What is a Sensor? Different Types of Sensors, Applications

[@realpars]

Want to learn about industrial automation? Go here: www.realpars.com/individual-pricing Want to train your team in industrial automation? Go here: www.realpars.com/pricing-team

[@jeddestrera3515]

Good day RealPars, this is a good video. But i found the topic Active and Passive sensors confusing. I learned that Active sensors require external supply to operate and passive sensors don't. and another thing, RTD primarily give output in a change in Resistance not voltage. may you find this comment constructive. Thank you

[@sachinsrinivasan9822]

Yes I also felt same as you said. Active sensor requires external power supply . Passive sensor doesn't require external power supply. Please verify it.

[@alpha-sh8uo]

What I heard before is that active component can control electron flow where as passive components can’t. Without power supply the active sensor, I believe, can create potential difference. In contrast, passive sensors only control p.d through the manipulation of resistance.

[@betsegayosef98]

me also confused ....on measurement and instrumentation book ....it says active sensor require external power for their operation and passive don't! please correct it!

[@RightToWright]

Active sensor doesn't need external power and RTD gives change in resistance yes but after calibration of 4-20 ma or 24 DC (Transmitter)

[@lord_kaitu]

Good job, but active rather needs an external source not passive

[@normchristopherson5799]

I am in the controls industry. This video has reversed "active" and "passive".

[@countdown3524]

Exactly they misorder the types

[@sageautomation7861]

Very well and simply explained about sensors and types of sensors with the diagrams. A sensor is a device that helps to make advancements in electronic quantities physical quantities and other quantities. It shall result in making progress by affirming yield. In Industrial Automation, There are four types of sensors. Temperature sensor, MEMS sensor, Pressure sensor, and Torque sensor. Keep doing such videos.

[@kaizoku47]

the best youtube channel that really made me interested in industrial field even more ♥ thanks realpars

[@realpars]

Hi Mouadh, Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us. Happy learning!

[@johncully1944]

please clarify, i believe passive dont need external power supply and active do?or am i wrong

[@realpars]

The use of the terms passive and active get a little muddled because the terms originated as a description of electrical components. Sensors and transmitters are more complex devices and the terms lose clarity. So in terms of electrical components (op amps, transistors, LED's, etc.) you are absolutely correct. For sensors, transmitters, etc, it is most important to realize that some devices, like thermocouples, do not require external power at the sensor, but do require power at the transmitter or PLC card to provide data. Other sensors, like Coriolis mass flow meters, require power at the sensor and at the transmitter. So you can see how the concept of active and passive are not crystal clear for complex devices.

[@sachinsrinivasan9822]

You are right. Active sensor requires external power supply. Passive sensor doesn't require external power supply.

[@4.0Solutions]

We love sensors. Would you please do a video on wireless sensors for Industry 4.0? =]

[@realpars]

Thanks for sharing your suggestion with us, I will happily add that to the list. Happy learning!

[@mbzone8855]

Sir can you explain PNP OR NPN sensor

[@juliocesardealmeida2167]

I think it will be very interesting!

[@realpars]

Hi Mandeep, Thanks for sharing your suggestion with us! I have sent this over to our course developers. Happy learning!

[@alikhanzulkashov4438]

Dear RealPars, this is another awesome video, I would like to ask if it is possible to make a video on how to connect analog input and output devices to AI and AO modules of S7-1200, modules like 6ES7 231-4HD32-0XB0, 6ES7 231-4HF32-0XB0, 6ES7 231-5ND32-0XB0 for analog input and 6ES7 232-4HB32-0XB0, 6ES7 232-4HD32-0XB0 for analog output, showing how to connect in case of current signal transmission and voltage signal transmission loops. These are so confusing, in addition, couldn't find it on the internet. Hope it will get so many likes to put it on the top. Thanks in advance!

[@realpars]

Hi Alikhan! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@BelajarOtomasi]

Does anyone know, what software is used to make the simulation in this video?

[@realpars]

Hi Belajar, Thanks for your comment! I am not sure about this as this is done by our Graphic and Animation department.

