Electro-Sensors, Inc. Gear Tooth Sensor HE-950

Gear Tooth Sensor Features • Senses broad range of ferrous target sizes • Senses a frequency range up to 12 kHz • Gap sensing capability up to 3 mm • Full output down to zero Hz • Rugged, NEMA 4 sensor housing • Available with 3/4in or 18mm threads The HE950 produces digital pulse signals for use with speed switches, tachometers, counters, signal conditioners, or as a direct pulse input into programmable controllers (PLCs). It incorporates a dual Hall Effect sensor and signal processing that switches in response to differential magnetic signals created by a ferrous target. Typical targets are gear teeth, keyways, or bolt heads, and the circuitry achieves true zero-speed operation down to zero Hz. Each sensor is entirely solid state with no moving parts to wear out, providing a low maintenance rugged and long-lasting sensor. The HE950 sensors are powered by 5-24 VDC, provide an NPN open collector output and can be mounted up to 1,500 feet from the control unit. The standard HE950 sensor has a threaded aluminum, NEMA 4 housing and is supplied with an adjustable, plated-steel mounting bracket and 10 feet of 3-conductor shielded cable.