Capacitive Proximity Sensors Applications

[@likhithareddy927]

U showed it very clear....easy to understand

[@rmhutchins7]

I enjoyed your video. It was very helpful. Thank you!

[@pewpewpops]

Awesome video and I love that you showed some ideas for use:) I thought capacitive sensor’s could not sense metal? Let me know please and thank you so much for the video!

[@DorianMcIntire]

Capacitive sensor can sense most materials, including metal. They cannot sense objects through metal however.

[@BlaBlaBla-ry8sz]

@@DorianMcIntire but can u show how to measure it in the code? i cant figure out how to measure it:(

[@MARUTI96]

sir can I detect sand in a water(a container filled with full of water and some sand is put in it), please tell can I sense the sand level in the water

[@DorianMcIntire]

You can always experiment but I suspect it will not work since water has a high dielectric constant and sand does not.

[@MARUTI96]

@@DorianMcIntire ok thanks for replying

[@Brutishh]

The video was not nice its awesome..amazing and its appliction got understood completely

[@DorianMcIntire]

Glad you learned from the video.

[@DorianMcIntire]

Thanks.

[@awesomekevin3677]

Hi your video was great , I want to know can this sensor individually differentiate between the objects with different outputs when once set? Please reply soon.

[@DorianMcIntire]

Unfortunately this sensor cannot since it is strictly digital and can only detect whether and object is present or absent. The sensor uses the dielectric properties of materials for detection.

[@pbsalyid5323]

Brilliant!! Thanks for sharing

[@ashutoshsrivastava6772]

A really good demonstration. I wonder if this could be used to detect PET bottles only by adjusting range or something? How can sensitivity be changed?

[@DorianMcIntire]

+ashutosh srivastava The capacitive sensor can sense virtually anything. Are you talking about sensing glass bottles? If so the sensor can sense them up to a centimeter away if adjusted properly.

[@ashutoshsrivastava6772]

+Dorian McIntire glad to receive response from you. I want this sensor to sense the PET bottle used as drinking water package and reject any other material apart from this. like one used in reverse vending machine. i wonder if dielectric constant parameter could be used for this purpose. please guide.

[@ashutoshsrivastava6772]

+Dorian McIntire I've few queries regarding this. i request you to have an email conversation on this. here's my email address. [e-mail]

[@johnmarcuevas4710]

Hi sir, I just want to ask if how can I use the proximity sensor , in am/fm radi, because we have a project that if the sensor detects 3m away a person the radio will work. Thank you for your reply!

[@lavanyamr2769]

Sir, thanks for demonstration. I wanted which model of capacitive sensor is used here & how do I get differentiate between glass/ plastic/ paper/ wood by these

[@DorianMcIntire]

The model number is LJC30A3-H-Z/AY. Capacitive sensors are not very good at discriminating between materials they are mainly used to sense an object is present versus identifying the material.

[@JOMACAR1719]

EXCELENT. I´m going to use in my classroom.

[@DorianMcIntire]

+Jose Carlo Thank you very much. I'm very honored by your use of the video in this way.

[@eugeneseradilla3465]

Dorian McIntire thank you so much for this video, this is a big help for me,I was just starting taking up a course in automation and you explained really good,hoping that you keep posting videos like this that help us with our studies and later on with our job,again thank you so much

[@locsei105]

Thanks! Very informative video.

[@DorianMcIntire]

Thanks!

[@AL-bn3bl]

Can this be adjusted to sense just one BB passing through the sensor in the tube?

[@DorianMcIntire]

Possibly, if the tube was slightly larger than the BB and a smaller diameter sensor was used.

[@abdennabimorchid]

Capacitive sensors are based on the all or nothing principle. Are there any capacitive sensors that change the output signal (analog) according to each material detected? I need an analog sensor, please help me

[@DorianMcIntire]

Unfortunately the only options so far are to use an assortment of sensors to differentiate materials. As you mentioned the capacitive sensor is only capable of measuring the dielectric properties of a sensed material and reacting accordingly when a threshold is reached. An cluster of capacitive, inductive, optical (color and reflectivity, magnetic and other sensors is a good start but the property possibilities of materials are extremely wide.

[@KoiAquaponics]

if I have a stainless steel tank, that stores water, can i use this to detect water level inside?/ like if its too low, to turn on a valve?

[@DorianMcIntire]

No. A capacitive sensors electric field cannot penetrate metal objects.

[@patriciocarrasco5425]

Hello, I need to detect water inside a PVC pipe, is it possible to adjust the sensor for this task? What model do you recommend?

