The last I found, there are more than 10,000 VOC's, and TVOC is a reading of the total of VOC's in a given area (your home, office etc.)... There is no sensor available that will tell you what VOC is being detected - which in my humble opinion - makes the reading useless, and causing more paranoia than anything helpful. In other words... A TVOC sensor will go nuts if you take a shower - * Is taking a shower harmful to you? - NO. A TVOC sensor will go nuts if you light your favorite candle to add fragrance to your home - * Is a candle burning (enjoying your favorite fragrance) harmful? - NO A TVOC sensor will go nuts as you are cooking breakfast to enjoy with your family and friends - * Is cooking breakfast or dinner suddenly harmful? - NO ETC., ETC., ETC.... There are a few VOC's that are harmful - but again - a TVOC sensor or VOC sensor will not tell you exactly what it is detecting, so you have no idea that what the sensor is detecting is or is not harmful, so causing paranoia with no explanation - making it pointless. HCHO (Formaldehyde) is in the trees in the forest, and why a HCHO sensor will go nuts around construction sites, remodeling your home, putting together a piece of furniture you buy at your favorite box store, folding or cutting paper, making your bed, vacuuming the carpet, sweeping the kitchen floor, changing your clothes etc., etc., etc... HCHO is in everything from wood to paper to clothing to pens, pencils, toothpicks, coffee cups, shoes, wallets, and the list goes on and on. Unless you have stored HCHO in liquid form in your home, there is again, no use in my opinion to have a HCHO sensor, as it will just cause paranoia - just open a window from time to time to keep the air fresh. The only use I can see for having a HCHO or TVOC sensor, is to know when you should open a window - and honestly do we really need a sensor to tell us that we should open a window? - NO In my opinion there are only two sensors that everyone should have in their homes for safety from life threatening gases, and those two sensors are - CO and CO2 period. CO and CO2 are both odorless and colorless gases, so we have no idea they are present until it is too late. Hydrogen is another gas that is deadly, and that is given off while charging lead acid batteries, and will have the same symptoms as CO, and as a matter of fact, Hydrogen is so very close to being CO that it nearly is CO, and why the symptoms of over exposure to it is so similar to CO. CO2 is part of the universe, and it is all around us all the time - 24/7/365... We exhale CO2 with every breath, and why wearing a mask for too long of a period can and will cause a person to faint or have a heart attack. Being in your car with a lot of people with windows closed can cause the people inside especially the driver to loose consciousness. Using AC in your car on MAX mode is a very dangerous habit as it doesn't allow fresh air inside, also causing the loss of consciousness if too many people are in the car with you exhausting CO2 with every breath. Humans exhale more than 50,000 ppm of CO2 with each exhale, and that will add up very quickly in a closed space with a lot of people (I talk about this in at least one of my videos). AQI numbers are also pointless as they are based on your local town that you live, and why the numbers inside your home will more than likely never match what the AQI number is in your local area. AQI numbers are also based on the monitor that you have as the number is calculated by the number of sensors inside. A monitor with only two sensors will have a much different AQI than a monitor that has 6 sensors inside... A monitor that has an AQI number that more closely represents what the local AQI number is, it is because that monitor connects to the internet to give you that data and more than likely has nothing to do with the sensors inside your device. The reason that CO2 is very important to know is because outside there is a vast area for CO2 to dissipate into the air (world). Inside your home, the CO2 is not as lucky, as it only has the area inside your walls to dissipate itself, and if your windows are all closed, the CO2 cannot escape, causing the number to go higher and higher. Normal CO2 levels in your home are from 600 to 800ppm. Some companies say up to 1000ppm, but I don't like that high of a number for any length of time. 600 to 800ppm is fine to be in, but anything above that, you should open a window, and that number will quickly go down. If you are having an issue with CO, you will know because the number will go from 0 to 2 or above... Normal CO monitor levels will be 0 or 1 and right back to 0. If CO goes to 2 or higher and stays there for a few moments, something is wrong and should be looked into immediately. CO is very very dangerous (I know, because I was poisoned by CO), and I nearly died from exposure, so why knowing CO and CO2 is so important to me, which is why I created most of my videos. I know this is a lot of information to take in, but I am hopeful that something that I have said has helped, and answered your question/s. Thank you for your question and thoughts, they are very much appreciated.

