Hall-Effect Digital Position Sensors have omnipolar design.
November 12, 2009 -
Operated by north or south pole of magnetic field from permanent magnet or electromagnet, SS351AT/SS451A sensors eliminate need for magnet polarity to be identified. They operate from 3-24 Vdc and up to 302°F and offer built-in reverse polarity protection. While SS351AT is subminiature SOT-23 SMT device available on tape and reel, SS451A is supplied in leaded, flat TO-92 package. Thermally balanced IC provides stable operation over temperature range.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Honeywell Sensing and Control
1985 Douglas Dr. North, MN10-192B
Golden Valley, MN, 55422
USA
Honeywell's Omnipolar Hall-Effect Digital Position Sensors Simplify Installation and Help Reduce System Costs
SS351AT and SS451A are Price Competitive, Operate from a Voltage as Low as 3 Vdc, and Offer Reverse Polarity Protection
MINNEAPOLIS, November 9, 2009 - Honeywell (NYSE: HON) today announced the SS351AT and SS451A Omnipolar Hall-Effect Digital Position Sensors that can be operated by a North pole or a South pole, eliminating the need for the magnet polarity to be identified, which simplifies installation and can reduce system costs.
The SS351AT is a subminiature SOT-23 surface mount device that is available on tape and reel, which allows for automated pick-and-place assembly, helping to reduce the customer's manufacturing costs. Its subminiature size occupies less space on the printed circuit board (PCB) than standard Hall-effect sensor packages such as TO-92 or SOT-89, allowing for use in smaller assemblies. The SS451A is available in a leaded, flat TO-92 style package. Honeywell has optimized the size of the integrated circuit, saving on manufacturing costs while still meeting customer requirements. These manufacturing cost savings result in lower costs to customers.
Potential commercial applications include speed and RPM sensing in fitness equipment, magnetic encoder for building access, damper or valve position control in HVAC equipment, flow rate sensing in appliances and water softeners, and printer head position sensing. Potential industrial applications include flow rate sensing in industrial processes, robotic control (cylinder position monitoring), and float-based fluid level sensing. Potential medical applications include displacement sensing in hospital beds and medical equipment, and medical bin monitor on portable drug carts.
The SS351AT and SS451A are very small, versatile sensors operated by the magnetic field from a permanent magnet or an electromagnet. A 3 Vdc to 24 Vdc supply voltage range and the ability to operate up to 150 °C [302 °F] expand application opportunities. Built-in reverse polarity protects the device from potential damage during installation. Their thermally balanced integrated circuit provides stable operation over a wide temperature range.
Honeywell International (www.honeywell.com ) is a Fortune 100 diversified technology and manufacturing leader, serving customers worldwide with aerospace products and services; control technologies for buildings, homes and industry; automotive products; turbochargers; and specialty materials. Based in Morris Township, N.J., Honeywell's shares are traded on the New York, London, and Chicago Stock Exchanges. For more news and information on Honeywell, please visit www.honeywellnow.com.
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