[@DorianMcIntire]

I believe you could make it work. You will need a capacitive sensor with a large head that has a adjustment screw on the back. 1 to 25 mm would work but make sure it has an adjustment screw. www.amazon.com/3-wire-Capacitance-Proximity-Switch-Detector/dp/B0057M416A/ref=sr_1_2?ie=UTF8&qid=1490496568&sr=8-2&keywords=capacitive+proximity+sensor

[@swastikmohapatra1382]

Hi. Great demonstration :) Actually, I am building a waste segregator which separates plastics, glass and paper. Is it possible to differentiate between wastes using this capacitive sensor? Or do I have to purchase some other sensor for this purpose? Please help me out.

[@DorianMcIntire]

The types of sensor necessary will depend on the materials. Use an inductive sensor for metals and a capacitive sensor for non-metals. The difficult part is distinguishing between paper, plastic and other non-metal materials. I wold search for a sensor that can sense the dielectric proprieties of the material to help with that issue. Thanks for commenting.

[@swastikmohapatra1382]

Thanks for getting back to me. Capacitive sensors depend on the distance right? Which means the higher dielectric materials have a chance of getting detected at a greater distance than the smaller ones. Can I then use two sensors, one that detects plastic at a certain distance and rejects others and another one that accepts other kinds of waste? My main aim to is to separate bio and non biodegradable waste.

[@DorianMcIntire]

Yes, Capacitive sensors can possibly determine material using distance, in controlled situations, but it would be very difficult to get consistent results. So much would depend on whether the material was wet or dry, thick or thin and other factors. I've noticed that many recycling faculties seem to focus on material handling methods to separate material on the fly. Properties such as material density (paper/non-paper), ferrous/non-ferrous are easy to separate and what remains typically will require special methods such as those you are proposing. The problem is not a simple one. Good luck.

[@swastikmohapatra1382]

I am already using an Inductive proximity for separating metals. I guess I can develop some system by connecting 3 Capacitive proximity sensors and then averaging the detection value(around 20-30 samples) for a wide range of materials. That would at least give me a threshold of the most common waste like plastics, paper, wood, food waste etc.

[@ronaldm151]

Hi Dorian: i'm filling a bulk container with solids and can get a 24 vdc relay to activate when it receives a signal from the sensor. Question: how can I get the 24 vdc relay to activate with the disappearance of a signal from the sensor when the container is empty ?

[@DorianMcIntire]

You will really need two sensors. One sensor is used to detect when the container is filled and the other is used to detect when the container is low. The high level relay stops the fill and the low level relay begins the fill.

[@ronaldm151]

@@DorianMcIntire Hi Dorian: much appreciate the reply...the difficulty is the wiring of the two sensors. the low sensor to start a small 24 vdc motor when the level of the solids is low and the high sensor to turn it off when level if full.

[@DorianMcIntire]

Use a Normally open relay contact with the low-level sensor to fill and use the Normally Closed relay contact to stop the fill. The contacts should be connected in series with the pump or fill valve..

[@ronaldm151]

@@DorianMcIntire Hi Dorian:' understood....in your video can you show both a high and low level sensor and how they are wired ....especially the wiring to a small motor....that would clear up the wiring diagram...appreciated.

[@arunmurugasamy1335]

@@DorianMcIntire sir....can you please let me know the wiring diagram for switching on nd off a vacuum Hopper Loader..pls

[@nurishahaniakamarudin7417]

Sir, can I know by using this sensor and arduino, how do I know the value of each type of material is different ?

[@DorianMcIntire]

The capacitive is not selective in a useful way it is simply more sensitive to materials with high dielectric constants. Selecting a a material would require an array of different sensors each detecting a different property of the material.

[@nurishahaniakamarudin7417]

@@DorianMcIntire For example , I connect this sensor with Arduino , so I need to set various of dielectric value based on the data sheet provided for each material ? Is it like that ?

[@DorianMcIntire]

The output of the sensor is always digital (On/Off or 1/0) it is not an analog device so you cannot measure the dielectric properties directly. Getting a signal when the sensor is further provides an indirect indication of the dielectric properties. I would find another sensor, no doubt much more expensive, if I were you.

[@chloerobles2543]

Can capacitive proximity sensor is able to detect organic materials like fruits or meat ? Thank you Sir

[@DorianMcIntire]

They can detect anything containing moisture , but they can't tell you what the material is.

[@amjidali3826]

I am sonny from China, I need your guidance for choosing sensors and motors for my project. I want to detect paper(banknotes) and then i need to trigger the motor to open the gate/ door of storing place. Thanks a lot.

