Answer / sindhu

transducer is a device that converts a signal from one form to another.
like a lamp - converts electrical energy to light.
photo detectors etc....

Answer / mohd asif qureshi

A transducer is a device that converts one form of energy
to another. Energy types include (but are not limited to)
electrical, mechanical, electromagnetic (including light),
chemical, acoustic or thermal energy. While the term
transducer commonly implies the use of a sensor/detector,
any device which converts energy can be considered a
transducer. Transducers are widely used in measuring
instruments.
Electromagnetic:
Antenna – converts electromagnetic waves into electric
current and vice versa
Cathode ray tube (CRT) – converts electrical signals into
visual form
Fluorescent lamp, light bulb – converts electrical power
into visible light
Magnetic cartridge – converts motion into electrical form
Photodetector or photoresistor or light dependent resistor
(LDR) – converts changes in light levels into resistance
changes
Tape head – converts changing magnetic fields into
electrical form
Hall effect sensor – converts a magnetic field level into
electrical form only
Electrochemical:
pH probes
Electro-galvanic fuel cell
Hydrogen sensor
Electromechanical (electromechanical output devices are
generically called actuators):
Electroactive polymers
Galvanometer
Microelectromechanical systems
Rotary motor, linear motor
Vibration powered generator
Potentiometer when used for measuring position
Load cell – converts force to mV/V electrical signal using
strain gauge
Accelerometer
Strain gauge
String potentiometer
Air flow sensor
Tactile sensor
Electroacoustic:
Loudspeaker, earphone – converts electrical signals into
sound (amplified signal → magnetic field → motion → air
pressure)
Microphone – converts sound into an electrical signal (air
pressure → motion of conductor/coil → magnetic field →
signal)
Pickup (music technology) – converts motion of metal
strings into an electrical signal (magnetism → electricity
(signal))
Tactile transducer – converts electrical signal into
vibration ( signal → vibration)
Piezoelectric crystal – converts solid-state electrical
modulations into an electrical signal (vibration →
electrical current → signal)
Geophone – converts a ground movement (displacement) into
voltage (vibrations → motion of conductor/coil → magnetic
field → signal)
Gramophone pickup – (air pressure → motion → magnetic field
→ signal)
Hydrophone – converts changes in water pressure into an
electrical form
Sonar transponder (water pressure → motion of
conductor/coil → magnetic field → signal)
Photoelectric:
Laser diode, light-emitting diode – converts electrical
power into forms of light
Photodiode, photoresistor, phototransistor, photomultiplier
tube – converts changing light levels into electrical form
Electrostatic:
Electrometer
Thermoelectric:
Resistance temperature detector (RTD)
Thermocouple
Peltier cooler
Thermistor (includes PTC resistor and NTC resistor)
Radioacoustic:
Geiger–Müller tube – used for measuring radioactivity
Receiver (radio)

Answer / mohd asif

Transducer, in general, is a device which converts non electrical quantity into electrical quantity.

Answer / syed azam hussain

Transducers
[<Lat. Trans, across + ducere, to lead]
Devices to transform signals between different physical
domains.
Taxonomy
Active: input signal modulates output energy; e.g.
liquid crystal display.
Passive: input signal transformed to output energy;
Bidirectional, e.g. motor/generator;
Unidirectional, e.g. photodiode

WHAT IS TSI? HOW ITS WORK

2 Answers  

---

why do we use 4-20mA as o/p and why don't use 0-20mA or 5- 21mA?

3 Answers  

---

what is difference between total flow and flow rate in general ?? explain it with daily life example.

3 Answers   GNFC,

---

Please can anybody tell me the step by step procedure for calibrating the Pr,Lvl,Fl,Temp transmitter on process?

1 Answers  

---

What is ALSPA 370 control system

1 Answers   DUBAL-Dubai Aluminium,

---

---

why we use 3 wire rtd direct wiring for temperature measurement instead of temperature transmitter like bearing temperature

0 Answers   ABG Energy,

---

what is ABB DCS SYSTEM?

2 Answers   OMV,

---

What is an analog input-output

10 Answers   TN, Torrent Pharma,

---

3. Differentiate between ultrasonic flowmeter and radar type flow meter.

0 Answers  

---

I was working on calibrating turbidity transmitters endress+hauser at effluent polishing plant.We calibrated using NTU buffers.What happened is that when we immersed the sensor, everytime we raise and lower the sensor gradually, the reading will vary.my question is that is there any specifications on what is the required distance from the bottom of the container with buffer to the face of the sensor?Is it ok to install the sensor in a medium which has turbulence specially if bubbles are present?

0 Answers  

---

what is zenier barier and what means zone 1,zone 2,and zone 3

2 Answers   Bapco Bahrain Petroleum Company,

---

What is feed factor and its Importance in cement industry? How we can solve feed factor?.

0 Answers  

---