UPDATE.JUN–Sensors–wy TEMPERATURE
Heat-flow sensors are low cost
Micro-Foil heat-flow sensors measure heat loss or gain of any surface,
flat or curved. They provide a nominal sensitivity of 2.2
microvolts/BTU/ft2 *hr, with a maximum heat-flux rating of 20 to 30
BTU/ft2 *s. Other ratings are available on request. A Micro-Foil
heat-flow sensor functions as a self-generating thermopile transducer. It
requires no special wiring, reference junctions, or signal conditioning. A
readout is accomplished by connecting a sensor to any direct-reading dc
millivoltmeter (or microvoltmeter) or recorder. ($83 to $97–stock to 3
weeks.) RdF Corp., Hudson, NH Sales 603-882-5195 Fax 603-882-6925 EEM
FILE 5500
Temperature sensors are surface mounted
Series SMS surface-mount NTC thermistor chips are hermetically sealed in
a glass diode package. Primary applications are on-board temperature
sensing and circuit-temperature drift compensation. The sensors operate
from -50 degrees and 300 degreesC, and claim accurate temperature response
and long-term stability. (Less than $0.50 ea/100,000–6 weeks ARO.)
Thermodisc, Inc., Mansfield, OH Jim Holbrook 419-525-8500 Fax
419-525-8344
Platinum RTD elements offer 0.1 degreesC interchangeability
The 1/3 DIN CRZ Series platinum RTD sensors provide greater
interchangeability than any other sensor of their type, according to the
manufacturer. In fact, until now, 1/3 DIN ((+/-)0.04% ≅ 0.
1 degreesC) interchangeability sensors were not readily available. The
sensors are available in either 100- or 1,000-ohm values with the
internationally recognized 0.00385 ohms/Ω/ degreesC temperature
coefficient. Both the 100- and 1,000-ohm versions also conform to IEC and
JIS standards, making them acceptable in both domestic and international
applications. The 100-ohm device is available in a choice of 2 x 5-mm or
3 x 7-mm packages; the 1,000-ohm device come in a 3 x 12-mm package. The
operating temperature range for all devices is -50 degrees to +650
degreesC. ($5 to $8–stock.) ACI Components, Laguna Hills, CA Curtis
Armijo 714-588-9611 Fax 714-588-1855
Surface-mount NTC thermistors feature -2,500 ppm/ degreesC TCR
According to their manufacturer, temperature-sensing CHPT series
surface-mount thermistors are believed to be the most accurate thermally
sensitive resistors available–less than 1% linearity deviation from -10
degrees to +130 degreesC. The first of these thermistors, the CNTC1/8, is
a cylindrical thick-film resistor rated 400 mW at 25 degreesC. It is
available in resistance values from 500 ohms to 10 k Ω, with
tolerances of 2% and a negative TCR of -2,500 ppm/ degreesC. The
cylindrical thermistor fits an industry-standard 1206 footprint for
surface-mount applications, and is compatible with all automated pick-and
place equipment. Typical applications for these resistors include
monitoring battery current in laptop computers and other portable
electronic equipment and fluid temperature monitoring, fuel-injection, and
emission-control systems in automobiles. The CNTC1/8 exhibits less than 3%
deviation from true linearity over the -40 degrees to +150 degreesC
temperature range, and less than 1% deviation from -10 degrees to +130
degreesC. The operating temperature range is -55 degrees to +150 degreesC.
(From $0.60 ea/1,000–stock.) IRC, Inc., Boone, NC Jim McGonnell
704-264-8861
Platinum sensors come in many styles
EL-100/200/700 series platinum temperature sensors closely monitor and
control industrial equipment at temperatures ranging from -320 degrees to
1,000 degreesF. the fully assembled sensors can be shipped ready-to-use
directly or in armored probe assemblies, thereby eliminate the need for
delicate splices to the extension leads. EL-100 and 200 series sensors
employ fine platinum wire wound on high-purity alumina ceramic and are
trimmed to precise tolerance at ice point. In the EL-100, and outer
ceramic tube armors the assembly, while in the EL-200 a stainless steel
tube covers the ceramic tube for added sheath density and protection. The
low-cost EL-700 uses innovative thin-film technology. (From xxx–xxx.)
