The OMRON H7ER-N-B is a high-precision, self-powered digital tachometer designed for industrial automation applications. Featuring a 4-digit LCD display, this compact device is ideal for monitoring rotational speed in various machinery. Its flush mounting capability and screw terminal external connection make it easy to integrate into existing systems. The H7ER-N-B operates without a voltage input, ensuring reliable performance with minimal power requirements. Perfect for environments where space and power efficiency are critical, this tachometer offers a cost-effective solution for accurate speed measurement.