Aerometrics phase doppler particle analyser teardown

[@lednerg]

Oh great, another phase doppler particle analyzer.

[@michaelhawthorne8696]

As I was watching this blog Mike, I imagined it was about dismantling a sophisticated bomb much like that depicted in many films especially the way you carefully slid out some of the internal components. Interesting item thanks for this Mike

[@aaronbrandenburg2441]

Yes I was thinking the same reminds me of the one where the hell did that photo quote String of Pearls something or other weapon and some sort of chemical weapon arrow with the one where you put swim String of Pearls capsules or nodules or whatever you want to call him in the guy's mouth and horse's mouth together call U stor mean and kills him and then uses the epinephrine injection on himself can't remember the name of the movie but yeah And also there was that MacGyver episode and of course the MacGyver episode where he's it disarming the missiles and uses a paperclip too short to pins on a circuit board or something like that. I remember that episode of Monk where he has that Miss or something on the rack and he's moving around. Mini the movie there is something like this I think one of them even hand but look like parts of this except with other things instead of the original guts to it it may have been used as part of that prop but just trades around a bit it looked a little different but yet the same so it might have been repurposed as part of their prop no idea the movie or anything on plot or anyting just remember it.

[@thavinator]

The reflect/transmit spectra of a dichroic filter are specified at a particular angle of incidence, so the "0 degree" marking probably indicates that that filter is specified at a perpendicular angle of incidence, which matches how it fits in the assembly. The other numbers are probably center wavelength and "full width, half max" bandwidth, 514 corresponding to an argon wavelength. Wouldn't expect to see a DPSS laser in a scientific setup of this caliber, gas is typically more stable with better optical performance.

[@TheLightningStalker]

Yes, I think you are correct. This would seem to operate at the 514.5nm argon line.

[@IDoNotLikeHandlesOnYT]

Indeed, www.eng.uwo.ca/research/afm/documents/tsi1.pdf says argon-ion lasers are most often used, with the wavelengths being 514.5 nm, 488.0 nm, and 476.5 nm.

[@xm07]

I don't know how about this model but we are using modern version of this instrument in airflow laboratory in Czech metrology institute to measure speed and homogeneity of the airflow. It's actually quite sensitive. We inject just o little smoke into to wind tunnel loop and it registers the smoke particles circulating in there for tens of minutes as far as I remember.

[@markusfuller]

I agree Mike. anything very expensive that I have ever taken apart always has Allen bolts, but i had never thought about it until you mentioned it :-)

[@ThingsWhichArentWork]

I always love your videos Mike - only problem is that you don't make enough of them. You're awesome!!!

[@OrbiterElectronics]

I just knew you'd come up with something hardly anybodies ever seen before Mike :) Love it.

[@fliptrontube]

Hmmmm. Aerometrics is still in existence, still making the same type of equipment, and at the same address, which happens to be about a mile from where I live. Maybe I will go visit, and give them a link to the video.

[@OK2BCK]

thanks for doing this Mike

[@90SecondsofAviation]

If there is a new video from Mike, I know after watching that video my IQ will increase for about 10%. Great video as always ! I love those teardown videos soo much.

[@aaronbrandenburg2441]

Hey at least none of us are Johnny Mnemonic she might want to stay away from these videos hehehe LOL.

[@electronicsNmore]

Nice piece of equipment.

[@bigclivedotcom]

It was still a pretty interesting bit of equipment. Can you even run photomultipliers at low voltage? There wasn't a simple choke based boost circuit on board? Even one that fed all three modules from just one of them?

[@aaronbrandenburg2441]

Hey big Clive nice to see you commenting on another Channel think I mentioned you before on other videos of his in comments???? Pretty sure I did too.

[@aserta]

I actually found it quite interesting. True, it is from the perspective of someone interested in design application, constraints etc. It's always a challenge to work within given parameters and yet still excel at it. I imagine working with all of the key elements on the table is quite rough for the guys who made it.

[@jcims]

What a jewel! Great disassembly and walk through, thank you! Btw, I found your channel through a comment you just left on colinfurze's hydroforming video. Glad I did, lots of great stuff here!!!

[@Lornda]

allen bolts, because after 30 years of wear and tear normal philips screws corrode or as everyone has a phillips driver people will try take things apart and round the screw. just my thought although i am probably wrong

[@aserta]

Nope. You're totally right. Hex screws are the way to go in machinery, serviceable devices and so on. Philips or flat screws don't cut it. That and hex/allen are quite old, it's just that you don't see them as used as the rest.

[@gorak9000]

Haha, I had to laugh at your comment about anything expensive always using cap head Allen bolts because it's so true (well, except bicycles - they use a lot of Allen bolts as well). All my MecE friends really like to use them (pretty much exclusively) in anything they build or design. Sometime I should ask them why they prefer them so much. In the medium and larger sizes, they are pretty difficult to strip or otherwise damage the heads. I always enjoy how the sides of them are slightly knurled - like anyone's ever run into one that could be finger loosened!

