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Control and protection circuits have relied on variable reluctance technology for years. With few components and no moving parts, the passive magnetic speed sensors can provide a signal from the inside of an aircraft engine at temperatures approaching 425°C or from the hub of an automobile wheel at high shock and vibration. The advantages of these speed sensors are: • High reliability• Simple installation • Long life due to no moving parts or contacts • Self powered operation • Wide variety of shapes and sizes • Easy alignment • Can be designed for almost any environment Due to their flexibility, you will find Ai-Tek speed sensors in everything from low-cost consumer products to highly-accurate automotive engine ignition systems to flight-worthy aircraft engine controls. Ai-Tek has taken its years of experience of designing and manufacturing Hall Effect speed sensors for engine timing applications and has developed a line of durable products for industrial use. With multiple standard variations we offer the widest range of standard catalog speed sensors to meet your various design needs. The design is flexible to easily meet all of your application requirements. The Hall Effect speed sensor can sense each change in target movement, regardless of speed, from near zero to 15 kHz frequency range, generating a steady pulse train of frequency proportional to target speed. Typically, each time a gear tooth (or any ferrous discontinuity) passes in front of the sensor the output changes state. These types of speed sensors are known as "P" type because they use N-P-N transistor logic (as opposed to "N" type, which uses P-N-P transistor logic). Key features to note are: • Reverse voltage protection, up to -30 Vdc, to prevent damage if miswired• Higher temperature range of -40°C to +125°C • Wide range of supply voltage in single design of 4.5 – 24 Vdc • Two output options of Supply Tracking or TTL Compatible • Rugged design meeting IEC 77 Standards (European Railroad Applications) Suitable for 20 diametral pitch or coarser gear (target), the standard catalog speed sensors are easily applied to your varied sensing needs. If you have a unique, special requirement which cannot be met with any of the standard options, we will gladly review your specs and work with you on a special speed sensor design.
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