@@Outside-In. thank you so much thats cleared up everything I need to know

@@asianboss6355 Wow, that was some fast reading, it seems only a minute since I replied... Glad it helped 👍👍👍

User replaceable would be a great idea. That is the unfortunate thing about air quality monitors - the sensors go bad after a few years or less. The new CO2 sensors last 10 years so better.

No I have not heard of that one, but will check it out. If it truly is made in the US - then I guess we don't have to worry about it being fake LOL.

Thank you for your thoughts - much appreciated, and glad it helped.

Thanks - it is great to hear personal experience. 👍👍👍

You are completely right - however, the Meco Eleverde was very disappointing. The Roedix is absolutely amazing for the size and portability, so I would choose the Roedix anytime over the others I have reviewed. Thanks for the comment and thoughts - much appreciated 👍

I love helping, so it is exciting to hear when it works - Thanks for the comment - much appreciated. 👍

It doesn't really matter - Fake is Fake is Fake, no matter what they put in it - it can't be trusted. Good points though. I was new at sensors when doing that video, and I was just focused on the Fake aspects. A monitor that has just one fake reading, (and this one has several) - is all fake and can't be trusted no matter what's inside that may be legitimate. 👍

@@Outside-In. Yeah, totally agree. I was being OCD due to being AS, purely on the comment "There is no sensor." It doesn't matter indeed. That product is a total scam.

@@gruvinnz Exactly 👍

Thank you Leon for the kind sentiment - much appreciated. God bless you as well my friend. 👍👍

Thank you Alex for the question. No, these glasses are not Bluetooth capable.

@@Outside-In. Great review btw, I've been searching for Bluetooth capable/USB wearable glasses that can connect to a laptop and show up as a useable device, however I'm finding nothing as yet :/ I find this quite strange a webcam of your POV is very useful for remote support, wondering what enterprises are using for this.

@@alexs5373 I am not sure what companies are using for the POV aspect, but these glasses work great for that, but I do believe you can get glasses that are Bluetooth, but not sure which brand. I may have to look into that.

Hey Alex, I just found a pair of camera glasses - with wifi, but not sure how good they are obviously, but I said I would look around, and I finally found a possibility after a lot of searching. The link is below. They are a bit more expensive (probably because of the wifi) They have a 59 dollar version with Bluetooth, but the Bluetooth is only for music and calls - not camera. Hope this helps.... www.amazon.com/RERBO-Sunglasses-Bluetooth-Protection-Polarized/dp/B0C741K84K/ref=sr_1_8?sr=8-8

@@Outside-In. Will take a look, I know meta in April 24 introduced their glasses to work in WhatsApp, you can hit the glasses icon and switch away from phone cam to glasses cam, meta ray bands only run in portrait though and the resolution is weird size and you need their My view App :/ That's why I was looking for like a web cam pov glasses for a laptop, selectable camera.

I Don't Recommend Hotkrem any longer - they are very unreliable - I think the quality control has gotten to the point that they can't be trusted. Smart Sensor is the way to go for quality, but that is what I could afford anyhow. I can't afford thousands of dollars for lab quality meters, but Smart Sensor is very accurate at a very reasonable price in my affordable opinion LOL... Thanks for your comments - much appreciated.

Thanks for the clarification

@@Outside-In. thanks for your understanding , as you know the co2 gas is heavy gas, so the bottom sensor sees co2 but the above sensor not yet, what do you think about Hotkrem co2 monitor , i thinking to buy one :) , thanks

@@WRDO I love the Hotkrem CO2 monitor, but unfortunately, Hotkrem has gotten pretty bad on quality control, so cannot recommend them any longer. Smart Sensor is my favorite for CO2 and CO meters. Also - the Fake Chinese monitor is very fake, so please don't put any trust in it.

