Indoor air quality monitor with CO2, temperature and humidity, Matter over Wi-Fi, on a light grey background

Indoor air quality monitor with CO2, temperature and humidity, Matter over Wi-Fi

See the CO2, temperature and humidity in the room you are in, and get an alert when the air needs changing.

4.8 from 128 buyer ratings

Works with Matter

Estimated arrival Fri, Nov 6 – Fri, Nov 13 to ChicagoEstimated arrival Nov 6 – 13 to ChicagoAn estimate, tracked from China to your door.
Indoor air quality monitor with CO2, temperature and humidity, Matter over Wi-Fi$101.99
Tracked shippingIncluded
Taxes & import dutiesMay apply at your door
You pay$101.99
or
Questions? Email help@viversio.com. We reply within 1 working day.
Ships from China. That's why it costs less. Tracked from day one.
30-day refunds if it's faulty or not as described, plus your 14-day legal right to withdraw.
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What it does

This indoor air quality monitor gives you the CO2, temperature and humidity of the room you are in. You wake up in a bedroom with the door shut and want to know what is in the air. Historical data shows what the air did overnight, and a sound and light alarm flags a change. It ships from China with tracking.

The monitor reads CO2, temperature and humidity in the room where it sits and keeps historical data, so you can see the current readings and look back at how the air moved overnight or through a workday. A sound and light alarm on the unit flags a change in the room itself. As a wifi air quality monitor, it also puts those readings on your home network.

It connects over Wi-Fi using IEEE 802.11 b/g/n at 2.4 GHz and joins a Matter smart home, so its readings sit with the devices you already control. The unit has a Type-C interface. The casing is PC+ABS, the body is 70 × 103 × 26 mm and the weight is 101 g, so it fits on a shelf or a desk.

It suits anyone who wants CO2, temperature and humidity for one room, with the history to look back on. It does not suit a network that runs only at 5 GHz, since its radio is 2.4 GHz. It has no camera, and video is not part of what it does.

Ships from China with tracking. The estimated arrival range for your country is shown next to the price.

  • See the air in numbers you can check laterIt reads CO2, temperature and humidity in the room where it sits and keeps historical data, so you can see the current reading and look back at what the air did while you slept. A heavy-feeling room becomes something you can check instead of guess at.
  • Get a sound and light alert in the roomThe unit has a sound and light alarm, so a change in the readings is visible and audible where the device sits. Your phone can stay in your pocket.
  • Join a Matter smart home over 2.4 GHz Wi-FiIt connects over Matter over Wi-Fi using IEEE 802.11 b/g/n at 2.4 GHz, so this wifi temperature humidity monitor joins the Matter system you already use. A router that only broadcasts at 5 GHz will not work with it.
  • Small enough to sit on a shelfThe body measures 70 × 103 × 26 mm, weighs 101 g and uses a PC+ABS casing. It runs in spaces from -10 °C to 50 °C and 5% to 95% RH, non-condensing, so a bedroom shelf, a desk or a kitchen counter works.

What buyers say

From people who bought this exact product. Every rating counts in the score, the low ones too.

4.8
128 ratings

Reviews from people who bought this same product, at Viversio or elsewhere.

67 ratings have no written review, only talk about delivery or were filtered as spam, so they aren't listed. They still count in the score.

  1. I have been using the device for two weeks. Great item. Quiet and thoughtful. There is a multi-colored LED that indicates the air quality. Can be programmed to turn off at night, brightness can be adjusted. There is calibration for temperature and humidity readings. There is a sound siren, which can be switched to silent mode. If you blow on it, the readings suddenly drop by 2k for CO2. It also works fine via WiFi, but it's a pity that only its proprietary protocol and its own app are supported. The disadvantages include the LCD screen and the fact that there is no built-in battery, although the latter is debatable. The battery gives an error to the sensors when charging. I would like to see it on electronic ink for better readability. In general, this is not a fly-by-night operation. This is a really high-quality and well-designed device. The cable is almost three meters long; I have never seen such long cables with any piece of equipment. I recommend it.

    O.UkraineBought: SAWF-08P Ships From:China Mainland

  2. I didn't show up in SmartLife app so I downloaded eWelink and all features are working fine. I think the temperatue runs slightly higher than it actually is but there is a calibration feature that a lets you add a contant value to the reading (positive or negative constant). I am still figuring out if the CO2 sensor is off or not, because it never gets down to the 400s, which is what I expect the air outside to be, even after hours with the windows opened. So I still need to bring it to more places and compare. Unfortunately it doesn't have a battery, so it turns off everytime you need to take it some where else.