Hy-Cal Engineering El Monte, CA Philip Douglas 818-444-4000 Fax
818-444-1314
Thermistor probes provide tight accuracy
These temperature-sensing probes operate over a temperature range of -50
degrees to +350 degreesC. Accuracies to as tight as (+/-)0.1 degreesC are
available. Sensors available for use in these probes include NTC and PTC
thermistors as well as IC-type sensors. Key applications for these devices
include appliances, power supplies, medical, and automotive. Custom
temperature-sensing probes are available as well. ($1 to $10 typ–stock.)
Advanced Thermal Products, Inc. St. Marys, PA John Sidoni 814-834-1541
NTC thermistors are low-cost
HVT thermistors are available in 15 standard resistance values ranging
from 100 Ω through 20 ohms. Standard tolerance is 10% at 25 degreesC.
The thermistors are rated to 150 degreesC and have a dissipation constant
of 3.0 to 8.0 mW/ degreesC and a time constant of 10 to 50 s in air,
depending on size. Lead configurations include straight, inside kinked,
and outside kinked. Leads can also be customized to end-user requirements
for high-volume applications. (From $0.20 ea/100,000–stock to 8 weeks.)
Fenwal Electronics, Inc. Milford, MA Mike Speciale 508-478-6000 Fax
508-473-6035
PRESSURE SENSORS
Pressure sensor fits automotive applications
The MPX4100A/4101A series manifold absolute pressure (MAP) sensor
monitors absolute air pressure within a motor vehicle's intake manifold to
compute the amount of fuel required for each cylinder. The sensor consists
of a piezoelectric shear-stress strain gauge and temperature compensation,
calibration, and signal-conditioning circuitry, all on a single monolithic
chip. It is well suited for direct microprocessor interfacing. The
absolute pressure range for the sensors is 20 to 105 kPa. Response time (10%
to 90%) is 1.0 ms. Operating power requirements are 5.1 Vdc typ and 15 mA
max. (xxx–xxx.) Motorola, Inc., Phoenix, AZ xxx xxx
Transducer performs pressure monitoring
The Model FTP in-line, flow-through-type pressure transducer is designed
for pressure monitoring and leak detection of high-purity specialty gases
and liquids like those used in the semiconductor-manufacturing process.
The transducer is constructed from 316 L stainless steel, and has a
super-fine internal finish with a better than 10 μ in. rms finish. This
through-tube design is used to measure pressure without causing
obstructions or creating cavities where eddies can form or contaminates
may collect. The FTP has standard VCR fittings that provide leak-tight
connection. Other pressure fittings are also available. Pressure ranges
from 0 to 100 through 0 to 10,000 psig are available. Optional outputs of
0 to 5 Vdc and 4 to 20 mA are also available. (xxx–xxx.) Sensotec, Inc.,
Columbus, OH Information 614-486-7723 Fax 614-486-0506
Pressure transducer is certified explosion proof
The PDCR 550 is a low-power pressure transducer for applications where
only battery or solar power is available. The transducer, which provides a
1 to 5-V output, can operate from an 8-V supply and has a current
consumption of less than 2 mA. Accuracy is (+/-)0.1% BSL and stability is
better than (+/-)0.1% of full scale per 12 months. Externally adjustable
zero and span potentiometers permit field calibration to be easily
performed. The wetted parts are NACE-compliant Hastelloy C276 and 316L
stainless steel. The welded body, which is manufactured fro 316L stainless
steel, provides environmental sealing to NEMA 4X. The transducer is
supplied in gauge and absolute ranges from 0 to 5 psi through 0 to 5,000
psi. It is certified explosion proof by CSA for Class 1, Division 1,
Groups B, C and D, Class II Groups E and F and Class III, Division 1.
(xxx–xxx.) Druck, Inc., New Fairfield, CT Simon Appleby 203-746-0400
Fax 203-746-2494
Pressure transducers resist corrosion
Two general-purpose pressure transducers, the flush-mount MP-40A and the
10-32 port-mount MP-50A, are of all welded, all titanium construction.
