When two dissimilar metals are joined together at two points to form a closed loop and a temperature difference exists between the junctions, an electrical potential is set up between the junctions. Such an arrangement is known as thermocouple and is frequently used for the measurement of temperature. Measurement of temperature by a thermocouple is an important application of the [...]
Thermometric well is used to measure the temperature of gas flowing through a pipeline. A small tube called thermometric well is welded radially into the pipeline. The well is partially filled with some liquid and the thermometer is immersed into this liquid. When the temperature of the gas flowing through the pipeline is higher than the ambient temperature, the heat [...]
The following are the characteristics of strain rings: i. Strain-rings provide high ratio of sensitivity to stiffness at the same time having adequate stability against buckling. ii. A ring can be easily produced and is simple to mount. iii. The fact that the inside is always in an opposite state of strain from the outside, allows four active arms to [...]
In this article we will discuss about the connection of an ammeter for measuring heavy current. When the line current is high, total current of the supply line cannot be sent through the coil of the ammeter. For carrying high current, the cross-section of the coil must be large, and it becomes very difficult to make coil of a conductor [...]
In this article we will discuss about the disadvantages of ampere-hour meters. Ampere-hour meter actually measures electrical energy in ampere-hour. It is equal to current in ampere flowing through the current coil of the meter multiplied by the time in hour during which the current flows. But as the B.O.T. unit of electrical energy is kilowatt-hour, the scale of the [...]