[@hamzamohamed7935]

Keep making knowledge more fun and understandable, therefore the world will be better... Your fan from sudan, Africa 🇵🇸✌️✌️

[@realpars]

Thanks for your support, Hamza! Happy learning!

[@IK-qu9hw]

Sir This is perfect definition of active & passive sensor . In last video u said incorrect.

[@realpars]

Hi there, Thanks for your feedback! We noticed the mistake, our apologies!

[@IK-qu9hw]

@@realpars sir plz make more such videos mostly related to plc.

[@gilstruyf8400]

Thanks for this comment! I was checking this video the evening before my "sensor' exam. Without your comment I maby lost some points. Thanks for the save my dude ;)

[@jhonjairoaguirrepechene35]

hello, excellent video. Is there a possibility that your videos have Spanish subtitles? It would be very good to see in Spanish, since you explain very well. thank you.

[@realpars]

Hi Jhon, Thanks for your comment! We currently only provide our course videos in English, you are always able to turn on the English subtitles as that might make it a bit easier for you. Our apologies for any inconvenience! Happy learning!

[@aliusef2912]

Amazing video, But aren't Active & Passive terms the other way around ...? I think its Active sensors // sensors that need an external power source to operate passive sensors // sensors that doesn't need an external power source

[@realpars]

Thank you for reaching out with your question. In our video, we discussed the concept of active sensors, which operate without the need for external power. Think of them like a Thermocouple, which generates its own power through the heating of two metal types fused together. This generated power is then utilized by a PLC or similar controller according to its programmed functions. Here's the link to our video for further clarification: kzbin.info/www/bejne/banIo5ynhbasnrM Conversely, passive devices like the RTD require an external voltage source to function. They operate based on resistance changes when subjected to heat, affecting the voltage sent back to the sensor controller. It's essential to distinguish between "Power" in the context of the device and its function. An active sensor, for instance, won't generate electricity or EMF unless stimulated by a source like heat. This stimulation allows it to generate the power necessary for its operation, which is then measured by the PLC. Without this external source of heat, the active sensor remains inactive. For more detailed guidance on using and connecting these sensors, you can refer to this tech book link: [www.iqsdirectory.com/articles/thermocouple/rtd-sensors.html#:~:text=RTDs%20require%20a%20power%20supply,and%20are%20unaffected%20by%20heat](kzbin.info?event=comments&redir_token=QUFFLUhqbjY3d3JEY1c5LVB0WTJlODVyNUU3NFU5aUE0d3xBQ3Jtc0ttdkpJMFVfM3hNdTVuWVVzYkFwZ3FqYTF3SHlDTHdOVTJVZ0ZrSE1CalF1QVhxQTBlZFItMTgydExJdXUtVHU5RDdxb0thTUpmaHJYWm1mSmJ5NnIyWVJwQXZNaWdWRW5PVU96bXBCRmJNRjJGcnlPMA&q=https%3A%2F%2Fwww.iqsdirectory.com%2Farticles%2Fthermocouple%2Frtd-sensors.html%23%3A%7E%3Atext%3DRTDs%2520require%2520a%2520power%2520supply%2Cand%2520are%2520unaffected%2520by%2520heat) I hope this provides clarity and answers your query effectively. If you have any further questions, please feel free to ask.

[@nsjx]

Thank you. Would have appreciated more depth on the "sensor" topic. The title is - way - too general ;)

[@realpars]

Thanks for your feedback! We truly appreciate that, and I will happily forward that to our course developers.

[@nsjx]

RealPars Thanks. I work as a resident site engineer for a company here in Europe. I don't program per se, but I deal with breakdowns. Would appreciate more coverage of the position types and even the scanner readers of various models, when time allows 👍

[@zaidoonraheem2548]

Hello, is there a book or certified source that talks about frequency sensor and instruments

[@Tobioluwole]

From what i've read online an active sensor is meant to be the one requiring an external power source whilst the passive sensor is the opposite but in this video it says other wise. Please explain?

