Introduction
The GWB-200JA extensometer calibrator is a pure mechanical high-precision displacement micrometer instrument. According to the JJG762-92 extensometer verification regulations, it is specifically designed for calibrating various types of extensometers and is also widely used for verifying displacement sensors as well as corresponding dial indicators and micrometers.

Structure and Reading Method
1. This instrument consists of a precision differential probe and a measurement bracket. The calibration device features a modular design. The precision differential probe and its support arms can be combined in various configurations and positions, complemented by an extended column attachment. It is equipped with diverse sample types including cylindrical, plate, and blade configurations, enabling convenient calibration of tensile gauges across multiple specifications. Users may also customize precision deformation measurements by installing specialized accessories tailored to their specific testing requirements.
2. The precision differential probe consists of a sliding rod, a measuring rod sleeve, and a reading inner tube.