Epsilon Technology Corp. High Temperature Capacitive Axial Extensometer Model 3648

These extensometers feature very low specimen contact force and are available in low strain ranges for use in split type materials testing furnaces or with induction heating. Water-cooled and mounted to a slide bracket, these are for use to 1200 °C (2200 °F). The high temperature option allows use to 1600 °C (2900 °F). These extensometers use a high temperature capacitive sensor in combination with an innovative design to achieve high accuracy strain measurements in low measuring ranges not possible with other high temperature extensometers. These extensometers mount on a slide bracket (included) that can attach to the load frame of your test system; optional load frame mounting brackets are available. The standard temperature version (to 1200 °C) is supplied with high purity alumina rods. The high temperature option is furnished with alpha grade silicon carbide rods. Rods are made to order to the length required for your furnace. These units are made to order in many different gauge lengths and measuring ranges. The maximum travel available for any gauge length is ±2.5 mm (±0.10 inches); the minimum is ±0.25 mm (±0.01 inches). The extensometer comes with the Model 3603 signal conditioner. The output is an analog DC voltage, factory calibrated with the extensometer to 0 to ±10 VDC typically. They are readily interfaced with most existing test controllers, and may be directly connected to data acquisition systems and chart recorders. Bringing the signal into a spare DC input channel (or external input) on the test controller allows the extensometer to be used for strain controlled tests like low cycle fatigue.