Both models are available in ranges from 50 to 5,000 psi. And both are
energized by 5 Vdc and produce 20-mV/V output. Typical applications
include test and measurement, production equipment and controls,
liquid-level sensing, and any corrosive-environment application where
titanium excels over stainless steel. Both transducers complement the
manufacturer's line of digital pressure indicators. (MP-40A, from $165;
MP-50A, $195–stock.) Texmate, Vista, CA Sales 619-598-9899 Fax
619-598-9828 995 Park Center Drive, 92083-8397
Pressure sensor approximates true point measurement
EPI-050 pressure sensors measure both static and dynamic pressure. The
silicon chip-sensing element measures only 0.05 in. (1.2 mm) in diameter,
so small that the sensor takes up to virtually no surface area and
approximates a true point measurement. Three standard mounting
configurations are available to measure pressure over several ranges, from
0 to 2 psi (0 to 0.13 bar) through 0 to 300 psi (0 to 20 bar) with outputs
as high as 125 mV and resonant frequencies to 1.7 MHz. The operating
temperatures range is -40 degrees to 250 degreesF (-40 degrees to 121
degreesC). A variety of barrel-shaped and threaded probes are available
with and without protective screens, as are custom options. Paddle-shaped
units as thin as 0.02 in. (0.5 mm) are available for surface mounting.
(xxx–xxx.) Entran Devices, Inc. Fairfield, NJ Information
201-227-1002 Fax 201-227-6865
Pressure transducer claims high reliability
The Eclipse pressure transducer uses a bonded semiconductor sensing
element rated for 100 million full-pressure cycles. The device provides an
amplified, 0.5 to 4.5-Vdc output from regulated repeatability are less
than (+/-)1% of full scale. Worst-case total error is guaranteed to be
less than (+/-)4% of full scale over a 0 degrees to 180 degreesF (-18
degrees to 82 degreesC) The Eclipse is in nine pressure ranges from 0 to
100 to 0 to 7,100 psia. ($49 ea/1,000–samples from stock.) Data
Instruments, Inc. Acton, MA Bill Hodges 508-264-9550 Fax 508-263-0630
Capacitive pressure sensor provides full system capabilities
The MPP-24 intelligent low-pressure sensor is available in 0 to 2 in. W.
C. and 0 to 15 psi pressure ranges. It contains a silicon capacitive
pressure sensor integrated with linear and digital CMOS circuitry and an
EEPROM, all in a single 1.2 x 0.7 x 0.9-in. package. The sensor can
withstand overpressures up to 150 psi. An on-board EEPROM allows the user
to program the span, resolution, and frequency of MPP-24 sensor to
specific application needs. Furthermore, calibration is programmed and
linearization is specified at the factory, and these coefficients are
stored in the EEPROM. Integrating the sensor with linear and digital CMOS
circuitry allows the sensor to communicate directly with a microprocessor
without additional circuitry. And the sensor's tri-state bus output makes
it easy to combine multiple sensors. The MPP-24 plugs into a standard
24-pin socket and has NIST traceable calibration. ($65 ea/1,000–stock.)
Monolithic Sensors, Inc. Rolling Meadows, IL Sales 708-437-8090 Fax
708-437-8144
Pressure transducer `smarts' ensures field interchangeability
NPS series smart pressure transducers consist of a micromachined silicon
piezoresistive pressure sensor and a digital signal processing (DSP) IC.
The sensors provide a compensated high-level output signal as well as 1%
interchangeable calibration over the range of -20 degrees to +85 degreesC.
According to the manufacturer, these are the first pressure transducers to
provide compensation of thermal errors and output calibration to assure
field interchangeability. NPS pressure transducers provide thermal accuracy
offset and full scale output of (+/-)1% max and linearity error of (+/-)0.
2% over the full -20 degrees to +85 degreesC operating temperature range.
NPS series transducers operate from a 5-Vdc power source, thereby
providing direct compatibility with digital systems. Integral signal
conditioning provides a high-level full-scale ratiometric output voltage
from 0.5 to 4.5 Vdc. Optional 7 to 36-Vdc operation is also available.
Initially the transducer will be available in the 0 to 15-psia range.
Additional pressure ranges from 0 to 1 through 0 to 100 psi will be
available shortly. (Less than $30 ea/1,000–stock to 4 weeks.) Lucas
NovaSensor, Fremont, CA Janusz Bryzek 510-490-9100 Fax 510-770-0645 EEM
FILE 5500
OPTICAL SENSORS
IR sensors provide dual sensing pattern
IRA-E100 infrared sensors provide a dual sensing pattern and include a
silicon optical filter to prevent rf interference. Sensitivity ranges from
1,150 V/W to 1,470 V/W and operating temperature from -25 degrees to +55
degreesC. Rise time is less than 25 ms. Power supply requirements are 3 to
15 Vdc. ($2 to $5 ea/1,000–stock to 8 weeks.) Murata Erie North America
Smyrna, GA Sales 800-831-9172 Photoelectric sensor
provides different operating modes
The TinyEye photoelectric sensor has a wide variety of unique
“quick-change” optical block lenses. This allows the sensor to be used in
any sensing mode–proximity, convergent, retroreflective, polarized
retroreflective, and fiber optic. A red or infrared light source/receiver
combination is included for use in the opposed sensing mode. Sensor
ranges are up to 18 in. for the proximity mode, 20 ft for the
retroreflective mode, and 25 ft for the through-beam mode. Response time
is 500 microsecond. Both npn and pnp sensor outputs are available.