[@realpars]

The use of the terms passive and active get a little muddled because the terms originated as a description of electrical components. Sensors and transmitters are more complex devices and the terms lose clarity. So in terms of electrical components (op amps, transistors, LED's, etc.) you are absolutely correct. For sensors, transmitters, etc, it is most important to realize that some devices, like thermocouples, do not require external power at the sensor, but do require power at the transmitter or PLC card to provide data. Other sensors, like Coriolis mass flow meters, require power at the sensor and at the transmitter. So you can see how the concept of active and passive are not crystal clear for complex devices.

[@carlanthem]

Love this videos😍 I wish my classes were like this🙈

[@harshaajith2248]

how can we make this type of animation videos, which software ...could you please tell me

[@realpars]

Hi Harsha, Thanks for your comment! I am not sure about this as this is done by our graphic and animation department.

[@NihongoManabimashou]

Level sensor, pressure sensor, flow sensor, temperature sensor, speed sensor, position sensor.

[@adityalohar5965]

Hi, I am doing a project in which I need a sensor to detect the running "Ambulance" on road. The sensor is required to provide the information whether the ambulance is coming at Chowk (Junction or cross over of roads), or not. Then, which sensor should I use?

[@ghirmayokubay9293]

I think there is a mistake here. you said an active sensor doesn`t need external power. i think it is passive sensor that doesn`t need an external power. I see in my lecture notes the opposite to what you said. apart from that, a very good video from you and we appreciate that.

[@realpars]

Thank you for reaching out with your question. In our video, we discussed the concept of active sensors, which operate without the need for external power. Think of them like a Thermocouple, which generates its own power through the heating of two metal types fused together. This generated power is then utilized by a PLC or similar controller according to its programmed functions. Here's the link to our video for further clarification: kzbin.info/www/bejne/banIo5ynhbasnrM Conversely, passive devices like the RTD require an external voltage source to function. They operate based on resistance changes when subjected to heat, affecting the voltage sent back to the sensor controller. It's essential to distinguish between "Power" in the context of the device and its function. An active sensor, for instance, won't generate electricity or EMF unless stimulated by a source like heat. This stimulation allows it to generate the power necessary for its operation, which is then measured by the PLC. Without this external source of heat, the active sensor remains inactive. For more detailed guidance on using and connecting these sensors, you can refer to this tech book link: www.iqsdirectory.com/articles/thermocouple/rtd-sensors.html#:~:text=RTDs%20require%20a%20power%20supply,and%20are%20unaffected%20by%20heat I hope this provides clarity and answers your query effectively. If you have any further questions, please feel free to ask.

[@ignaciojavierkairuzeguia599]

Loved it

[@realpars]

Great!

[@GabrielTheExplorer254]

But how do sensors work? Seriously, how does it detect motion, temperature, sound ect and how does that send a voltage to a transmitter? Are the sensors generating their own voltage output thru the thermal heat , motion, sound, (I'm assuming thermal to electricity is passive and external is battery and other power supplies?) or are they connected to a battery or AC / DC power? Maybe these are stupid questions, but I'm sort of learning from scratch here on youtube about how electricity is generated , AC/DC, how diodes work, 3 phase generators, transformers, transistors ect. Sensors seem like a huge part of this general field that would be very useful to understand. Thanks

[@realpars]

There are many types of sensors. The actual measurement is detected by a circuit that is able to convert a physical property, like pressure or resistance, into a useful signal (like 4-20ma). Most sensors require a circuit to do this conversion, whether it is a transmitter local to the sensing element, or a PLC card installed in a cabinet. These circuits are generally powered by an external current source, like a power supply. Each type of sensor uses some physical or chemical property of the fluid or substance to convert into a meaningful value. For temperature, an RTD detects the change of resistance of the RTD with temperature and "looks up" the temperature corresponding to the measured resistance. For pH, a chemical reaction occurs at the measurement probe which creates an electrical signal which corresponds to the pH value. A pressure sensor can use deformations in a piezoelectric crystal to sense changes in pressure. The deformations change the electrical property of the crystal, which is proportional to pressure.

[@JonicheladrianBalingit]

All of your ideal' sharing are much more appreciated' and very impressive SIR. Thank you.😊

[@realpars]

We appreciate that!

[@raymunddevela6695]

based on my research, active sensor does not require external source to operate while passive sensor does not.

