Category: Transducers

Beta Gauge Thickness Measurement

Beta Gauge Thickness Measurement: Beta Gauge Thickness Measurement – A common and characteristic feature of a radioactive element is that they disintegrate spontaneously to produce fresh radioactive elements called daughter elements. This activity of parent elements is termed as radioactivity.. During this disintegration, high energy radiations are emitted from the nuclear of the radioactive element. […]

Turbine Flow meter Principle

Turbine Flow meter Principle: The Turbine Flow meter Principle is used for the measurement of liquid gas and gases of very low flow rate. It works on the principle of turbine. It consists of a multibladed rotor (called turbine wheel) which is mounted 90° to the axis of the flowing liquid as shown in Fig. […]

Magnetic Flow Meter Construction

Magnetic Flow Meter Construction: Magnetic Flow Meter Construction are the first type of flowmeters to be considered for high corrosive applications and for applications involving measurement of erosive slurries. These meters work on the principle of Faraday’s law of electromagnetic induction, which states that whenever a conductor moves through a magnetic field of given field […]

Mechanical Transducer Definition

Mechanical Transducer Definition: Mechanical Transducer Definition – The measurement of flow rate and quantity is the oldest of all measurements of process variables in the field of instrumentation. It is used to determine the amount of materials flowing in or out of a process. Without flow measurements, plant material balancing, quality control and the operation […]

Ultrasonic Temperature Transducer

Ultrasonic Temperature Transducer: Ultrasonic Temperature Transducer (sound vibrations above 20 kHz) are useful when we are concerned with rapid temperature fluctuations, temperature extremes, limited access, nuclear or other severe environmental requirements and measurement of temperature distribution inside solid bodies. They may be used to measure the distribution of parameters other than temperature (example flow). Ultrasonics […]

Optical Pyrometer Working

Optical Pyrometer Working: Optical Pyrometer Working – Any metallic surface when heated emits radiation of different wavelengths which are not visible at low temperature but at about 550 °C, radiations in shorter wavelength are visible to eye and from the colour approximate temperature is measured. The approximate values of temperature for colour (colour scale) is […]

Pyrometer Working Principle

Pyrometer Working Principle: When temperature being measured is very high and physical contact with the medium to be measured is impossible or impractical, optical pyrometer based on the principle of thermal radiation are used. These Types of Pyrometer Working Principle are used under condition where corrosive vapours or liquids would destroy thermocouples, resistance thermometer and […]

IC Temperature Sensor LM335

IC Temperature Sensor LM335: IC Temperature Sensor LM335 produces a voltage or current signal that increases with increase in temperature. It eliminate the linearity errors associated with thermistor. However, being semiconductor devices, they are available in both voltage and current output configuration.  Figure 13.51 shows a National semiconductor IC Temperature Sensor LM335. It provides a […]

Semiconductor Diode Temperature Sensor

Semiconductor Diode Temperature Sensor: Semiconductor Diode Temperature Sensor is a versatile device and finds use in many applications. Two of its parameter, that is forward voltage drop (Vf) and reverse saturation current (Is) are temperature sensitive. The sensitivity of Is with temperature is non-linear, but Vf has a linear temperature coefficient over a wide temperature range. Hence, Vf can […]

Thermocouple Circuit

Thermocouple Circuit: Thermocouple Circuit – One of the most commonly used methods of measurement of moderately high temperature is the thermocouple effect. When a pair of wires made up of different metals is joined together at one end, a temperature difference between the two ends of the wire produces a voltage between the two wires […]