($59–stock to 4 weeks.) Tri-Tronics Co., Inc. Tampa, FL Robert Warner
813-886-4000 Fax 813-531-3608 Laser-beam sensor
provides analog and digital outputs
The LA511 laser beam sensor has a sensing width of 15 mm and a sensing
range of 500 mm. Its repeatability is 10 microns. The minimum sensing
target is 0.1 mm Dia. The sensor provides a 1 to 5-V analog out single npn
transistor setpoint output. The sensor, and its accompany 1.7 W signal
source require 12 to 24 Vdc for operation. The LA11's Class I laser
complies with 21CFR 1040.10 and 1040.11 as well as with FDA regulations.
($1,260–stock.) SVNX Sensors/Ramco Electric Co. West Des Moines, IA
Mike Reelitz 515-225-6933 Fax 515-225-0063
Photoelectric sensor provides dual outputs
This miniature photoelectric sensor, the Q19 measures only 0.43 x 1.32 x.
74 in (11 x 34 x 19 mm). It has a sensing range from 2 to 80 in. (5 cm to
2 m). The sensor provides two outputs, one normally open and the other
normally closed. Each output is capable of up to a 150 mA continuous load.
Furthermore, one of these complementary outputs can be used as an alarm to
signal a controller or energize an external alarm whenever sensing conditions become marginal, alerting the operator in advance of sensor failure
due to an obscured lens or dirty sensing environment. Leds mounted on top
to the sensor allows the user to monitor conditions. Power on, output
overload, object sensed, and low gain. The Q19 comes with a 6 1/2-ft-long
attached PVC-covered four-wire cable or a miniature quick-disconnect and
requires 10 to 30 Vdc for operation. It is completely sealed and its
circuitry is epoxy-encapsulated. (xxx–xxx.) Banner Engineering, Inc.
Minneapolis, MN Floyd Schneider 612-544-3164
Photoelectric sensor detects targets of any color
Operating at distances up to 7 ft, the MR3-T sensor detects targets of
any color or material, including those difficult or impossible to detect
with conventional photoelectrics, such as clear glass and plastic, black
rubber, and multicolored packages. In addition to its long-range
capability, the MR3-T has a built-in, 0.1 to 5.0-s timer with
switch-selectable on-delay, off-delay or one-shot modes. The MR3-T's
detection versatility results from the manufacturer's beam
optical-triangulation technology. While conventional photoelectric sensors
respond to the intensity of a reflected light, the MR3-T responds to the
angle of light. This approach allows the MR3-T to ignore the factors that
affect reflectivity (color, texture, lens cleanliness, ambient light) and
can adversely influence the performance of conventional photoelectric
sensors. (xxx–xxx.) Aromat Corp., New Providence, NJ Sales 800-228-2350
PIN photodiode has broad spectral response
The S2506-04 PIN silicon photodiode has a spectral response of 400 to 1,
100 nm, peaking at 920 +/-50 nm. It has an effective sensitive area of 3 x
3 mm2 and comes in a clear plastic molded package. Radiant
sensitivity at 920 nm is 0.6 A/W and dark current is 0.2 nA with a maximum
of 10 nA. ($2 ea/large qty–stock.) Hamamatsu Corp., Bridgewater, NJ
Yuji Shinoda 908-231-0960 Fax 908-231-1218
Sensors differentiate between colors
SA1K series true-color mark sensors distinguish between various shades of
the same color as well as between differing hues. The sensors can
recognize one color or a precise combination of colors. Sensor programming
is accomplished simply by pressing a color-preset button to store the
reference target color in memory. The sensor features npn or pnp outputs
and adjustable response times. The output can be programmed to accept a
match or to reject a mismatch. The SA1K operates over a temperature range
from -10 degrees to 40 degreesC, and requires a 12-Vdc power source.
(xxx–xxx.) Idec Corp., Sunnyvale, CA Mike Suzuki 408-744-0550 Fax
408-744-9055
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