can be both compression and tension. The extensometer is supplied with the advanced DT6229 controller. The standard output is 0-10VDC analog calibrated with the extensometer. This system provides a number of functional enhancements, including high output, built in calibration and tare functions, analog and digital filters, and more.