A differential resistance thermometer for biological use1
نویسندگان
چکیده
منابع مشابه
An A - C Resistance Thermometer Bridge
r '-' A 400 Hz bridge des igned spec ifically fo r measurin g the res istances of platinum the rmometers is desc ribed. Wh en used in conjunction with a co nvent ional 25 ohm thermometer, the instrument ca n resolve a resistance change of 2 micro-ohm s or less, or about 20 microdegrees. It is believed to be in error by no more tha n 3 micro-ohms throughout the useful temperature ra nge of a con...
متن کاملResistance Thermometer Theory and Practice
1. BASIC THEORY The electrical conductivity of a metal depends on the movement of electrons through its crystal lattice. Due to thermal excitation, the electrical resistance of a conductor varies according to its temperature and this forms the basic principals of resistance thermometry. The effect is most commonly exhibited as an increase in resistance with increasing temperature, a positive te...
متن کاملContinuous-Culture Apparatus for Long-Term Use1
The continuous production and harvest of uncontaminated cells for periods of several months are a major requirement inthe design of a suitable culture system. Many continuous-culture units have been reported previously (1, 2), and some units are now commercially available. However, in these units, rubber, metals, and other sources of potentially toxic extractives are not prevented from direct c...
متن کاملLDMOS Channel Thermometer Based on a Thermal Resistance Sensor for Balancing Temperature in Monolithic Power ICs
This paper presents a method of thermal balancing for monolithic power integrated circuits (ICs). An on-chip temperature monitoring sensor that consists of a poly resistor strip in each of multiple parallel MOSFET banks is developed. A temperature-to-frequency converter (TFC) is proposed to quantize on-chip temperature. A pulse-width-modulation (PWM) methodology is developed to balance the chan...
متن کاملA thermistor leaf thermometer.
An instrument is described which allows measurements of leaf temperature within about 0.3 C. It consists of a special thermistor probe, a small circuit box, and a standard ammeter. The circuit box can easily be fixed to the meter and contains a battery, which passes 0.3 milliampere through the thermistor, and also contains an integrated circuit amplifier, so that the meter reads 20 C full scale...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1931
ISSN: 0306-3283
DOI: 10.1042/bj0251213