Gear Tooth Sensors

Standex Electronics' single-channel target tracker gear tooth sensors are a family of dynamic non-contact speed sensors that deliver remarkable near 0 speed operation with accuracy and repeatability over a long lifetime. These sensors use Hall effect technology which features a solid-state design with no wearing components. Solid-state gear/ferrous target tracking sensors also feature internal hysteresis, bounce-free operations, and stable operation over a wide temperature range. Gear tooth sensors output a single digital square wave pulse to determine speed or count. They detect 0 to 32 pitch gears, bolt heads, holes in plates, and other magnetic targets. Electrical options include, but are not limited to, load dump and EMI protect input, NPN or PNP with 5 k pull-up resistor, TTL, and more.

The sensor turns ON when it detects that ferrous metal is present, such that an NPN output would signal low, whereas a PNP output would go high in the presence of a magnetic field. These sensors power up with the output transistor OFF. This transistor turns ON for the first time on the approach of a tooth. After the first tooth, they will not miss a target. These gear tooth sensors work in any orientation and feature a self-calibrating output that reacts to both the leading and falling edge of any ferrous metal target. Standex Electronics’ various standard and custom housing options include easy-to-install flange mount designs that set the air gap relative to the target face and threaded housings allowing users to set the air gap with the provided lock nuts.

Standex Electronics' quadrature gear tooth sensors can measure speed and direction or count up/down with direction from a single sensor head. Other gear tooth sensors can be customized in various electrical options. Many housing and connection options are available, including, but not limited to, molded, aluminum, stainless steel, threaded, flange mount, and customer specific packages. Additional connection types include integral connectors, Deutsch, Amphenol, many other brands, pigtails, and free-end wires, any length. Typical applications include speed or count of gears in automotive and heavy equipment, agricultural equipment, and other ferrous targets in manufacturing and industrial applications.