[@amjidali3826]

I want to turn on the motor

[@amjidali3826]

Do I will also need the control board for it

[@DorianMcIntire]

The best way to detect the presence of paper is by using a through-beam photoelectric sensor. senasysphotosensors.com/photoelectric-sensors/thru-beam-sensors

[@ashesh_dubey]

Sir I know that a capacitive sensor gives digital signal as output and hence can't be used to differentiate between materials. But i read somewhere that we can adjust it using arduino and set a threshold so that it gives one of the two binary signals above that value of capacitance and using this we can separate wet and dry materials as wet materials have significantly high capacitance. Can you help me how can this be done exactly?

[@DorianMcIntire]

I do not know of any way to make this purely digital sensor do more than merely sense a material. There are, no doubt, other sensors that are capable of providing an analog signal. Several sensors could work together, if each sensor was adjusted for a different sensitivity.

[@carissapereyras8682]

Hi sir! Thanks for the helpful video! I just want to ask if it was possible to make the sensor detect specific objects like just plastic, not rubber, not water, just plastic? Like can I make the sensor not detect other objects?

[@DorianMcIntire]

It usually takes a few different sensors to detect special properties of material. You can detect metal or non-metal with inductive sensors, most objects with capacitive sensors and hall effect for magnetic materials but no one particular sensor can differentiate between paper, plastic, water, etc.

[@carissapereyras8682]

@@DorianMcIntire Ok sir. Thanks!

[@jcpineda1405]

Hi, sir! Can it detect sand particles?

[@DorianMcIntire]

Not individual particles but it can detect sand in a container.

[@MARUTI96]

@@DorianMcIntire sir can I detect sand in a water(a container filled with full of water and some sand is put in it), please tell can I sense the sand level in the water.

[@Migueldeservantes]

Can it be programmed to detect gold, Platinum, or other metals like those ones??

[@DorianMcIntire]

+Migueldeservantes These can only detect the presence of metals but not the type. Other types of metal detectors can actually be tuned to detect the type of metal. I want to build several metal projects when I get a chance and use a microcontroller to tell me metal types.

[@Migueldeservantes]

Thank, I honestly didn't know what was possible and what was not! The only thing that I can comprehend is that "what is detected is the electrostatic signature" Then? that is all what can be set for?

[@DorianMcIntire]

+Migueldeservantes Sorry I forgot we were talking about the capacitive sensor and not the inductive sensor. Capacitive sensors can typically just tell you that something is there but not what it is.

[@mykideas381]

Could this capacitive sensor detects if that tiny plastic balls drop one at a time? just like a counter for each ball for example.

[@DorianMcIntire]

I'm not sure since their are many variables. I would use a thru-beam photoelectric sensor since it will register small, opaque objects and has a very fast reaction time.

[@mykideas381]

Thank you sir Dorian McIntire. I actually use a thru-beam photoelectric sensor and it works very well. I'm just looking for another option since photoelectric sensor is much affected with ambient light variation.

[@stevenlee1726]

Can this type of proximity sensor interface with microcontroller? instead with PLC

[@DorianMcIntire]

Yes, See my videos about interfacing proximity sensors with Arduino.

[@danedward546]

Hello sir we are working a capstone project that using this sensors in arduino can u guide us we dont have an experience in arduino.

[@DorianMcIntire]

The following link is to video, I produced, about using Proximity sensors with the Arduino: kzbin.info/www/bejne/qaCtZZawoLCjipY Hope this is useful.

[@PongsakornRitrugsa]

Can this sensor detect empty transparent plastic bottle ? I looking at LJC30A3-H-Z/BY for detecting the empty transparent plastic bottle but not sure.

[@DorianMcIntire]

+Pongsakorn Ritrugsa Yes. Virtually any material can be detected. Just make sure the sensor has an adjustment setting.

[@joshuaflores2245]

can this sensor differentiate plastic bottle and glass transparent bottle?

[@stalinsubbiah3238]

crown cork is stainless steel type of material then how it attracted by inductive proximity and refro reflective photo sensor?

[@DorianMcIntire]

Any metal, even if it is not magnetic, can be detected by an inductive sensor. The material must only be good conductor of electricity.

[@adamchoufi3086]

How can we differentiate between materials(glass, plastic, metal etc.) using proximity sensor?

[@DorianMcIntire]

Standard proximity sensors are not capable of doing this although a combination of a capacitive and inductive sensor can differentiate between metals and non-metals. There are some specialty sensors that can help with this.