Thanks Joe 👍

Cologne will make the reading go high, getting out of the shower and walking by the monitor will also make the reading go high, if someone is drinking alcohol, and breathing next to it it will go high, also I believe that it is affected by other readings as well, so why that it seems random - making it appear to be legitimate when it is not. As far as low budget meters... I am not sure there are any. By that I mean - all of my budget meters have either quit working or no longer are consistent even with re-calibration. So I would venture to say that a quality monitor is going to be in the 100's of dollars range, and even some of those don't last more than a few weeks or months, so your guess is just as good as mine unfortunately. The two most important readings to know is CO and CO2, so I would forget about any monitor except for those two, and I believe that paying a bit more for a better quality meter is the best. CO is the most important, CO2 is second most important. CO2 and CO meters can be expensive, but CO is the least expensive of the two. The Smart Sensor CO and CO2 meters that I use are what I recommend. CO2 sensors are expensive, and maybe it is because they are harder to make or harder to come by the materials to produce, not sure. Hotkrem was my favorite low budget monitor until I found out that some work, some don't, and some work for only a couple days or weeks, so I can't even recommend Hotkrem any longer, I have simply ran out of monitors that I can recommend - except of course Smart Sensor CO and CO2 meters. I am sure there are other CO and CO2 meters that are just as good as Smart Sensor, but I simply cannot afford to buy them - way too expensive LOL. I know this information probably doesn't help that much and I am sorry about that, but that is what I am finding out after all the tests that I have done...

I have not been able to purchase the qingping monitor. I have contacted several companies, but no one wants to send a monitor for me to review, and I can't afford to buy these any longer - too expensive. Sorry I don't have better information, but as Outside In gets more subscribers, the more likely companies will be to send products for me to review and test for them. Thanks for your comment and suggestion - much appreciated. 👍👍

👍👍 Thank you for the comment - I try to cover as much detail as possible, so making a decision is a more pleasurable experience.

Thank you for the comment. I actually am not using the silicone any more as it sticks too much to the spring, but it may be because of the what the Yihua spring is made of. I was told that the Hakko springs are much better for solder not sticking to them, and you can get them on Amazon. The Hakko springs are the same as the Yihua springs only made of different (and I guess better) materials. I haven't tried the Hakko springs yet, but I am going to be purchasing those to give it a try. I have to quit putting this off and go ahead and get the Hakko springs to try it out LOL... I am including a link to the Hakko springs on Amazon (it is a pack of 10 springs), and if you get these, please let us know here how they work for you (if they are better than the Yihua spring). www.amazon.com/gp/product/B000E9VCXG/ref=ox_sc_saved_title_6?smid=A35X3GS59396Q6&psc=1

There are a lot of reasons that this would happen... Humidity in the Summer will effect TVOC and HCHO, Remodeling in your home, Remodeling at the neighbors house and your windows are open, making the bed, cleaning the house constantly, many people taking showers one after another, cooking all day etc., etc., etc.. Also when you first get a monitor, you need to give it at least a few days or a week to get settled into your environment for the readings to stabilize. Hope this helps, and thanks for the question.

You are welcome. 👍

Thank you for that great information - much appreciated. 👍👍

@MrSpacelyy Thanks for your comment and thoughts - much appreciated. 👍

@hafiyyanmayada360 If you are referring to the one from Aliexpress, yes, I can recommend that one. The Hofun in this video, I can not recommend as I had to stop using mine due to failing to work too often. The Bosean, hmmm. The one sold on Amazon is a fake, so please do not buy that one. Am not sure about Bosean. If you are going to buy Bosean, I would recommend buying directly from their website (the company). Hope this helps.

​@@Outside-In. Bosean seems more honest about its sensor information, stating that "T-Z01: 4 sensors：HCHO sensor, PM2.5 sensor, TVOC sensor, temperature and humidity sensor. CO2 and CO are inferred from the data detected by the TVOC sensor." but I think I will buy a cheaper one like the one you have reviewed. Thanks for the answer.