[@realpars]

Hi raymund. Thanks for your input. The terms active and passive are indeed quite confusing. For example, in this video we say that an RTD is passive as it needs an external source while a thermocouple is active because it does not require an external source. Devices such as proximity sensors have been categorized as active and passive as well. A passive 2-wire proximity sensor requires no external source to produce an output while a 3-wire active proximity sensor does not.

[@clarakoussaifi203]

very helpful ! thank u !

[@realpars]

Glad it was helpful, Clara!

[@moments8333]

It's very useful, thank u....

[@realpars]

You're very welcome!

[@rezaiguiaantar3444]

So sensors need always transmettres!

[@andersonsardinha1504]

On this course, will you provide the software ?

[@realpars]

Hi Anderson, Thanks for your comment, and I am happy to help you out! To answer your question, our subscription packages do not include the simulator software. We do provide the option to purchase a variety of hardware and software on our MarketPlace. marketplace.realpars.com/ Hope this helps! If you have any questions or concerns, please do not hesitate to contact us at any time.

[@Lokeshgowda2023]

😂😂😂🎉🎉🎉🎉

[@bakytbekizgaliyev9850]

Hi sir could you please make a video about basics of HVAC System?

[@realpars]

Thanks for the topic suggestion, I will definitely go ahead and forward this to our creator team. Happy learning!

[@FeejoyTechnology]

nice video！

[@realpars]

Thank you!

[@swapnilshinde7674]

Sir, Can you make video for how the plc is used in other criteria and applications. How working memory, data memory, are used??

[@rain0aldwaib]

check their website there is a free video about types of memories and how are they used

[@swapnilshinde7674]

@@rain0aldwaib thank you!!

[@kanchananaik2953]

💯💯💯💯💯

[@phuciendj1572]

😛😛😛😛😍

[@md.aliakbar5646]

It's very amazing for me!!! Thanks a lot.

[@realpars]

You're welcome!

[@juliocesardealmeida2167]

Fantastic! I enjoyed a lot these small video about sensors. Congratulations!

[@realpars]

Great to hear that, Julio! Thanks for sharing.

[@Moneymallenclosure]

Good effort, nice and informative content Keep up the good work💪

[@realpars]

Thank you!

[@farzadfani4688]

Hi,thanks for your great traning video. Please make a video about working with"Hand held comunicator Hart model 375 or 475" for loop check and calibration Thank you

[@realpars]

Hi Farzad, Thanks for your continuous support, we truly appreciate that! Happy to receive your topic suggestion, I will definitely go ahead and forward this to our creator team. Happy learning!

[@hemavardhan1703]

👍

[@sagarmore4968]

Thank you

[@realpars]

You're very welcome!

[@ermalx.berisha2154]

Another great clip illustrated with great examples. Thank you so much!

[@realpars]

Amazing to hear that, thanks for sharing!

[@chaitanyavenkatesh101]

Qq

[@chaitanyavenkatesh101]

Qqqq

[@chaitanyavenkatesh101]

W

[@kevinwikram1245]

thank you

[@realpars]

You're very welcome!

[@MohammedHussain-cc5hl]

Thanks RealPars👍

[@realpars]

You're very welcome, Mohammed!

[@stevenlee5755]

Good video!

[@realpars]

Thank you, Steven!

[@Ryarios]

One thing a lot of I&C people don’t think about is the fact that control systems do not sense directly. For instance, they don’t sense temperature directly. They rely on testing they rely on testing the state of the sensor which has a reaction to whatever it is they are supposed to be sensing. In the case of a TC, the sensor creates a tiny voltage because of the physics of how two dissimilar metals behave to temperature. The control system doesn’t sense temperature, it tests the voltage to determine its value and infers temperature from that. So what does this mean? Control systems can be spoofed outside forces that were not accounted for. For instance, electrical noise can be injected from outside the temperature loop that causes the control system to misinterpret the temperature. So if you are having trouble controlling the temperature of a system, and can’t figure out the issue because each component seems to work fine on its own, then the problem must be because the system is being spoofed by something impacting on the sensor electronics or its signal. These problems can be anywhere from very easy to figure out to extremely difficult to figure out and fix.