The E3H2-R2B4M 2M is a sensing/switching device manufactured by Omron. It is a inductive proximity sensor, designed for non-contact sensing of metallic objects. It is capable of detecting objects up to 2 mm in front of the sensing range, and has a sensing range of a maximum of 2 mm. Its sensing range is not affected by dust, noise, water, oil or changes in ambient temperature, making it ideal for use in industrial environments. The E3H2-R2B4M 2M is rated for IP67 protection, so it can be used in wet and dusty environments. Its small size and built-in mini-connector make it easy to install and allow for flexible wiring, making the unit suitable for both fixed mounting and handheld applications.