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michael
Bewertet in den USA am29. Januar 2025
Very easy to operate with large numbers.
Mr_D
Bewertet in den USA am26. Januar 2025
This meter has better quality than 90% of the items we see from China.The housing feels durable and has a good grip texture to it.It can be calibrated but was close enough.It says "Explosion proof" . No, it is not. It's plastic.The LCD cover is plastic and can't take high temperature, fire, explosion or significant impact.It says "Waterproof". No, it's not.I'm not complaining about it, just setting the facts straight vs what the book says.There's a small effort with a rubber flap over the USB port but that has no real seal on it.The O2 sensor doesn't appear to have a seal around the sensor perimeter.The 3 LED indicators have no seal around those.The plastic case fits together firmly but it's not sealed and has no O-ring.It's not waterproof but is well made. It's basically rain/drip-proof for 5 minutes and that's fine.The charge circuit only understands 5V rates on USB (no fast charge 9V, 12V) but works fine and charges at a decent 500mA hour rate on 5V. It flashes the lights to show that it's charging.Fast Charge 3.0, 20V fancy rates ? No.But, it works fine and the 500mA rate at 5V will charge that size battery in 4 hours.Some things could be better such as:The back light goes out very quickly so most of the time it's out and can be hard to see the grey LCD on a grey background.The LCD cover is somewhat reflective which doesn't help.It'd be easier to read if it had durable, anti-reflective glass like cell phones have instead of plastic but it will do the job.It has a very old mini USB style charging port design from 25 years ago.Those cables are getting hard to find and not a good idea.The battery is an internal 2000mAHr 3.7V battery pack that plugs in so it could be replaced if needed.The battery has a small circuit on the side probably for over-discharge protection.Using ONE 18650 battery at 3.7V may have been a better design and those are easily available but they went with a square battery pack with 2 wires on it since it's flatter.It says the sensor has a 2 year lifespan. That's pretty short for a test instrument. Not ideal.The menu is system is not great but can be made to work after starting over a few times.Usually we won't need to use the menu after it's setup.It has plenty of quirks but the main functions and alarm works ok and it respond quickly.It functions in warm or cold air temp (tested to 0F) and it read the same. 20.9%It's better made than most products from China and appears adequate.
Simon B
Bewertet in Großbritannien am 24. Februar 2025
Item title: TopTes Guard-756 Upgraded O2 Detector, 0.5S Fast Response, Handheld Oxygen Detector with Vibration, Visual and Sound Alarms, Rechargeable O2 Monitor, Dust and Explosion Proof, for Work, Home - BlueDelivered price with Prime: £44.99My comments and opinion: I’ve been using the TopTes Guard-756 O2 monitor for a few weeks now, and it’s proven to be a solid device. The quick 0.5-second response is great for safety, and the alarms (vibration, sound, and light) are helpful. It’s easy to carry around with its back clip, and the 7-day battery life is convenient.The build feels sturdy, and I appreciate the waterproof and explosion-proof design. It’s a good option for anyone needing a reliable oxygen detector for work or home use.
Jordan E
Bewertet in Kanada am 13. Januar 2025
I was a bit sceptical when I requested this Oxygen Monitor but upon receiving and doing some preliminary testing I must say that I’m quite pleasantly surprised with both the build quality and responsiveness/accuracy of the TOPTES Guard-722 Oxygen Detector.It comes in a very compact case that is of decent quality and will serve to store and protect the detector. The clip on it is of good design and quality and ensures a very secure hold onto whatever you are affixing it to.THE UI is very user friendly, and the preset alarm parameters are in line with Health & Safety regulations/guidelines here in Canada. I have not tested its explosive resistance, lol, but it definitely feels like an incredibly robust build.I tested this alongside an established and known brand, and new, it performs equally as well. I will have to update if any issues arise concerning longevity or continued accuracy of the sensor but at this point this seems like a high quality product.The fit and finish, as well as the display quality on this unit are all fantastic. All alarms work very well; the audible is sufficiently loud, the haptic is strong and would be hard not to notice, and the visual (red lights on face of unit) are bright.I do wish that it charged by USB-C but as it is an entire unit in a case altogether I can forgive it that one shortcoming.For my uses this will be more than adequate and it will definitely get lots of use.
ＳＳ
Bewertet in Japan am 12. Februar 2025
操作は結構簡単です説明書も日本語対応です単純な仕組みなので、初心者でも問題ないと思いますただ、ペットの酸素室の濃度を測るために買ったが、３０％までしか測定ができない。うーーーん、これは完全に自分の確認ミスですが、せめて５０％くらいまで測定出来たら最高なんだろうなぁとなので、ペットの酸素室の酸素濃度測定には適してませんのでご注意を
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