HDS272S Oscilloscope, Handheld Oscilloscope Multiumeter 70MHz Bandwidth 3 in 1 Portable Waveform Generator with 3.5" LCD for Automobile Maintenance, Electronic Measurement

I took a chance with the 40mhz version and I am extremely happy with this unit. It's super portable, accurate, and easy to use. Perfect for field use. Doesn't have as many features of bench tops, but that's not it's point. Pitted against my certified calibrated Fluke 789 (voltage accuracy test), this thing is on the mark accurate. As stated by others, when in auto range, it's slow to settle, but when locked in a range, it's nice and snappy. This will perform just fine for troubleshooting in the field, mainly for discovering intermittent DC voltage drops/issues with industrial equipment and sensors (something DMMs can't do). Although the DMM test leads it comes with are worthless, those are easily replaced with better built leads. The probes are good, no picture but it performed well when connected to my signal generator with a 1-40Mhz sweep, begins to struggle a bit above 35Mhz, but that's beyond the scope of my needs for it in the field. Although it's ability to survive an industrial setting is yet to be determined, I'll take my chances and just treat it with care.For the price you can't beat it.

This is really a handy scope being battery powered no need for isolation transformer.It took a little bit of use before i got used to the settings menusFunctionality:portable and accurateFeatures:the signal generator makes this easy to use and one less piece of test equipmentBattery life:it has a 21700 battery bigger than others

Just got the unit and unboxed it, and fired it up. tl;dr at the end.This is my review of the particular 'kit' I purchased that came with some extra probes.What I got was:a) The HDS242S scope - 2 channels 40MHz + signal generatorb) 1x/10x probe with adjustment screw at the solid BNC connector + bag of adjustment tool, tips, color ringsc) 1x/10x probe with adjustment screw at the probe end w/ slim plastic BNC connector + bag of adjustment tool, tips, color ringsd) two metal BNC to alligator clip leadse) a red/black pair of configurable leads where you screw on your choice of item to the two ends of the leads. Included ends: needle screw on probe (x2), needle screw on bare ends (x2), bare banana post screw on (x4), bare screw on fork spade connector (x2), red and black covered alligator clips (x2 each color) - so you can built some custom ended cables for use with the multi-meter function.f) USB A to USB C charge cableg) USB A DC power supply block to plug into mainsh) pair of multimeter probes - vinyl covered I think.i) BNC to BNC cablej) manuals and soft sided zip caseGood:1) The display is nice and bright - have not tested it outside in the sunlight yet.. that is tbd2) Boot up and shut down time are nice and quick.3) The compensation of the probes was easy and they were nearly perfect, if not already dead on.Annoyances:4) The adjustment of scales and triggering source/setting are a bit odd, given its all done over push buttons that server multiple purposes - but once you use it a few times, I think the process will be much easier.5) There is way too much stuff to fit in the box. With just 2 oscope probes and the 2 multimeter leads - the soft box is almost full. Keep in the webbing front the adjustment screwdriver and the BNC-BNC cable for use with the function generator, and the USB-A to USB-C charging cable, and there is little room other 4 leads nor the mains-usbC charging adapter. So if all of the stuff (a-j) much of it just wont fit in the storage box... so it’s really too much, as you have to store the other bits somewhere. As a result just storing the the leads and scope in the soft side box on the bench left a scratch in the screen where a metal part of one of the many things in the box rubbed against the screen (see photo).6) The manuals won't fit in to box - ok, give you have to store all the extra junk somewhere its not a huge deal, but would be nice, if the manual was just slighly smaller or better the box was slighly larger, so the manuals would fit in the bottom (and maybe even all the extra stuff).7) the stand folds out with a hard crack sound on the plastic - and it is felt through the unit. It “feels” like the thing could break. However this is only the sharp plastic edge that is the lock pivot point. And if you own and close the stand a few dozen times, then that sharp edge gets worn rounder and the had “crack” goes away and becomes a looser smoother click and works well (see photo of the area). So this can be fixed.Problems:8) The two probes are different - the one that comes with the scope vs the added one my seller packaged in to ensure there are two scope probes in the kit (as its a 2 channel scope). Problem is the 2nd probe's BNC end is cheap and too tight - pulling it off of the scope takes way more force than I'd expect - you worry if you are going to wear out or break something. It will likely wear in, but I'd rather have had less of the extra odd stuff ( like skip the configurable leads - item e) and instead just gotten packed in another like higher quality probe.9) Because the probes are different, their pointy probe ends are actually slightly differently sized - such that the yellow special tips to center or to shield the tip (if the hook cover is removed) - do NOT fit on the other probe. You cannot get the slightly smaller diameter covers on the slightly larger probe, and the slightly larger cover will not hold on the slightly smaller probe tip. That is really sad - that there isn't enough production tolerance control in the factories that make these to be ensure these common parts are all make to the same sizes.10) questionable component quality control and lack of web support - unable to even check what the current firmware version is, which is a red flag that any software issues in the unit won’t be fixed and updated ( like the annoying lag in auto ranging locking in on a value , while changing values are displayed so your never sure if the value shown is accurate).Additionally one of the clips with the unit came badly assembled / bent (see photo).tl;dr;In trying to differentiate from the many sellers of this owon scope/meter, they bundled in too much in cheap probes. Just having bundled in one additional full quality scope probe might have been enough. And Owon made the padded box too small for what it effectively needs to store.With the damaged new lead tip , midsized probes and their accessories , too small box and lack of suooort in returning it after a 2 days - hoping Owon will update the units with a new revision that fixes the issues.

This is a fantastic portable do-it-all device. I purchased the Hds272s. The scope is accurate in my testing to +/-0.16% frequency, and +/-2% voltage. These are at some of the most difficult cases within spec: high frequency (50Mhz) and low voltage (200mV). I don't need more accuracy than that, although I understand a lot of people might. You won't do much better than that in this form factor, though.Addressing one of the complaints I see in the reviews, the auto set for the scope IS somewhat slow, around 1-2 seconds. Not as bad as the other reviews made it out to be, though. Once again, I don't need it to be faster than that, but if you're someone who takes a lot of measurements at different scales that could be more of a problem for you.The one serious complaint is the shared ground between the oscilloscope and USB port. If your reference ground is not earth ground, this could cause serious damage to a computer plugged into the port or to you if you touch it. There is a dust cover that prevents contact with the port while closed, but isolation would've been appreciated.The case is good, but doesn't have enough room to hold all of the accessories that come with the scope. That's fine with my setup, I also carry a case of multimeter cables separately. I'm able to fit two probes, one BNC-alligator, the BNC-BNC cable, the USB-C cable, and the USB adapter in the case - everything I'll need to use the AWG and scope features.The multimeter has a fused ammeter, an advantage over the competition in this space. It lacks induction measurement, but otherwise meets what I'd expect from a basic multimeter. It lacks some of the other functions of my primary meter, such as temperature measurement and NCV, but you aren't buying this to be a multimeter.Overall, I highly recommend this if you need a portable scope (or even just a basic scope in general) as long as you understand its limitations and the safety implications of the common ground.