    A buyerBrazilBought: SAWF-08P Ships From:China Mainland

  3. The sensor seems to work quite accurately; just blow into its openings for a second and the counter jumps above 2500. When I close the windows for a long time, it rises to around 1000, and when I open them again, the counter starts to decrease. It stabilizes at around 550 when I'm in the room, and around 450 when I've been in the room for some time (with the windows open). It works perfectly with Home Assistant, and can be configured in both EWeLink and Home Assistant simultaneously.

    A buyerBrazilBought: SAWF-08P Ships From:China Mainland

  4. A great air quality sensor at an excellent price, delivered in 2 weeks. Can be connected via Matter to different ecosystems, or simply via Wi-Fi in the Ewelink app. The data is displayed accurately. It's convenient that there is multi-connectivity to different ecosystems without resetting the sensor. It's a pity that it doesn't show other air metrics besides CO2, humidity, and temperature, but then the sensor would be more expensive, so no complaints.)

    К.RussiaBought: SAWF-08P Ships From:China Mainland

  5. Excellent station. I used it for CO2 monitoring and automation for the greenhouse. The CO2 measurement seems to be direct rather than mathematical. It integrates correctly with Alice via the Matter protocol, with the ability to create scenarios. An interesting feature is that I was able to integrate this monitor with either the official Sonoff EWelink app or Alice via Matter. It cannot work in two programs simultaneously.

    A buyerRussiaBought: SAWF-08P Ships From:China Mainland

  6. Excellent sensor. The Yandex station mini 3 pro connected via Metter. Purchased for the automation of supply and exhaust ventilation in Turkov. CO2 scenarios are working. Not a very successful design with a fold-out stand and no option to mount it on the wall due to the location of the air circulation holes.

    Я.RussiaBought: SAWF-08P Ships From:China Mainland

Specs

ModelSAWF-08P
MeasurementsCO2, temperature, humidity
MatterMatter over Wi-Fi
Wi-FiIEEE 802.11 b/g/n, 2.4 GHz
MCUESP32-D0WDR2-V3
InterfaceUSB Type-C
Output current1 A
Product dimensions70 × 103 × 26 mm
Net weight101 g
Casing materialPC+ABS
Working temperature-10 °C to 50 °C
Working humidity5% to 95% RH, non-condensing
CertificationsCE, FCC, ROHS
FCC ID2APN5-SAWF08P
  • CE
  • FCC
  • ROHS

Delivery to Chicago

Every step is tracked. The tracking link comes by email, in your language.

  1. Order placedYou get a confirmation straight away.
  2. Packed and handed to the courierTracking number sent to you.
  3. Flies to United StatesThe courier may collect import duties or taxes on delivery.
  4. At your doorEstimated from recent deliveries to your country.

Returns

Plain rules, no small print.

30 days, full refund if faultyFaulty, wrong or not as described? We refund you in full and pay for the return. Start from your order page or email us.
Your legal right to withdrawIn the EU and UK you can also cancel within 14 days of delivery for any reason. That's your legal right. You pay the return postage.

Questions

Is this a wifi temperature humidity monitor as well as a CO2 meter?

Yes. It reads CO2, temperature and humidity together and keeps all three in its historical data, so one device covers those three readings in the room where it sits.

Will this wifi co2 sensor work with my router?

Yes, as long as your router has 2.4 GHz. The radio is IEEE 802.11 b/g/n at 2.4 GHz and the device joins through Matter, so a network that runs only at 5 GHz will not work with it.

What does this co2 monitor wifi model need to run?

It needs a 2.4 GHz Wi-Fi network and a Matter smart home to join. The unit also has a Type-C interface on the body.

Does it have a camera or record video?

No. The unit has no camera. It measures CO2, temperature and humidity and keeps those readings as history.

Why does it ship from China?

We buy from established suppliers in China, and they ship your order straight to you. No local warehouse is why the price is lower. The trade-off is time, so you see the estimated arrival before you pay.

Will I pay anything when it arrives?

Possibly. Import duties and taxes for United States aren't prepaid yet, so the courier may collect them on delivery. Nothing is added to our price at checkout.

Who is Viversio?

Viversio is a brand of Ravinaro LLC, a company registered in the United States. We choose devices from factories with strong track records, and a real person answers every email.

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