[@adamchoufi3086]

do you know any sensors that can differentiate between paper and plastic? please

[@kwiliq8]

Hi, Is it possible that the capacitive sensor differentiate between glass and plastic ? for two sensor which are identical ... one adjusted for glass and the other for plastic?

[@DorianMcIntire]

+Elc.danger Refaei I'm not sure about this. You really need to be able to measure the dielectric constant of the material, for non-conductors, to be sure. Sounds like a possible research project.

[@kwiliq8]

+Dorian McIntire perfect , yes it is for nonconductors only,, i am working on a project now were i need to make sure i can differentiate between glass and plastic.. after watching your excellent video - thanks for your efforts - I think it might work that the same sensor can be adjusted for different material.. ill buy two .. one for glass and the other for plastic .. I hop it will work. Thank you.

[@DorianMcIntire]

+Elc.danger Refaei Please let me know how it goes. Thanks.

[@kwiliq8]

+Dorian McIntire Definitely .. i will buy the sensor from amazon .. is it a good source for that sensor or do you prefer other website ? Thank you.

[@DorianMcIntire]

+Elc.danger Refaei Amazon is good. You will pay a small fortune sensors ordered through an industrial supplier. Good luck with the project.

[@akshaytayade387]

when you are pouring water at that time why it doesnt sense water .......plzz use output device to

[@aqilahshahrul]

hi, what is the maximum distant it can detect the object?

[@DorianMcIntire]

It varies with the sensor size but an inch is possible.

[@shubhampatil6628]

Sir can we use it for running process

[@DorianMcIntire]

Not clear about you are asking. Please clarify. Thanks.

[@charumathi8556]

Is there any particular sensor to detect plastics?

[@DorianMcIntire]

The capacitive sensor in the video detects plastic but it also detects most other materials. I'm not aware of a sensor that just detects plastics.

[@charumathi8556]

Dorian McIntire thank u so much for ur reply

[@Ella-we4ss]

hello sir can i use only 1 sensor to differentiate and segregate metal, plastic and paper?

[@DorianMcIntire]

No, please see past comments and answers about this topic.

[@Ella-we4ss]

can i use capacitive for plastic and paper?

[@DorianMcIntire]

Yes, Capacitive sensors will sense virtually any object including metals.

[@Ella-we4ss]

last question but i can use inductive for metal, ultrasonic for plastic and capacitive for paper? each sensor for only one object

[@DorianMcIntire]

You can definitely use inductive for metal and know that the object detected is actually metallic. You can use ultrasonic for plastic and I guess your thinking is that you want to distinguish between soft, non-metallic materials like paper and hard materials like plastic.

[@ryanmendoza399]

Hello! can this detect empty transparent plastic bottles and ignore paper materials at the same time or vice versa?

[@DorianMcIntire]

Not really.

[@ryanmendoza399]

Dorian McIntire what are 2 different trash materials that this can detect one and ignore the other one at the same time if I can ask?

[@vyamdrc1622]

Hats off to u Dorian McIntire, this tutorial is so well explained that only morons disliked it. :-)

[@srinivas009ful]

sir...does it detect metal and non metal?

[@DorianMcIntire]

A capacitive prox. sensor senses both metals and non-metals.

[@victorkoot]

Does it also detect through frosted plexiglass

[@DorianMcIntire]

Yes. It can detect through most thin-walled materials, when adjusted properly, except metals.

[@SkylerF]

Dorian McIntire Don't hall effect sensors work through metal?

[@DorianMcIntire]

Skyler F It depends on the metal. Magnetic material such as iron or steel "short out" magnetic fields so magnetic fields will not pass through these metals. Non-magnetic metals such as copper or aluminum will allow only stationary magnetic fields to pass through but not moving magnetic fields. It all gets complicated and really depends on the application.

[@VinodKumar-yj5du]

Inductive and capastive sensor per Kia likha hota hai

[@parthsonani2151]

can it detect empty transparent plastic bottle???

[@jean-claudenjeckforty4757]

Yes depending on the adjustment

[@Bozojimmy]

how can we use this detect " end of roll"

[@DorianMcIntire]

Unless the material is very thick it would not be the best sensor for the job. If the material is thick you could sense the side of the roll until nothing is left.

[@Bozojimmy]

@@DorianMcIntire Its actually a thin plastic paper wrapped around a cardboard spindle. WHat sensor can i use in this case ?

[@zaidulm.d7258]

sire Hinde

[@selimgundogan8810]

Güzel ama ingiliççe ('_')

[@teanleechen5187]

send me diagram

[@DorianMcIntire]

kzbin.info/www/bejne/p6jNgaenr95lpLs