I bought this to assist me in my research to determine the issue with my lower than desired reef tank PH. I wanted to see the correlation also just to keep an eye when we run our fire place. out of the box it gave me some concerns until I read the instructions and conducted the calibration after that the numbers shown what my house security system was showing. I am happy with this unit and it lived next to my reef tank.

I was impressed with the packaging. It came with the usb cable but you have to use your own USB adapter, I let it charge & I followed the steps to calibrate it, which was easy to do. Overall nice easy to use/learn product. I would recommend to a friend

I am a reefer and bought this to monitor indoor co2 as that affect the ph of my tanks. InkBird brand have the best temperature controller in the hobby, so I do not hesitate to get this from them. The screen is bright and clear, with a scale gauge, it is easy to spot the level from across the room. Ever since I received this, I also use to monitor and compare co2 level at different locations at different times of the day.
Now I know the level of my bedrooms as well.
Trying to know when I should open up the windows to circulate fresh air inside!
I should have gotten this earlier. Not this double duties for my hobby and also health related reasons….. so this should be able to substantiate the purchase with my dear wife…

I bought this monitor to decide if I was going to run an airline from outside for fresh air to my skimmer and help the pH in my aquarium. Turns out the room is fine! The cost of this monitor is negligible compared to the money saved. Plus I have peace of mind knowing it is there to make adjustments in the future if things change. Money well spent - would buy again!

I picked this up to monitor what's happening in my houseplants tent. Easy to set up and get going. It's a really nice looking piece as well. It doesn't look like one of the chintzy thermometer hygrometer combos that look like they belong in the kitchen drawer. The battery only lasts about 24 hours with the screen backlight on, but thats OK, because they actually recommend keeping it plugged in while using. I also have an Inkbird humidity controller. I have been very pleased with Inkbird as a whole and this monitor is no exception.

When I first received this CO2 monitor I was impressed with the packaging. The quality of the packaging was similar to what you would expect with high end electronics. It came with the usb cable needed to plug it in but you have to use your own USB adapter, which I’m sure most people have plenty of. Once I let it charge I followed the steps to calibrate it, which was easy to do.
I have no other way to check my CO2 levels but I will say that after calibration I trust it. The temperature and humidity readings match the values listed on my homes thermostat. If I stand near the unit the CO2 raises, if I pick it up and breath into the unit the CO2 level goes really really high, when I took it outside the reading dropped, and after I’ve been away from home all day the reading is lower. All of those are exactly what you would expect it to do. It only has a few buttons for the basic functions of turning the alarm on and off, changing the temp scale from Celsius to Fahrenheit, turning the unit on/off, and turning the backlight off.
My only critiques about the unit is that just off of the battery it will only last about 24 hours with the backlight always on, so if you plan to always leave it on to measure CO2 it will need to be plugged in, or charged daily. The backlight is pretty bright, which is great in a well lit area but it’s a little to bright IMO in a dark room.
Overall if you need to know your CO2 levels (I was trying to decide if I should add a HRV to my homes HVAC) then this unit is easy to setup and the CO2 level is incredibly easy to read. It worked perfectly for my needs.

This is a cool looking little monitor with a very crisp and clear screen that isn't too bright, but can still be read from across the room. The temp is accurate but I cannot verify the CO2 or humidity levels so I'll give it the benefit of the doubt until proven otherwise. I did have to look at the directions to understand all the functions ie. pressing the buttons vs holding down, as they are only labeled with a plus, minus and circle power button but it's easy to follow. It's not exactly subtle, but that isn't the goal. It's a very easy to read, primarily CO2 monitor with temp and humidity thrown in.

If you think you might need this, yes, you do. The inkbirdplus co2 monitor saved me from adding supplemental co2 to my garden, when I never needed it in the first place. I was afraid that I wasn't getting enough co2 and after operating this, I found out that I was having an almost toxic build up of co2. I was wondering why I would feel ill when working in there. Now I know. It's a great unit, with a pretty good track record. Is it the MOST accurate unit you can buy? No. Is it reasonably accurate? Yes. If you think you need one, you do. Just remember to keep the back light turned off (which is easy with the press of a button) if you don't want it to disrupt your light cycle. It powers and charges via usb cable but don't expect the battery to last more than a day or so unless you leave it plugged in. Just remember to turn the little light off when you're done taking you readings. Enjoy!

Came ready out of the box. No instillation or registration needed . Bought it cause having ventilation issues in apartment.

This monitor works perfectly and showed me where I needed to improve with my air quality. This monitor is setting around 45 until I begin smoking in the room. It has really showed me how bad smoking is inside my house. I highly recommend this monitor for anyone needing to know or to watch the air quality inside a room or garden area!! Thank you Inkbird for another amazing product