Transducer | Types of Transducer

Transducer Instrumentation is the heart of industrial applications. Instrumentation is the art and science of measuring and controlling different variables such as flow, level, temperature, angle, displacement etc. A basic instrumentation system consists of various devices. One of these various devices is a transducer. A transducer plays a very important role in any instrumentation system. … Read more

Polarization Index Test or PI Test

Polarization Index Test (PI Value Test) along with Insulation Resistance Test (IR Value Test) is conducted on HV electrical machine to determine service condition of the insulation. IP test is conducted especially to determine the dryness and cleanliness of the insulation. In insulation resistance test, a high DC voltage is applied across the insulator. This … Read more

Tan Delta Test | Loss Angle Test | Dissipation Factor Test

Principle of Tan Delta Test A pure insulator when is connected across line and earth, it behaves as a capacitor. In an ideal insulator, as the insulating material which acts as dielectric too, is 100 % pure, the electric current passing through the insulator, only have capacitive component. There is no resistive component of the … Read more

Piezoelectric Transducer

A transducer can be anything which converts one form of energy to another. Piezoelectric material is one kind of transducers. We squeeze this material or we apply force or pressure on this material it converts it into electric voltage and this voltage is function of the force or pressure applied to it. The material which … Read more

Linear Variable Differential Transformer LVDT

Definition of LVDT The term LVDT stands for the Linear Variable Differential Transformer. It is the most widely used inductive transducer that coverts the linear motion into the electrical signal. The output across secondary of this transformer is the differential thus it is called so. It is very accurate inductive transducer as compared to other … Read more

Temperature Transducers

Definition of Temperature Transducer A Temperature Transducer is a device that converts the thermal quantity into any physical quantity such as mechanical energy, pressure and electrical signals etc. E.g. In Thermocouple the electrical potential difference is produced due to temperature difference across its terminals. So, thermocouple is an temperature transducer. Main Features of Temperature Transducers … Read more

Inductive Transducers

Inductive transducers work on the principle of inductance change due to any appreciable change in the quantity to be measured i.e. measured. For example, LVDT, a kind of inductive transducers, measures displacement in terms of voltage difference between its two secondary voltages. Secondary voltages are nothing but the result of induction due to the flux … Read more

Oscillator Transducer

These types of transducers are mostly used as secondary transducers and their output is calibrated in terms of input quantity. It can be used to measure force, pressure, displacement etc. Oscillatory transducer consists of following parts Mechanical linkage Oscillator Frequency modulator Force summing member Mechanical linkage: This is used to link the input quantity to … Read more

Strain Gauge

A strain gauge is a resistor used to measure strain on an object. When an external force is applied on an object, due to which there is a deformation occurs in the shape of the object. This deformation in the shape is both compressive or tensile is called strain, and it is measured by the … Read more