For fixed-point thermometer calibrations, the model 5943 Stainless Steel Gallium Cell achieves 29.7646C with uncertainty of just 0.00008C and reproducibility of 0.000025C. The gallium sample is sealed in a Teflon envelope that is then sealed in stainless steel, ensuring a life of 10 years or longer. Realization and maintenance of melting plateaus in the 5943 cell are automated through a system that automatically creates melt plateaus that last more than one week.
Hart Scientific, www.hartscientific.com
M2958 clock oscillators develop timing waveforms with frequencies from 10 to 410 MHz. The steep-edge timing signals have typical rise/fall times of 220 picosec, and 45/55 symmetry. Output frequency stability across the 0 to 70C temperature range is guaranteed to ±20 ppm. This assurance includes the effects of supply voltage and load variations. The oscillators are compatible with complementary PECL logic loads.
MF Electronics Corp., www.mfelectronics.com
No bigger than a credit card, a microprocessor core module line includes Ethernet interface and up to 1 Mbyte of flash or SRAM memory. The modules also allow the user to leverage 4 serial ports, battery-backable clock, cold-boot capability, a slave-mode operation, and up to 40 I/O lines. These systems can be enhanced with a development kit that adds a complete TCP/IP stack, a web server, and a C development environment to the package.
Rabbit Semiconductor, www.rabbitsemiconductor.com
The TC2000™ is a 0.18µ CMOS, single-chip Bluetooth system on a chip. It combines RF I/O circuits, analog, and digital functionality into a low-power, small-form factor package. A development kit is available to assist in the development of Bluetooth applications. Designers need only add a crystal, antenna, decoupling capacitors, a reference resistor, and a pc board.
Zeevo Inc., www.zeevo.com
A large-capacity, fire-rated poke through designed for communication cable, furniture-feed applications is UL and CSA certified. It is rated for 1-, 11/2-, and 2-hour floors. It will fit floor thicknesses of 2.25 to 7 inches. The flush cover has knockouts of 11/4 inch and 2 inches in the center to mount a conduit fitting if flexible conduit is used for transition to the furniture. A 3-inch core hole in the floor is required.
Hubbell Inc., www.hubbell-wiring.com
KV Series power supplies includes constant-voltage, constant-current units with automatic crossover. The units are supplied with up to 3A current across the voltage range. Output is 0 to 1,500V dc. Options include remote-voltage and current programming, and remote turn on and off.
Technology Dynamics Inc., www.mideastind.com
Metallized polyester surface-mount power supply capacitors produce reliability that is comparable to MIL-PFR-55514 and can withstand solder reflow temperatures to 260C. They can also operate at 125C without breakdown by the soldering process. They are available in Gull Wing style to enhance visual inspection, and the J style to optimize pc board space. The 100% encapsulation, which is non-delaminating, facilitates operational integrity and long service life.
Electronic Concepts Inc., www.eci-capacitors.com
Made of nickel-plated spring steel, this leaf connector is for snap-in mounting of 9V batteries directly to a pc board. The spring tension supplies low contact resistance and adjusts to any variation in battery length. The connector also provides a wiping action on contact, eliminating snap contact..
Keystone Electronics Corp., www.keyelco.com
Core and coil ballasts for the operation of high-intensity discharge (HID) lamps 600W and higher carry a UL Class N insulation temperature rating. This rating is 20C higher than previous models that meet Class H standards. This permits the design of smaller fixtures for high-wattage HID applications, and helps increase the ambient temperature ratings of existing fixtures.
Advance Transformer Co., www.advancetransformer.com
A DIN-rail mountable, optically isolated, electronic module is designed for use with incremental encoders. Isolation circuitry provides an electrically robust output to the receiving electronics. It is for systems with marginal signal compatibility or installations with noise or grounding problems.
BEI Sensors & Systems, Industrial Encoder Div., www.beiied.com
Featuring nickel cadmium, nickel metal hydride, lithium ion, sealed lead acid, and all primary chemistries, these custom battery packs can be piggy-backed onto pc boards with special brackets. Depending on the application, the packs can withstand up to 50,000g shock and high temperatures. Packaging can include plastic cases with snap-in installation. Units are priced according to configuration, chemistry, and quantity.
Generation Electronics, www.aved.com
Surface-mount, patch-antenna elements feature a frequency range of 1.5 to 2.4 GHz with an impedance of 50 ohm. The components are temperature-stable with a low return loss and low-frequency drift vs temperature. The antenna elements are suited for emerging telecom applications such as portable GPS receivers, navigation systems, wireless LAN, Bluetooth, and aviation, marine, and surveying equipment.
Spectrum Control Inc., www.spectrumcontrol.com