HIGH PERFORMANCE 4-20 mA
The new 4-20HR-MaxSonar-WR sensors from Maxbotix are high accuracy ultrasonic sensors featuring a
4-20 mA output.
are a low cost
for use with
sensors offer superior rejection of outside noise sources
and feature speed of sound temperature compensation.
The 4-20HR-MaxSonar-WR sensors provide range
information from 50 cm to 500 cm, and have a 1.6 mm
resolution, an operational temperature range from - 40°C
to + 65°C (- 40°F to +149°F), real time automatic
calibration, a 200,000+ hours MTBF, an operational
voltage range from 12V to 32V, and a low 20-40 mA
average current requirement. The sensors function well
with multiple sensors in the same location, and they are
RoHS and CE compliant.
A six-pin screw terminal header is included to simplify
system connections for quick installation in applications
such as: tank level measurement; tide/water level
monitoring; solar/battery powered applications; industrial
automation; and outdoor vehicle detection.
The 4-20HR-MaxSonar-WR sensors (and previous IP67
MaxBotix sensors) are manufactured in a variety of
packages for easy mounting in existing fittings. The
sensors are available in M30x1.5; 1” BSPP; 1” NPTS; and
3/4” NPTS PVC pipe fittings. Pricing starts at $199.95
each and $134.37 in 100 unit quantities.
Saelig Company, Inc., now has available the Prolific PL2303RA — an all-in-one IC that provides a
convenient low chip count solution for connecting an
RS-232 full-duplex asynchronous serial device to any
USB-capable host. This on-chip solution with its built-in
charge-pump RS-232 transceiver and widely compatible
virtual COM port drivers, and compact and low power
serial devices can be made USB-ready easily.
The PL2303RA integrates a high baud rate RS-232
transceiver that meets the EIA/TIA-232F and CCITT V. 28
communications interface specifications. The RS-232
transceiver is a three-transmitter/five-receiver design with a
built-in high efficiency charge pump circuit. Adding
external 1 µF capacitors provides the required bipolar
output to the transmitters to deliver the correct RS-232
output voltage levels without requiring external active
components. The PL2303RA operates at a very low
power consumption with a guaranteed data rate up to
1,000 kbps, and also features an active-low shutdown
By taking advantage of USB bulk transfer mode, large
data buffers, and automatic flow control, the PL2303RA is
capable of achieving higher throughput than traditional
UART (Universal Asynchronous Receiver Transmitter)
ports. The flexible baud rate generator of the PL2303RA
can be programmed to generate any data rate between
75 bps to 1 Mbps. It supports remote wake-up from any
of its RS-232 input pin signals. Four general-purpose I/O
pins are also available for use in product designs.
The PL2303RA has been designed with compact
mobile and embedded solutions in mind; its small
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For more information, contact: