For the Supply and Support of
Material Testing Equipment
in the United Kingdom and Ireland
High Temperature, Ultra-Low Contact Force Capacitive Extensometers (1200°C or 1600°C) – Model 3648
This model was designed for applications that require ultra-low contact force when using split type materials testing furnaces or induction heaters. It features very low specimen contact force and includes a slide bracket for mounting. Liquid cooling allows use to 1200°C (2200°F) standard or 1600°C (2900°F) with the high temperature option.
These extensometers use a high temperature capacitive sensor in combination with an innovative design to achieve high accuracy strain measurements in low measuring ranges. They 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 extensometer comes with a 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. 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.