Perfectflite SL100 StratoLogger Altimeter component?

[Winston]

I don't own a StratoLogger and can't find a photo on-line of sufficient resolution, so I'd like to ask a favor of any owners. On the underside of the board, what are the markings, if any, on device U3? I believe this is the barometric sensor and I need an inexpensive one that senses to 100k feet for "near-space" balloon flights. The one I'm familiar with from the Honeywell ASDX series is through-hole, not SMD, and costs too much, $44 each in unit quantities.

Looks like their Pnut altimeter uses the same sensor at U3, so a peek at one of those would help, too.

 

[robbdm]

I don't own a StratoLogger and can't find a photo on-line of sufficient resolution, so I'd like to ask a favor of any owners. On the underside of the board, what are the markings, if any, on device U3? I believe this is the barometric sensor and I need an inexpensive one that senses to 100k feet for "near-space" balloon flights. The one I'm familiar with from the Honeywell ASDX series is through-hole, not SMD, and costs too much, $44 each in unit quantities.

Looks like their Pnut altimeter uses the same sensor at U3, so a peek at one of those would help, too.

See if this is sufficient.

 

[MWC]

I don't own a StratoLogger and can't find a photo on-line of sufficient resolution, so I'd like to ask a favor of any owners. On the underside of the board, what are the markings, if any, on device U3? I believe this is the barometric sensor and I need an inexpensive one that senses to 100k feet for "near-space" balloon flights. The one I'm familiar with from the Honeywell ASDX series is through-hole, not SMD, and costs too much, $44 each in unit quantities.

Looks like their Pnut altimeter uses the same sensor at U3, so a peek at one of those would help, too.

https://www.meas-spec.com/product/pressure/MS5607-02BA03.aspx
Same sensor as my RRC3 altimeter.

 

[Winston]

See if this is sufficient.

View attachment 144254

Thanks, better than what I had but still can't read it well. Markings may just be house numbers.

 

[bobkrech]

https://www.eciaauthorized.com/search/MS5607-02BA03 lists the retails sources.

Future Electronics sells them in for $7.12 a piece in unit quantity.

Bob

 

[Winston]

https://www.meas-spec.com/product/pressure/MS5607-02BA03.aspx
Same sensor as my RRC3 altimeter.

Thanks. The specs on that will definitely work if I can get my hands on a few. A very capable new device. Mouser sells them in huge quantities only by special order and I hate requesting samples since I'm not developing a commercial product for which such samples are intended.

The RRC3 device is in a significantly different package than the device on the StratoLogger and the ports are arranged differently, at least according to the photo in the MS5607 datasheet. Interestingly, the photo of the MS5607 device on Mouser with the image being labeled, as usual, "Images are for reference only See Product Specifications" looks a lot more like the device on the StratoLogger, ceramic looking package with the side-by-side port arrangement, perhaps an older package version Missileworks wasn't shy about IDing the device on the RRC3, so maybe Perfectflight won't be either. I'll ask. I'll bet it is the MS5607, just an older package.

 

[Winston]

MS5607 it is! Weird that none of the altimeters using it have packages that look even remotely like the one in the late 2012 datasheet. Must have been a recent change made for some reason.

Parallax Altimeter Module MS5607

https://www.ebay.com/itm/NEW-Parall...408?pt=LH_DefaultDomain_0&hash=item1c35ea3b90

 

[jderimig]

https://www.eciaauthorized.com/search/MS5607-02BA03 lists the retails sources.

Future Electronics sells them in for $7.12 a piece in unit quantity.

Bob

theoretically.

 

[MWC]

MS5607 it is! Weird that none of the altimeters using it have packages that look even remotely like the one in the late 2012 datasheet. Must have been a recent change made for some reason.

Parallax Altimeter Module MS5607

https://www.ebay.com/itm/NEW-Parall...408?pt=LH_DefaultDomain_0&hash=item1c35ea3b90

The plastic cased MS5607 was phased out of production... now a single offering with the metallic case

 

[cerving]

The US MeasSpec dealer is Servflo (www.servflo.com), their minimum order is $25. They take credit card orders. Last price I got on a MS5607 was $5.00 each 1-9 qty. You might also want to look at the MS5611, it's $2-$3 more but it has an extra bit of usable resolution. In your application, it might work better.

 

[Winston]

Yep, just found the old data sheet:

https://www.chinaankai.com/data/2008/c/www.chinaankai.com/db_pictures/201110/20/1319080271806496.pdf

That's the MS5607-02BA01 vs the newer MS5607-02BA03.

 

[Winston]

The US MeasSpec dealer is Servflo (www.servflo.com), their minimum order is $25. They take credit card orders. Last price I got on a MS5607 was $5.00 each 1-9 qty. You might also want to look at the MS5611, it's $2-$3 more but it has an extra bit of usable resolution. In your application, it might work better.

Thanks! I did find them in my searches, but didn't investigate further because I assumed they'd require large quantity orders.

Here it is, showing the old package:

https://www.servoflo.com/pressure-s...gital-pressure-sensor-modules/463-ms5607.html

 

[cerving]

The data sheet linked to that page is the -02BA03 part with the stainless steel cap. All of the MEMS baro sensors have gone to that package because it's cheaper to make than the ceramic packages; the last widely available digital baro sensor that I know of with a ceramic package was the Bosch BMP085, it's still around because of the large number of them that Bosch produced but it's been replaced by a stainless steel capped version too (the BMP180).

 

[fox_racing_guy]

Good enough?