RF techniques - Application of dc potentiometer insertion loss test set to mm wavelengths
Thermistor mount for dc potentiometer insertion loss test set
TEST EQUIPMENT↗
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Temperature Stabilization Requirements for Unchopped Thermal Detectors
The temperature stabilization requirements of unchopped thermistor bolometers and thermopile detectors are analyzed.
thermistor↗
Temperature-compensation circuit stabilizes performance of vidicons
A simple transistor circuit uses a thermistor to change the vidicon target potential in relation to temperature differences.
Source record↗
Electronic device simulates respiration rate and depth
An oscillator circuit and a thermistor, in close proximity to a light bulb, periodically alter the heat output of the bulb by varying the voltage across its filament. Use of this simulator permits checkout tests on pneumographs.
Thomas, J. A.↗
Miniature bioelectric device accurately measures and telemeters temperature
Miniature micropower solid-state circuit measures and telemeters the body temperature of laboratory animals over periods up to two years. The circuit employs a thermistor as a temperature sensing element and an fm transmitter. It is constructed from conventional discrete components or integrated circuits.
Fryer, T. B.↗
Solid state thermostat has integral probe and circuitry
Compact, reliable thermostat provides a temperature readout signal and a continuous temperature-control output for temperature monitoring by automatic checkout equipment or telemetry systems. It employs a solid state circuit in a housing rigidly attached to a thermistor probe.
Source record↗
Remote and in situ temperature measurements of land and water surfaces.
Temperature measurements of grassland, desert and water surfaces using IR radiometer found to compare favorably with miniature thermistors
INFRARED INSTRUMENT↗
Electronic circuit provides automatic level control for liquid nitrogen traps
Electronic circuit, based on the principle of increased thermistor resistance corresponding to decreases in temperature provides an automatic level control for liquid nitrogen cold traps. The electronically controlled apparatus is practically service-free, requiring only occasional reliability checks.
Turvy, R. R.↗
Errors of radiosonde and rocketsonde temperature sensors.
Error computation in radiosonde and rocketsonde atmospheric temperature sensors by using thermistors of different emissivities
Daniels, G. E.↗
Heat-transfer telemetry from free-flight models in wind tunnels. I.
Heat transfer telemetry from free flight models in hypersonic wind tunnels, using miniature FM transmitter with thin film thermistor sensor
Harrison, R. G.↗
Radiometric temperature reference
Radiometric Temperature Reference uses a thermistor as both a heating and sensing element to maintain its resistance at a preselected level to continuously control the power supplying it. The fixed infrared radiation level must be simple, rugged, and capable of high temperature operation.
Monford, L. G., Jr.↗
Precision insertion-loss calibrations at 90 GHz.
Dual channel waveguide insertion loss test set for calibrations at 90 GHz in radio astronomy and communication systems, using sprayed thermistor mount
Oltmans, D. A.↗
A conceptual current surge protector for incandescent lamps
Negative-temperature coefficient device /thermistor/ in series with a lamp filament alleviates high filament surge current during initial application of power. The thermistor should be selected for a cold resistance approximately equal to one fourth of the normal hot resistance of the filaments to be protected.
Macomber, G. A.↗
Generation of uncertainty boundary for ARCASONDE 1A temperature sensor system Progress report
Computation of error bars for temperature profiles from thermistor type meteorological rocksonde
Kikkawa, S.↗
Polarographic carbon dioxide transducer amplifier
Electronic amplifier contains matched pair of metal oxide semiconductor field effect transistor devices which have high input impedance and long-term stability. Thermistor in feedback loop provides temperature compensation for large drifts in the sensor.
Stillman, G.↗
Sensitive gaseous hydrogen detection system
System utilizing new type hydrogen sensor has overall detection sensitivity and response speed higher than conventional hot-wire or hot-thermistor detectors. System measures concentrations of from 2 parts per million to 30 percent and is adaptable as leak detector and hazard alarm wherever hydrogen is used.
Macintyre, J. R.↗
Simple gas chromatographic system for analysis of microbial respiratory gases
Dual column ambient temperature system, consisting of pair of capillary columns, microbead thermistor detector and micro gas-sampling valve, is used in remote life-detection equipment for space experiments. Performance outweighs advantage gained by utilizing single-column systems to reduce weight, conserve carrier gas and operate at lower power levels.
Carle, G. C.↗
Temperature compensation of light-emitting diodes
Circuit which includes a thermistor-resistor combination to compensate for temperature fluctuations by supplying input voltage to light-emitting diode, maintains constant light output. Similar circuits can be used for temperature-induced variations in photodiode applications.
Deboo, G. J.↗