Answer / rajendra mallick

Radar level sensor work with high frequency radar which are
guide along a probe,As the pulse impact the medium the
impedence changes and part of the emitted pulse is reflected
The time between pulse launcing and recieving is measured
and level calculated.
Ultrasonic level sensor works on sound wave principle,
direct sound wave brust on onto the surface of the material
whose level is to be measured, echos of these waves returns
to the transducer which perform the calulation to convert
the distance of wave travel.

Answer / rahul

Radar level measurement is measuring the time required for
the microwave
pulse and its reflected echo to make a complete return trip
between the non-contacting transducer and the
sensed material level. Then, the transceiver converts this
signal electrically into distance/level and
presents it as an analogue and/or digital signal. The
transducer’s output can be selected by the user to be
directly or inversely proportional to the span.Radar level
transmitters provide non contact type of level measurement
in case of liquids in a metal tank.They make use
ofelectromagnetic waves usually in the microwave X-band
range which is near about 10 GHz.
Ultrasonic level instruments operate on the basic principle
of using sound waves to determine liquid/
solid/slurries level.Ultrasonic Level Transmitters consist
of two elements; 1) a high efficiency transducer and, 2) an
associated electronic transceiver. Together, they operate
to determine the time for a transmitted ultrasonic
pulse and its reflected echo to make a complete return trip
between the non-contacting transducer and the
sensed material level.The frequency range for ultrasonic
methods is in the range of 15...200 kHz.

Answer / hirensinh_parmar

A

how we can calibrate an Interface level transmitter online

2 Answers   L&T,

---

how to calibrate a capillary type level transmitter for a closed tank in field? also what is the procedure for commissioning a capillary level transmitter for a closed tank?

2 Answers  

---

principle of dead weight tester ?

0 Answers  

---

How r the calculation of process line mpm.

0 Answers   Bhushan Power Steel,

---

How to interfacing microcontroller with a DC motor

0 Answers   JJ Tech,

---

why we use casced loop

6 Answers  

---

my data card only does run in my mobile so how can change it that it run other mobile & computer and i can stor data in my data card

0 Answers  

---

Which Signal hart communicator work? If there any signal change when hart connect while transmitter in line ?

0 Answers   KOC,

---

why we use the ac supply load cell>?can we use the dc supply load cell?advantages and disadvantage of the ac supply load cell?

0 Answers  

---

what are the sensor types of vibration&speed?n what is proximity sensor?

3 Answers  

---

IS there any effect of vortex in low pressure side of the transmiter after the orific in feed water line? if yes then what is the calculation?

0 Answers  

---

What are the interlocks we have to check during the start up of LP/HP compressor?

0 Answers   Hamsco,

---