Description: A Hall Effect Speed Sensor or HESS is an electronic device that is designed to sense ferrous targets such as steel gears. It can detect gears from 24 D.P. and above with a maximum sensing distance of 1 mm or 0.040”. The Hall Effect Speed Sensor has an operating frequency of between 0 and 10 kHz and an operational temperature range of -250C to 700C. In effect, the sensor operates without a minimum threshold speed, a major characteristic of magnetic pickup sensors. The sensor’s ideal operating voltage range is 8V to 30V of DC power. Also, it works at 30 mA maximum load and has reverse polarity protection. The HESS sensor comes in a stainless steel case and can be mounted to lie flush with metal panels. It also has a 10 foot (3.05 M) long cable with a 10 lbs (4.5 Kg) strain relief for 60 seconds. Contact our experts at MRO Supply if you have any questions about which sensor is best suited for your application. These sensors are ideal for a range of applications including Tachometric inputs and all Red Lion Controls sensing Gears.