BLYL CMS 50D+ OLED USB Finger Pulse Oximeter & Heart Rate Monitor 24hr Memory, Lanyard, USB Cable, Full Analysis Software

 For the price you won't find a better product. You can probably spend a lot more money and still get the same results. I bought the CMS 50D+ because I needed a monitor that can store information overnight and be able to upload to a computer for comparative study. All the others were well out of my price range and some didn't offer the reports the CMS 50D+ did. I have to say I am astounded by the reports this little oximeter can produce. I have attached 2 as examples. I have a rare condition that causes considerable pain, I have great difficulty sleeping and I wanted to know what was happening with my heart rate during sleep. The first photo shows a normal heart rate during sleep, the graph should show a curve in the heart rate as you sleep. Basically slowing down as the night goes on before speeding up as you are coming out of sleep giving it a curved look. I've only had one graph like that over the last 3 weeks of study. The second photo shows an abnormal sleep pattern with my heart rate fluctuating over the whole night, that night was particularly painful night as the pain was severe and I was also suffering chest pain. As you can see on the second photo in the figures it will tell you if you have events during your sleep. Events are situations where your o2 or heart rate drop below a certain level for a certain amount of time. There were 22 events were my o2 dropped by more than 4% for a minimum of 10 seconds. I am certainly no athlete so having an average heart rate under 50bpm is worrying; along with the chest pain tells me I need to revisit the specialist cardiologist. I was discharged after only 2 consultation and 1 CT scan which showed nothing at the time; now I have evidence that all is not right. The oximeter will do live view too giving warnings when o2 or your heart beat falls below a certain level. I haven't had the problems other users have had. The one problem I did find was keeping it on the finger all night, but I solved that with bandage tape, see pic 3. I would recommend padding a little tape just behind the nail so the meter doesn't become irritating. In the booklet they recommend switching finger after 2 hours, with the padding it is not necessary. I wholehearted recommend this product especially if you have trouble sleeping. I will be doing a 24hr study so I get a view for a whole day. If you are doing long term studies over several weeks then I would recommend using rechargeable batteries as the top of the range Duracell batteries last about 3 days using it 8hrs per day. Whatever you do do not lose the usb lead that comes with it; you can not use any other lead. You must also make sure the lead is plugged directly into the usb port and not into an extension or port replicator/splitter. I have read that it doesn't work with Windows 10 and there are no drivers; if you install the software from the cd or their website it automatically installs the drivers. My system is Windows 10, the video I've posted should prove it works with Windows 10. I'm guessing people are not using the lead provided or plugging the lead into a usb extension, it really needs to be plugged directly into a usb port on the computer with the lead provided otherwise it will not be recognised.

A cheap and cheerful unit with good instructions and recording at a price not much higher than non-recording units. I gave it 3 stars as it's fine for non-recording work but its recording function has infuriated me by repeatedly wiping my data when I've tried to turn recording off (I inadvertently switch recording back on, which stops me from accessing the data I want*). .Additionally, it uses 2 AAA batteries, as seemingly do most of the units in its price range, that make it heavier than the relatively expensive CMS50E that has just failed on me and their life of 24 hours isn't good for overnight use.Sure, you can use it for a sleep study if practice reduces the number of times you lose data, but I strongly recommend that if you're looking for a pulse oximeter to monitor your sleep regularly then you spend a lot more more money. I only bought this as a Prime delivery stop-gap between the failure of my CMS50E and the arrival of a much more expensive sleep-orientated pulse oximeter. It will still be useful as a check against the readings on my dedicated unit.*You need to hold the button down for a few seconds to switch it off and it switches recording back on if I don't quickly release the button after it cycles off; alas, I'm not at my most alert shortly after waking, which is when I want to turn it off, and it's all-too-easy to get it wrong. This is completely unacceptable when being able to access only the last recording means that you lose past recorded data. Although my CMS50E similarly effectively deletes past data when recording is switched on, it requires multiple button presses to turn recording back on and so is almost impossible to do by mistake.

Genuine Contec and works perfectly. Easily slept with it on my finger and batteries lasted a few nights. I had no trouble with deleting the file by mistake in the morning like another reviewer had - I suggest practicing with it first so you can see exactly what it takes to setup and delete. It is all done with either long or short presses of the button.I had trouble downloading at first as the lead looks like a normal micro usb, but I could only get the device working with the lead that came with it.If you have apnea, like me, then the printable graph is very informative.

As finger pulse oximeters go, this seems to be a pretty good budget model for what it offers.I have compared it's SpO2 readings with those from two more basic models and found it to be typically 1-2% less than an Elera-X1 and 0-1% higher than a TempIR-oxy, so generally in the middle which seems reassuring.Uploading to a PC is straightforward enough after the first attempt. Viewing the plots of SpO2 and PR is good, though useful understanding the analysis reports is beyond me at this point, being something of a novice to this subject.Battery usage is quite high. Using two rechargeable AAA batteries, the battery low indicator was flashing after a 9 hour use period. With non-rechargeable batteries, cost could add up quickly, especially if one wishes to ensure a full night's recording, which would generally mean starting each night with a new set of batteries.The main lack I have found in this budget oximeter is perhaps a real time clock as I find myself, when viewing the plots, having to continually translate the time since start of recording to real time of night.Possibilites for buying oximeters with real time clocks seem very limited unless one is to go to specialist medical suppliers and pay high amounts, and the only readily available oximeters for the consumer here in the UK seem to be the various Contec models. Consequently I have now ordered a Contec CMS-50I.