Portable CO2 meter and data logger with battery and good CO2 sensor inside.
The only really wrong thing about this device is it always show temperature higher than it is for about 2°C (for example 28.0°C instead of 26.0°C) and it is not something related to wrong sensor placement.
- 20h work from a battery
- LCD Color zoning
- Setup time and alarms from PC
- Sensair S8 CO2 sensor
- Incorrect temperature measurements
- No time and date on the screen
- 30 sec warmup time
Continue reading “XINTEST HT-501 CO2 Meter”
uHoo – most advanced air quality monitor, at least if consider a number of sensors. Including advanced sensor like CO, CO2, PM2.5, VOC, O3, NO2. And also traditional like temperature, humidity, and air pressure. Measurements look accurate enough.
The device does not have any local indicators. Not a single color LED to show air quality status. The only way it communicates with the world is Wi-Fi and mobile application. The application (v 3.8) or backend infrastructure that makes it work is unfortunately unstable. Also, an interface is poorly adapted to iPhone X.
uHoo is not portable due to many reasons like no local indication, no battery, need Wi-Fi (and new connection setup will take time).
Continue reading “uHoo”
Long time no Samsung. 🙂 Mostly because of the previous experience (read in Russian). But anyway did a test of Adaptive Fast Charging (AFC) from Samsung. Using Samsung S8 with AFC charger from the box.
What can I say?
I see some cheating with charging percentage displayed by the phone to get “Full Charge in 90 minutes” in reviews.
But the real numbers are more like 120 minutes.
Just to compare with a device that shows true percentage see image below
|Apple iPhone 8 5v 12W charger
|Samsung Galaxy S8 AFC
One of the oldest devices I got for CO2 monitoring is AZ-7788 GreenDay. It is 4 years old now. The device is still good and accurate.
Used as portable mostly because it has an LCD and not require setup.
Continue reading “Green Day CO2 Monitor”
First 4K/GPS/WiFi Dashcam on market.
Metal body looks good. Device is releatively heavy. Weights distribution and center of mass are not perfect and it sometimes affects image quality (right side vibration). Compatibility with 412GW GPS connector (make upgrade easy and fast). A touchscreen is much better than sensor buttons on 412GW. A physical power button is also good. What is absolutely wrong about this dashcam is Wi-Fi speed. View of any HD video impossible. Copy 1 minute of 4K video (340MB) is taking so much time (more than 10 minutes) that my 3 attempts to do that failed for different reasons. Wi-Fi is only usable for preview of Low-Resolution files (if enabled)
- 4K or 1440/60p
- daylight video quality
- removable CPL filter
- timelapse and parking mode
- speedometer screensaver
- slow charging (2h, 5v 0.15A)
- Wi-Fi is slow beyond acceptable level
- Video quality at Night (due to CPL?)
- not removable “NextBase” logo
- Accumulator 3.7v 280 mAh 1.04Wh
- SoC (CPU): Ambarella A12S75
- RAM: 512 MB DDR3L 1866
- ROM: 256 MB NAND Flash
- Sensor: SONY EXMOR R CMOS
Continue reading “NextBase 612GW”
Yet another USB Tester with PC/MAC connectivity. This time using Bluetooth.
Application is old-shool and simple. It cannot resize to use full screen, cannot autodetect port to use, cannot show large graphs.
Continue reading “UM24C”
iPhone X got 1.5 times increased battery capacity in compare to iPhone 8 and now there is some difference appear in charging time using 12W and 29W Apple chargers. Also, standard USB port now charging more than 6 hours.
|PC Port USB 2.0
|Apple 5W charger
|Apple 12W charger
|Apple 29W charger
Continue reading “Charging iPhone X”
Nice device to investigate charging issues. See how fast charge works. Investigate power consumption of different devices in different usage mode.
It has PC Software that creates nice charging trends. That is what makes it different from most of USB Meters.
Continue reading “Chargelab Power-Z KM001”
Using iPhone 8 with iOttie Qi Wireless car charger.
Use iOttie charger for about a month. I would say it is nice that there is no need to plug in cables any more. What is not that great is iPhone wireless charge speed. It is slow.
Continue reading “iOttie wireless Qi with iPhone 8”
Charging iPhone using different chargers. Results time depends on charger a lot. Starting from long 4 hours charge using standard PC USB port with 5v 0.5A. Ending with 1h 40m using Apple 29W type-c charger with USB PD 14.7v 2A. Despite 29W charger is actually the best one it cost too much to use it as iPhone charger – 75$ (charger and cable). There is other option available for fast charge iPhone. Apple 12W iPad charger with 5.1v 2.4A. It is only ~20$. Same 1h 40m for 100% charge.
Fast charging is actually happens only when battery is more or less empty. Charging from 80% to 100% may take same time that from 0% to 80%.
See charging current and voltage details on graphs below for all types of chargers
Continue reading “Apple iPhone 8 charging time”