SAF Aranet4 Home CO2 Monitor $299.37 Delivered @ Amazon US via AU

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SAF Aranet4 Home CO2 Monitor $299.37 Delivered @ Amazon US via AU

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FiXXXeR on 24/07/2023 - 13:30 amazon.com.au (350 clicks)

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Aranet4 is what you might call the "gold standard" of consumer-grade portable indoor CO2 monitoring devices. Rarely discounted in Australia, this is a time-limited deal for the next few hours that I spotted today on Amazon AU to purchase one via Amazon US. It happens to be the cheapest price ever according to the Camels, also approx ~15% discount compared with the standard price over at CO2Radical.

Why might you want one?
Well as exposure to high levels of CO2 indoors can be linked to poor health - including risk of airborne pathogens - and may even affect concentration/tiredness/cognitive function, knowing what you are breathing indoors could be beneficial by informing you on whether appropriate action (e.g. opening a window, installing an air purifier, masking-up, or just getting the hell out of there!) could be taken to improve it. Cheaper NDIR-sensor devices are available, but most have a much shorter battery life and don't do data-logging.

Here's the blurb from the Amazon listing:
* The perfect companion for indoor environments, allowing you to monitor CO2 levels, temperature, relative humidity, and atmospheric pressure in real-time
* Easy for anyone to use – the color coding and the optional buzzer warns you when the CO2 concentration gets too high
* Power-efficient e-ink display ensures super long battery life for this wireless device (up to 4 years)
* Smartphone app for viewing and analyzing historical data up to 14 days history (supports iPhone and iPad with iOS 12 or later, Android devices with Oreo 8.0 or later, compatible with Bluetooth 4.1 or later)
* Uses nondispersive infrared sensor (NDIR) technology for most precise and reliable CO2 measurements

Price History at CamelCamelCamel.

Electrical & Electronics Carbon Dioxide Monitor Hygrometer SAF Thermometer

24 Jul 2023 4:45pm

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closed Comments

warmfruit on 24/07/2023 - 13:33

Aranet4 is what you might call the "gold standard" of consumer-grade portable indoor CO2 monitoring devices

Is there a budget brand for this kind of thing?
- FiXXXeR on 24/07/2023 - 13:35
  
  +1
  
  Here's a good review from last year on cheaper alternatives:
  https://www.youtube.com/watch?v=Fo2cZiRyokk
  
  Most are only good for "spot checks" though, and not tracking levels over time.
  - jv on 24/07/2023 - 13:46
    
    -3
    
    @FiXXXeR
    
    Is your surname uPPeR ?
    
    I think we've met before….
  - Kaz0551 on 24/07/2023 - 15:14
    
    If they are HomeAssistant compatible… then you just use that for the tracking.
jv on 24/07/2023 - 13:39

-2

Home CO2 Monitor

So this will prewarn you of global warming?
djmm on 24/07/2023 - 13:50

So what happens or what to do when the CO2 gets higher? Stop breathing?
- samfisher5986 on 24/07/2023 - 13:53
  
  +3
  
  In Australia? Generally open a window or a door.
- FiXXXeR on 24/07/2023 - 13:57
  
  +5
  
  I'm sure the others in the room will be most grateful for your sacrifice!
  
  (Or alternatively, you could open a window…)
- jv on 24/07/2023 - 14:19
  
  So what happens when the CO2 gets higher?
  
  Your plants grow better…
Wiadro on 24/07/2023 - 14:20

isnt there like 100 cheaper options
- FiXXXeR on 24/07/2023 - 14:30
  
  +5
  
  Don't mean to be blunt, but I actually did take the time to mention that in the description:
  
  Cheaper NDIR-sensor devices are available, but most have a much shorter battery life and don't do data-logging.
  
