Contactless Digital Hall Switch Sensors

Standex Electronics’ digital Hall switch sensors yield reliable, high-precision magnetic sensing over greater detection gaps while enduring the harsh demands of industrial applications. The Hall switch sensors use solid-state Hall effect technology with proven long-term reliability providing bounce-free operation over a broad temperature span. Another key element ensuring the sensor’s longevity is that Standex Electronics manufactures its sensors in a fully sealed, environmentally durable housing.

Both the HS1 and DHS1 Hall switch sensors measure speed, position, proximity, or count at a 55 gauss switch operating point. The HS1 Hall switch sensors use a single digital square wave output pulse that is south pole sensitive. This unipolar sensor does not respond to north pole magnetic fields but only switches ON/OFF in the presence or absence of a south pole magnetic field. When the south pole magnetic field is present, an HS1 sensor with NPN output will switch ON and signal a low output. However, a PNP output will go high when the sensor switches on.

The DHS1 Hall switch sensors are omnipolar and function as a directional limit switch using dual digital pulsing outputs, one south pole and one north pole. In this case, one can mount magnets at either end of the range of motion. When the south pole field is detected, the sensors’ channel A output switches ON and goes low, while channel B output is OFF and goes high. Conversely, when the south pole field retracts, the sensors’ channel A output switches OFF and goes high while channel B output is ON and goes low. Please note that the south pole element is located closer to the sensor face and will be detected at a slightly larger operating gap.

Hall switch sensors work in any orientation. Standex Electronics’ sensors sealed in threaded housings are supplied with lock nuts which are used to set the air gap. In contrast, the easy-install flange mount housings create a fixed air gap between the target and sensor face. The target detection gap depends on the shape, size, and ferrous content of the target.

Standex Electronics customize Hall switch sensors to users' specific applications, including selective unipolar or omnipolar detection. Modify, update, or enhance any sensor with a vast selection of housings and connections. Sensor housings include but are not limited to molded, aluminum, stainless steel, threaded, flange mount, and user-specific packages. Connection types include integral connectors, Deutsch, Amphenol, pigtails, and free-end wires, any length. Typical applications include speed, position, proximity, or count detection rare earth magnets or magnetic fields in automotive and heavy equipment, agricultural equipment, manufacturing, and industrial systems.