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VOLUME -26 NUMBER 2
Publication Date: 02/1/2011
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Special Features: Components and Distribution
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February 2011 Issue
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APEM Hall Effect Switches for Rugged and Harsh Uses
Hall-effect pushbutton switch.
Haverhill, MA — APEM has introduced two new Hall effect switches, designed to work in the most rugged and harsh environments. The new IH series of switches are low maintenance, contactless, sealed pushbuttons that come in two versions: linear proportional output, and momentary switch.
The switches are made of extremely durable materials, including switch bushings of Zamak, a robust family of alloys with a base metal of zinc and alloying elements of aluminum, magnesium and copper. Life expectancy for both versions is estimated at above 5 million cycles — at least 10X more than the classic mechanical switch, which is generally rated for about 500,000 cycles. The IH linear version is suitable for control valves or variable speed drives. Applications include industrial controls, heavy duty equipment and other handling applications where operators need to control motion and speed. The linear version can also function as an additional axis for handgrip/joystick operations. It is designed to react to the pressure exerted on the switch; response is proportional to actuator travel. Hall effect technology ensures no-contact, low wear and tear for reliable, long life. Mechanical life for the linear version is estimated at 5 million cycles. The switches have outputs ranging from 0.5 to 4.5V. The more the switch is pressed, the higher the output voltage.
The linear version can be tuned to three different operating forces — soft, standard, and hard. Many other Hall effect switches work with a fixed 5V, a drawback for designers who may want to use the switch in a vehicle with a 12 or 24V battery, for example. To use a 5V linear switch in those circumstances would require a regulator to adapt the switch, making the IH linear switch's regulator options a particularly cost-effective solution. Linear output can also be customized.
EMC testing conducted in accordance with IEC/EN61000-4-3 showed 10V per meter extend to radiated fields in a frequency range of 80 Megahertz (MHz) to 1000MHz.
The IH linear version is sealed to IP67 according to IEC 60529 and is rated to operate in temperatures ranging from -40 to +85°C. The switch's total travel is 4mm (0.160-in.) It offers a compact size case of 12mm (0.472-in.) and a shallow behind-panel depth. The momentary switches are rated for 28VDC at a maximum of 50mA. Supply voltage ranges from 3.5 to 24VDC. In the off position, the IHS switch consumes 2.5 to 5mA.
Similar to the linear version, the IH switch version is also sealed to IP67, rated to operate in temperatures ranging from -40 to +85°C, and offers a compact size and a low behind panel depth. The switch's total travel is 1.70mm (.070-inches). It has an operating force of 6N±2N.
Contact: APEM Components, Inc., 63 Neck Road, Haverhill, MA 01835
978-372-1602 fax: 978-372-3534 or 978-372-9516 E-mail: email@example.com Web:
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