TNP #42 - Combustion Gas & Emissions Analyzer E1500 (O2, CO, CO2) Repair, Teardown & Experiments 

I do field measurements on boilers and yours results are Ok. Flue pump draws more than candle produces and that is why you have high oxygen content in flue gas. I also developed some hardware for my needs and if i remember well one electrode usually is Pb and second one is platinum. Pb is consumed even when sensor is in pure air. That is why life is max 4-5years. Those instrumens ussualy are destroyed when sensor leaks and pcb is corroded. But you have got nice unit.

Very interesting video indeed. Thanks for sharing with us.

That first shot gave me scale-shock! My brain had decided that this was the size of an old-skool phone handset, and your hands looked TINY! lol

We use analyzers similar to this tool welding in live gas plants in the oil and gas industry. Ours are to determine levels of poisonous or flammable gas for safety reasons of course. Even sounds similar when the pump is running. We like to know exactly what atmospheric environment we are about to arc and spark in lol. The LEL sensor has to be changed regularly as it uses an interesting method for detection. It's a wheatstone bridge where one side is a reference and the other heats up and, when a flammable gas is present it heats up faster changing the resistance. A catalytic bead from what I can find out

That is the same exact model I retired last year when the sensors and calibration cost more than a new one.

It would be pretty interesting to see if you can find a way to make the other 2 sensors work, although it looks like you would also need the other 2 boards and ribbon cables. CO and CO2 are the only ones needed for adjusting boilers, although NOx is definitely helpful when adjusting blue burners (oil burners with an EGR valve), and SO2 could maybe be helpful when working with heavy oil, although the SO2 and NOx sensors are mostly intended for- and required when fixing block heat plants (generators that use their engine's waste heat to heat your house, and you can either use or sell the power as a bonus). I personally use Testo analyzers, so it's interesting to see the insides of another company's tester. On the Testo, all its guts are held in place by the clear rear cover (no wobbly BT module), and would likely fall out if I were to take that off, which is also why I will try and avoid that as long as possible. You are also specifically told to ABSOLUTELY NEVER whack it, drop it, toss it into the plumber van, on the floor, etc..., likely because things like that module might come loose or break inside. Also, in Germany, we stick the printout onto the boiler with a piece of tape, so everyone can see that it meets emissions and what values it had after the last adjustment, and see how much they changed now.

This was great and good 👍 thank you-

13:28 Pooch was the operator.

I use an inline amperometric oxygen sensor (Mettler InPro 6800) for my fish pond. Unlike this sensor, you can replace the electrolyte when it's consumed.

To make the two other sensors working, you will need the electronics boards (signal conditioning and calibrations coefs) and a parameter tweak in the software configuration. Might be able to tell you more about it but definitely not here.

Check the CO2. Outside it should read around 400-450 ppm, in a room typically 600-2000 ppm depending on the ventilation and the number of occupants. 0.2% = 2000 ppm in your lab is probably not healthy.

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Why are the subtitles so dark, ie, not easy to read.

Very Interesting! 🙂

the potassium hydroxide should react with CO2 in the air to form potassium carbonate, why does it still read as carbonate free in the raman?

That's an odd looking TV remote

Now Pooch has to sign the print out to make it official 😺

I have probably around 100 or more of those O2A2 sensors laying all around. Obviously all of them aren't working anymore. Electrolyte leaks are very common, I have seen many Ventix MX4s destroyed by those leaks (or rather by the people trying to clean it up). 2 years is rated lifetime of O2A2, they usually last for about 2.5 year in fact. The way it works is by having around 100-150 ohm resistor connected between the leads (to give it a little load), then you can measure the voltage by the help of ADC. The voltage under load is very small. The voltage in open circuit seems to be around 0.5V or so.

I am very jealous of your fancy raman spectroscope

That Agilent Resolve Raman @ 11:29 is quite the machine @ $65,000 USD

Picked up a different model from a garage sale with a dead sensor that I havent looked at yet. Hopefully not going to cost the 230 each you paid for those sensors lol

Those oxygen sensors have a fairly short life - typically a few years. They are, however, a very standard shape and pinout. Might be worth looking at something like an ME2-O2 sensor as a replacement, which should be easy to fit. Last I checked they were about $60 @ qty1, but the price may have come down since.

That Raman machine is pretty sweet. I have absolutely no need for it but I want one.

And now your challenge….. add 2000! Make it work!

I'm assuming the current levels of the ec sensors are pretty, do they use any special techniques to read the current or is just a shunt resistor?

Do you want some calibrated gas standards? I picked up a flammable liquids cabinet at an auction last year, and inside it were about a dozen cylinders of various calibrated gas mixtures for testing detectors like this. They are each about the size of a 1lb propane cylinder. All well past their expiration dates (unfortunately, as new they cost several hundred dollars each), but still might make for interesting experiments. I only have them still because I haven't figured out how to legally throw them away. Not quite sure what the best way would be to send them from the DC area to New Jersey, but they are yours if you want them.

I loved this episode, thanks! Using the r. Spectroscopy device to see what's in the sensor material and the candle was the cherry on the top of the video:) I'd love to receive an order for such project someday.

Why not measure the combustion gas from a resistor as it burns up?

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