[@aaronbrandenburg2441]

100% agree in with their darling on the edge it does make finger tightening and loosening easy I think that's part of the idea is so that you can do it to get the screws started and in place because of precision and so you don't you could say gum up the works when starting the screws in any piece of equipment like that you would always always always use fingers over a tool when possible because of precision and you don't want tomorrow up those threads or cross-threaded them.

[@sheldonholy]

I was just getting ready to go to sleep...

[@poprawa]

This are crazy tolerances

[@Serostern]

"It has the feel of expensive solidness!" - I... I know that feeling! =P

[@backyardbasher]

could you use one of the lenses for soldering magnification ?

[@aaronbrandenburg2441]

Do you mean using it to generate The Soaring heat from a light source or getting up close to the solder joint either one I'd say LOL Did you ever hear about those round clear plastic balls and our feelings like that because of the shape causing fires list kids toys by accident I've heard of it please what are two thing like that because around sphere can focus the sun's rays to a point so is us a toy cost of Fire by sitting in the sun if the focus is just right on the spot and inflammable material.

[@SylwerDragon]

still it wasn't so bad. Make more videos like these :)

[@somebodythatiusedtoknoooooooow]

I watched it all and I don't understand a thing but its interesting. Is it old ? Is it rare to have one ?

[@redtails]

1990s it shows on the parts. Very obscure test equipment, probably less than a couple of thousand made world-wide

[@rutgerdehaan5076]

1998, and it indeed is a very specialized piece of kit.

[@redtails]

Rutger de Haan Yeah, I was surprised there were 1990 5th week timestamps on the photo-multiplier tubes. Relatively old stock tubes in a more recent device

[@aaronbrandenburg2441]

@@redtails agreed but you know what they say about some old things that were made during the new ones. Probably why they were old stock tubes by the way but still. One reason why they might be older stock tubes is yeah equipment like this is kind of obscure not made in very many numbers I wonder how big in the demand for for the most part tubes is in things like that and other pieces of equipment that would use them probably not on Mount Holly compared to other types of devices on the same ones and now just about everything is solid state and on a trip or whatever that has replaced something like that most applications so probably not a huge demand overall which means to fully going to be some tubes sitting around or Warehouse somewhere that would be older stock that still being put in your advices. And those tubes may not have been a rational as well who knows could have been swapped out at one time. Possibly replaced at the same time? For consistency and service life issues?????

[@TheEPROM9]

I love buying random crap off eBay to tear apart.

[@RODALCO2007]

Interesting, that device would have cost a bit to make.

[@Vape_Master69]

what do i have to study to learn how to use that?

[@douro20]

Environmental science, chemistry...

[@jebsaekam]

Physics. Lots and lots of Physics

[@FrankSandqvist]

Phillips&Pozidrive screws suck, allen and torx all the way :) They do feel a lot more professional, and you can use torque wrenches on them

[@FrankSandqvist]

While that is true, I don't see the advantage of PZ over Torx and Hex screws, which just give a very positive/solid feel when you insert the tool into the screw. Which in turn prevents you from using the wrong size tool.

[@CapitanoRed87]

13:20 I think you accidentally broke a lead

[@redtails]

well Philips screws look like wood screws; very unprofessional and they wear quickly.

[@gavincurtis]

If I wasn't in a faster than a bullet train to a 3rd world country called America, I would be able to watch this over 144p. But since we have 45 MPH Amtrak, it's gonna take a bit longer to get there and the shitty monopoly Time Warner Comcast internet will linger.

[@Razor2048]

Something like that should sell for $300 at the most when brand new. Why couldn't they include more hardware built in and probably a simple USB port to get the data out?

[@laharl2k]

i suppose because of bandwith and latency. You cant do everything digitally, it sometimes adds too much complexity to an otherwise fairly simple analogue circuit.

[@jcims]

Probably closer to $30,000. USB 1 was released just a few years before this was created and was far too low bandwidth to be very useful for this application. More importantly, however, there is no sampling or recording capability within this device. Think of this as an analog microphone, you still need something to sample the output of the sensors in order to record and/or measure the data.

[@frollard]

Those photomultiplier tubes alone are probably 300 each. ...the multipin connector on the back of the unit is probably a few hundred dollars. The machining of the housing(s) is probably several thousand dollars worth of precision work, particularly the '50 slit'. Edit: and the lenses...don't even ask.

[@randacnam7321]

Bean Mosheen The lenses are far more than $300 as the glass alone is easily 10 times that.

[@artifactingreality]

randacnam7321 What I'd like to know is how did Mike end up with this? Did the person who gave him it not know the lenses are worth thousands of pounds?

[@Ogma3bandcamp]

No such thing as a disappointing Mike video although I have to say the title offered a lot.

[@ChipGuy]

It was not disappointing, just not that much electronics in it.