  As for CO2 monitors that use cheaper non-NDIR sensors - don't bother, as their readings are nowhere near accurate.
Kibbelhs on 24/07/2023 - 14:23

For that price, I'd expect it to go ara ara~ whenever co2 levels get too high.
Gdsamp on 24/07/2023 - 14:31

-1

Aranet4 is what you might call the "gold standard" of consumer-grade portable indoor CO2 monitoring devices.

hwhy might I call it that
cohiba30 on 24/07/2023 - 14:31

Thanks, Ive been waiting for a better price on this item
Deals For Days on 24/07/2023 - 14:35

+1

As OP has said, most consumer grade ones are bogus with false readings. You can basically guarantee anything under $100 isn’t a real CO2 sensor but probably eCO2 or just fake numbers.

I did some research and found this is basically the only decent consumer option. If anyone knows of models that are NDIR with legit readings, please do share!

As a side note, if you have any electronics skills at all, you can pick up the Sensiron SCD 30 or SCD 40 (also repackage by Adafruit) that is ~$100 (SCD 40 $50 but it would require PCB and surface mount soldering) and use an Arduino/Microcontroller. But, that requires some effort, obviously.

The SCD 30 actually has exactly the same error margin as the Aarnet sensor, FWIW.
- FiXXXeR on 24/07/2023 - 14:43
  
  +1
  
  I believe this model (sold under various names) is surprisingly accurate, provided you manually calibrate it semi-regularly (some reviews say it tries to auto-calibrate, which is NOT what you would want it to do!):
  https://www.aliexpress.com/item/1005003968524974.html
  
  I have one and though it's basic it works fine; and when my Aranet4 arrives it will be interesting to compare their readings.
  - kehuehue on 25/07/2023 - 20:39
    
    let me know how it goes, been on the lookout for a CO2 monitor myself.
Wizard on 24/07/2023 - 15:12

I have this monitor. Paid $355 for it last year. Good price.
tor on 24/07/2023 - 15:36

+3

Here's a DIY alternative; https://www.airgradient.com/shop/#!/DIY-Pro-Kit/p/447362982/…

I've built one of these myself, and it has logging capabilities, and is expandable.
- FiXXXeR on 24/07/2023 - 15:50
  
  That's pretty cool!
Price Jack on 24/07/2023 - 15:59

A methane detector would be far more useful in my house……. for when my mother-in-law or the dog release those silent but deadly emissions just before I walk into a room.
LowRange on 24/07/2023 - 16:09

I have this one from Inkbird it's excellent and very accurate https://www.amazon.com.au/INKBIRDPLUS-Temperature-Relative-H…
- elitistphoenix on 24/07/2023 - 16:31
  
  If only InkBird would sort out their HA integrations/APIs
- fufufu on 24/07/2023 - 17:39
  
  How can you tell it is accurate?
  - LowRange on 25/07/2023 - 04:07
    
    Comparing with another CO2 meter, and with the local weather stations outdoor CO2 readings which i live close to.
shaneiwey on 24/07/2023 - 17:50

+1

Theres 2 of these in an office I work out of for half of my week. They are relatively new and sit next to each other. They come "pre-calibrated". They read 100+ ppm different from each other which is obviously not good. And then when compairing to our $5000 Testo gear (which is calibrated every year) they're again at least 100 ppm off. Make of that what you will considering ambient is around 400ppm and high for a crowded meeting room is 700-800ppm.
- FiXXXeR on 24/07/2023 - 18:07
  
  Calibration can/does drift over time, and if so then you can always manually calibrate. Don't even need the fancy gear: going outside on a breezy day should tell you if it's required for one or both of them; i.e. if you find it to be outside the range of 410-430ppm in fresh air.
dangerdanger on 24/07/2023 - 19:43

One of the reviews : someone uses it "To measure co2 ie covid risk when I'm out".

?!?
- FiXXXeR on 25/07/2023 - 22:01
  
  high levels of CO2 indoors can be linked to poor health - including risk of airborne pathogens

This was posted 1 year 4 months 29 days ago, and might be an out-dated deal.

SAF Aranet4 Home CO2 Monitor $299.37 Delivered @ Amazon US via AU

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