@hafiyyanmayada360 The Bosean I ordered from Amazon is definitely fake. If Bosean is using the TVOC sensor to give the CO and CO2 readings, then that one is fake also. CO and CO2 readings cannot be derived from a TVOC sensor. Thanks for your comments and questions - much appreciated. The Hotkrem I can no longer recommend either because of very poor quality control.

👍😂

Thanks for your input - much appreciated.

What faults

Actually, I was doing some testing, and found if I used a 110k ohm resistor in parallel with the potentiometer that I took out of the motor controller, it would give me the 83k ohms of resistance that I need to get full use/rotation of the potentiometer, so I ordered some 110k ohm resistors and am going to give it a try. I know that I said I didn't want to do the resistor in parallel thing, but I cannot find the correct potentiometer at all - not even close, so I thought - why not give it a shot and see if it will work???. It will give me a chance to play around with the resistor idea from others to see if it will work since I can't find another option. I can't even find two 40k ohm potentiometers to use in series, so just maybe the resistor idea might work. The only way to know for sure is to try right?... 🤔

Thanks Joe 😁😅👍

You are welcome - 👍

Thank you for your comment and bread-down - much appreciated. 👍

@@Outside-In. you are welcome

@@rdtech9153 👍

You may be right, sounds brilliant... 😆 🧐

You are welcome and thanks for the comment - much appreciated. 👍

I would say that there is no short-circuit protection, because there would be no need, as there is only a usb connection, so no way of creating a short-circuit connection without taking it apart and purposefully shorting the system out, or sticking a piece of metal inside the usb port. I am not sure if you could connect these in series, but you are right, that would be kinda cool, but am not sure it would be practical, because it would be much easier to just buy some 21700 batteries and connect them is series for the intended voltage. Thanks Joe for your comment and questions, very interesting. 👍👍👍

The description states stabilization, but you have to make a decision on what you think from the video as I was driving down the road. There are no settings in the config file (which you can also see when you watch the video) to turn on or off image stabilization, so I am not sure. Thanks for the question

@@Outside-In. Legend

@@deweizhang9054 👍

I think it showed around 400-450 amps with the battery and leads I was using. The heavier the gauge and length of cable, the better the performance.

@@Outside-In. Strange. I just tried the sandwich method on a brand new Samsung INR21700 40T and it wouldn't stick at all. Weld current was ~409 A. I eventually cut off the copper strip that was in the pack I was repairing, soldered nickelstrip to the copper bar then succesfully spot welded the nickelstrip to the battery. Two years ago I repaired an identical pack and I had zero issues welding the same type of copper strip. The only difference I can think of it that the tips were sharper back then.

@@jcvjcvjcvjcv Spot welding copper is the hardest thing for a welder to perform. Make sure the copper strip is not more than 0.1mm thick, and the nickel also not more than 0.1 or 0.15mm. If that still does not work, you may have to sharpen the needles a bit, or at least sand the tips to clean them so they can provide a better weld.

Thanks Drew for the subscribe, but also about the .01 scale, I will have to look at that. Good call. 👍

@@Outside-In. Yeah it works pretty good. I got the same I've you recommended in the video, except .01 model. You also can save a little more money and buy some .07 or 8lb test fishing line

@@drewrinker2071 Thanks for the tip on fishing line. 👍

Thanks for your thoughts and innuendo - much appreciated. I bend to no one, I bow to no one except God, so no, I did not wear a mask in the "plandemic", as a matter of fact, I was asked to leave several establishments because I refused to wear a mask. I hope this answers your concerns my friend - have a great 4th of July, and let us always remember, - before we decide to pass judgement on someone, - Let us be sure that what we think is the truth - really is the truth... 👍

👍

Yes, for sure. Smart Sensor products are my favorite products to use. Thanks for the question, hope this helps.

@@Outside-In. cheers mate

@@ozdog822 👍

Sounds like a good possibility, but you never know, it could be that the hose it broken or clogged. It may also be at the reservoir possibly. Like mine, wasn't sure until I tore into it.

Glad you enjoyed

👍👍

👍👍 Thank - Glad you liked it.

You are very welcome, and glad I could help. 👍👍👍