Geartooth sensors withstand the grind
A new line of Hall-effect geartooth sensor modules applies a patent-pending
process to individually tune or back bias each sensor. The result is high
performance components that produce strong, constant signals at air gap
distances which exceed non-biased devices. Known as the HE-6150, HE-6151,
HE-6152, and HE-6154, the modules directly sense rotating ferrous gear-type
targets such as found in transmission gears and shaft encoders. They do not
require special targets and are capable of sensing a wide variety of tooth sizes
and air gaps.
Cherry Electrical Products
Current sensor said to be world's smallest
CUI Stack unveils the SCD series of Hall-effect, pc-board-mounted, open-loop
current sensors. The company says they are the smallest on the market, and the
tiny cube-shaped devices measure just 15 mm square by 20 mm high. Models are
available rated from ±3A to ±20A, with overcurrent capability to ten times the
rated current for 50 msec. The series consists of two basic types, one for
detecting DC current where only the positive half of an alternating current
requires detection, and a second type for detecting direct and alternating
currents.
CUI Stack
Accelerometer measures high-g shocks
The 7270AM6 series of mechanically filtered piezoresistive accelerometers are
designed to not only survive but actually measure the kinds of high-g shocks
that can present trouble for other sensors. Their secret is a built-in
mechanical isolator, developed by engineers at Sandia National Laboratory, which
consists of an aluminum housing lined with two layers of elastomer filter for
cushioning. This isolator mitigates the high-frequency content of a shock pulse,
protecting the sensor from high-g, high-frequency inputs. Models are available
in 6,000, 20,000, and 60,000 g ranges, full scale. Uses include shock testing,
pyroshock events, and other high-g military, lab and industrial applications.
Endevco
Accelerometer meets FAA needs
Designed for military and commercial aircraft carrying digital flight data
recorders, Series 3001-01-XXX Multi-Axial Accelerometers meet the mandatory
requirement for increased sensing parameters as specified by the FAA. Each
accelerometer is hermetically sealed and designed for simultaneous measurement
of acceleration of one, two, or three axes. The measurement range covers +6G to
-3G vertical, ±1G longitudinal, and ±1G lateral. Each consists of up to three
separate seismic sensors containing a bending beam with a bonded-foil strain
gauge--forming a Wheatstone Bridge--and a calibrated mass.
Patriot
Sensors & Controls Corp.
Super CubeTM is super rugged
The Model 657 Super CubeTM provides position sensing that is
virtually immune to damage and perfectly suitable for severe environments.
Protection is supplied by a high-temperature thermoplastic case containing
electronics potted with epoxy fill. In addition to being moisture and dust
proof, Super Cubes will withstand 30g shocks and vibration to 15 gs from 10 to
2,000 Hz. Measuring 5/8 inch on a side, the sensors function from -40 to 125C
for up to 1 million shaft revolutions. It features a proprietary multi-array,
conductive-plastic screen process and laser trimming to provide an output signal
accurate to 2%.
Spectrol Electronics
Rotary position sensor provides reliability
RP200 Series Rotary Position Sensors offer rugged, non-contact technology for
freedom from failure due to wear. The sensors apply a patented, symmetrical
magnetic circuit which minimizes errors due to rotor runout and assembly
tolerances. It generates a linear magnetic field as a function of rotor angle.
This linear magnetic field is then converted to a linear DC voltage by a
Hall-effect IC. Designed to be unaffected by contaminants, they are suitable for
severe environments.
Honeywell Micro Switch Division
Tiny turbine monitors in-line flow
The FT-110 TurboFlow Sensor offers, for its size, the industry's highest
accuracy for in-line flow monitoring. Measuring just 2.2 inches long and 0.7
inch in diameter, the tiny turbine is accurate to within ±3% with 0.5%
repeatability while measuring low-viscosity liquids having flow rates of 0.1 to
8 gpm. Manufactured with FDA-approved materials, the FT-110 is suited for
dispensing systems such as coffee, water, or soft-drink vending machines. It
excels at monitoring product totals and rates in bars and microbreweries. The
sensor's operational temperature range spans from -4 to 212F at pressures up to
200 psig.
Gems Sensors
Airbag sensor offers low-cost performance
Engineers at EG&G IC Sensors introduced LISA to the automotive safety
world. Standing for Lateral Integrated Silicon Accelerometer, the model 3265
makes use of proprietary design and manufacturing techniques. Among them are
Deep Reactive Ion Etching (DRIE) combined with a single crystal silicon to
produce a capacitive sensor with superior performance, low cost, and excellent
long-term reliability. DRIE produces deep structures that increase the
capacitance change of the sensor with acceleration, simplifying the electronics
portion of the sensor and providing a high signal-to-noise ratio. Applications
for this innovative product include both frontal and side-impact airbags.
EG&G IC Sensors
Silicon sensor for low-pressure
A new member of Silicon Microstructures' SM5700 line of silicon pressure
sensors is said to operate at pressures lower than any competing products. Named
the SM5752, it measures pressures from 0.00 to 0.15 psi by means of a specially
designed sensing element. Sensor output is directly proportional to the supply
voltage, which can vary from 5 to 15V. Unlike unamplified silicon micromachined
pressure sensors--whose nominal 0 to 100-mV outputs need amplification--the
SM5752 has a calibrated output of 0.5V to 4.5V, saving designers cost, time, and
complexity.
Exar, Silicon Micro-structures
Division
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