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High-Voltage Power Amplifier:
Thick Film Strain Gage Sensor DJ Force/Deflection Sensors from DJ Instruments are manufactured to specification by applying a strain gage transducer to a flat metal beam. Depending on the configuration and application, they can exhibit 5-50 kohm or less impedance and offer 4-8 mV/V output. The sensors can handle up to 100 V excitation, with a measurement range of 50 g at -60°C to 150°C, with 0.5% full scale per year longterm stability. They can be custom engineered in sizes of 0.25 in. W x 0.5 in. L (0.6 cm x 1.2 cm) and larger. Circle No. 62 on Reader Service Card.
Trek's Model 10/10 A is a high-voltage dc-stable power amplifier designed to provide control of output voltages from 0 to ±10 kV dc or peak ac with an output current range of 0 to ±10 mA dc or peak ac. It is configured as a non-inverting amplifier with a fixed gain of 1,000 V/V. The four-quadrant, active output stage sinks or sources current into reactive or resistive loads throughout the output voltage range to achieve accurate output response and high slew rates. Circle No. 68 on Reader Service Card. Chemiluminescence Measurement: The CL400 ChemiLume™ from Atlas Electric Devices evaluates materials' oxidative stability by measuring chemiluminescence, or light emission caused by thermal oxidation. An organic material heated in an oxygen-rich atmosphere emits a peak light signal due to formation and decay of electronically excited carbonyl groups. During this aging period, materials emit a detectable amount of light in relationship to the rate of thermal oxidation taking place. Analysis of the chemiluminescence process provides information about the material's resistance to thermal oxidation and the efficiencies and mode of action of stabilizers. Circle No. 71 on Reader Service Card.
Vapor Sorption Analyzer: The IGA002 from Hiden Analytical uses a gravimetric principle to measure the uptake of vapor adsorbates on porous materials. A vessel designed to UHV standards permits vacuum levels better than 10"4 torr at the sample position, and a pressure control system regulates vapor pressure accurately across eight decades of pressure measurement. Temperature stability is ±0.05°C. A rapid internal sample heating system rated to 350°C can be used to dry the sample prior to measurement. The kinetics of vapor sorption can be measured at each point on the isotherm and provide true equilibrium determination. Circle No. 63 on Reader Service Card.
Mid-Sized Microscope System: The Eclipse E600 system from Nikon uses the CFI60 chromatic aberration-free infinity optical system over the full 25-mm field of view. Coating technologies allow for clear, bright, and high-contrast images from 340-600 nm or more. The system can be used with techniques such as brightfield, darkfield, differential interference contrast, and fluorescence studies. With the sevenplace universal condenser, users can custom build the system to suit their needs. Circle No. 67 on Reader Service Card.
Magnetic Refrigerator: A magnetic refrigerator produced by the U.S.
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