The HMS current transducer from LEM S.A. integrates a primary conductor into
a surface-mount package measuring only 0.630 by 0.531 by 0.472 in. The device
operates from a single 5-V supply. Four standard versions cover nominal ac,
dc, pulsed, and mixed isolated current measurement of 5, 10, 15, or 20 A rms,
up to 50 kHz, with a measuring span of up to ±3 times IPN.
A version for through-hole mounting will be available shortly.
The internal reference voltage (2.5 V) is provided on a separate pin or can
be forced by an external reference (between 2 and 2.8 V) to allow cancellation
of thermal drift. Gain and offset are fixed so that at IPN the output
voltage is equal to REFIN or REFOUT ±0.625 V.
The HMS employs a LEM ASIC
designed for use with open-loop Halleffect technology. The result is better
offset, gain drifts, and linearity, as well
as a wider operating temperature
range (–40°C to 85°C) compared to traditional discrete technology.
Contact the company for price and availability information.
LEM S.A.
www.lem.com
See Associated Figure
SensorsKavlico's P4100 board-mount pressure sensor features a quick-disconnect
fitting that eliminates the cost of redundant air hose adapters, fittings,
and reducers. Designers can specify a variety of port sizes, including
5/32, 3/16, and 1/4 in., among others. The robust sensor comes in pressure
ranges from 0 to 15 psi to 0 to 300 psi, gage or absolute. It runs on
a 5-V dc supply and provides a linear amplified voltage output, proportional
to pressure, of 0.5 to 4.5 V dc. Contact the company for price and availability
information. To learn more, go to
www.kavlico.comThe low-power LIS202DL two-axis linear accelerometer from STMicroelectronics
addresses a wide range of consumer and industrial applications, from
motion-activated user interfaces to vibration monitoring. Smart features
embedded in the accelerometer include click and double-click recognition,
motion-detection/wakeup, and high-pass filters. The unit's digital output
through a standard SPI/I2C user-selectable interface makes
system integration easier and more effective. The LIS202DL comes in a
5- by 3- by 0.9mm LGA-14 plastic package and is available in ±2-g
or ±8-g acceleration ranges. The devices are available now for
$3 each in quantities of 10,000. For more information, go to www.st.com/mems
Two versatile and multirange-selectable temperature transmitters from
Omega Engineering Inc. are especially useful in process control, automation
systems, energy source management, oil applications, paint and spray painting,
and equipment maintenance. The TX33, with a loop-powered RTD input, is
an analog, non-isolated device with a twowire head-mount that converts
the RTD into a proportional, linear, and very accurate output current.
The TX31 is an analog miniature transmitter with an isolated two-wire
headmount that converts a thermocouple input to a voltage. The TX33 costs
$95.00 and the TX31 is $185.00. For more information, go to
www.omega.com
