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Passive Magnetic Sensors
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
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 variable
reluctance sensors in
everything from low-cost consumer products to
highly-accurate automotive
engine ignition systems to flight-worthy aircraft engine
controls.
Hall Effect Sensors
Ai-Tek has taken its years of experience of designing
and manufacturing
Hall Effect 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 sensors to meet your various design needs. The
design is flexible to
easily meet all of your application requirements.
The Hall Effect 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. This type of sensor is known as a "P"
type because it uses 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
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 sensor design.
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