Inductive Linear Transducer EVT

Compact design for precise measurements in confined spaces

The highly compact, inductive displacement sensors in the EVT and EVTB series are designed for short measuring ranges, from ±0.65 mm to ±12.5 mm. Linear movement is detected mechanically, either via a single-sided push rod with an internal return spring, or via a loose push rod for free mechanical coupling. The EVT is notable for its miniature, compact design, with a diameter of only 8–9.5 mm, and can be space-efficiently integrated into harsh environments.

EVT variants are available for high protection classes and pressure tightness.
EVT sensors are available in an IP64 design (EVT/EVT-L) and a pressure-tight IP68 design (EVT-W/EVT-LW). The pressure-tight variants can be used at pressures of up to 3.5 MPa (35 bar), making them ideal for use in environments containing liquids or where there are high differential pressures. The measuring ranges are from ±0.65 mm to ±12.5 mm.

The EVTB series is an economical alternative for compact applications.
The EVTB series complements the portfolio with an attractively priced IP64 solution. Probe and loose core versions are also available. Despite their compact design and affordable price, these sensors offer good linearity and high resolution across short measuring ranges of between ±1 mm and ±5 mm – across the entire EVT series range.

The non-contact measuring principle ensures a long service life and high dynamics.
The inductive LVDT measuring principle is implemented in all variants with permanently moulded coils. The non-contact design ensures a very long service life and enables use with small, oscillating movements and high dynamics. The sensor signal is absolute, meaning the position is available immediately after switching on, without a reference run.

Options:

• Measuring lengths: ±0.65 mm to ±12.5 mm
• Linearity: ±0.25% or ±0.1% (depending on measuring length)
• Protection class: IP68 and pressure-tight (EVT-W/LW only)
• Extended temperature range: up to +200 °C (on request)
• Cable: 2 m standard, special lengths up to 7 m
• Mechanical adaptations: other probe tips, special axes, radial cable outlets (on request)