Resistive Potentiometers (POT) (source: instructables.com), Depending upon the motion of wiper, potentiometer are of three types. The potentiometers are designed with a definite power rating which is dependent on its heat dissipating capacity. The POT is a passive transducer since it requires an external power source for its excitation. Infinite resolution film potentiometric transducers are based on a proprietary conductive film process featuring extremely low noise proportional full scale voltage output. Thermistor is a transducer. The potentiometer is also called as pots and it one of the most commonly used devise for measuring the displacement of the body. ANSWER: D. Both (a) and (b) Q3. Here the voltage Vs is applied across the two points of the wire A and B. linear as well as rotational. By combining a pressure transducer or vibrating wire sensor with one of the Campbell Scientific dataloggers you can create a rugged and flexible water level monitoring system. Limited voltage as well as current output options are also available. In other words, sensors are the devices which helps to sense the signal from an object or human. The potentiometer is also called as pots and it one of the most commonly used devise for measuring the displacement of the body. The output voltage (Vout) is measured as shown in the figure below. It reduces the life of this transducer. 1) Potentiometer resolution: Though the resistance of the conductor is proportional to its length, when the slider moves over the wire the change in the resistance is not continuous function of the contact movement. +39 030 9888 1 - Fax +39 030 9839063 - P. IVA 03032420170 LT With Shaft; PK Rodless; PY Touch Version; PC With Cylindrical Case; Position Sensor Magnetostrictives. It is easy to use and useful in many applications where requirements are not severe. The potentiometer is the electrical type of transducer or sensor and it is of resistive type because it works on the principle of change of resistance of the wire with its length. The output voltage is proportional to the distance travelled by the wiper. So, Sensitivity and linearity are two conflicting requirements in potentiometers. The potentiometer can be used for the measurement of translational as well as well rotational displacement. They are also applied in medical instrumentation as displacement transducers, and also used with resistive temperature transducers in medical applications. To measure the displacement of the body, this body, which is moving, is connected to the sliding element of the potentiometer. Potentiometers can be used as voltage dividers. Rectilinear Displacement Transducers. These sensors come in numerous housing options and can monitor pressure ranges as low as 0.07 mBar to 8000 Bar, with outstanding performance, including life and accuracy. Pressure B. Displacement C. Humidity D. Both (a) and (b) View Answer / Hide Answer. Explain that sensitivity and linearity are the two conflicting requirements in a resistive potentiometer transducer. C is the variable contact point between A and B and its position can be changed by the sliding contact. Complete board mount or heavy duty pressure measurement solutions; easily configurable with wide choice of ports, connectors, outputs, & pressure ranges. LT Rectilinear displacement transducer. The lower the length that can be recorded higher is the resolution of the potentiometer. Potentiometers are also very widely used as a part of displacement transducers because of the simplicity of construction and because they can give a large output signal. Here's What You Need to Know, 4 Most Common HVAC Issues & How to Fix Them, Commercial Applications & Electrical Projects, Fluid Mechanics & How it Relates to Mechanical Engineering, Hobbyist & DIY Electronic Devices & Circuits, Naval Architecture & Ship Design for Marine Engineers, Book: Mechanical Measurements by Thomas G. Beckwith and N. Lewis Buck. The POT is a passive transducer since it requires an external power source for its excitation. Hence sensitivity will decrease because lower input will result in lower output. In Translatory or linear potentiometer, wiper has linear motion only. This site uses Akismet to reduce spam. Therefore, a higher potentiometer resistance requires satisfying constant power dissipation. The best examples of this transducer are potentiometers like rotator & translation. The point C is the slider whose position is changed by the operator or by the motion of the body whose displacement is to be measured. Its temperature coefficient is A. 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