Price: $99.42
(as of Sep 22, 2025 13:42:33 UTC – Details)
Product description
Problems with allergies?
See when you may need to change your home’s air filter. Watch the levels of formaldehyde and VOCs drop when the windows are opened. Learn where air quality is poorer and where your allergies can worsen. Allergies that are difficult to control with unexplained coughing, runny nose, and shortness of breath may indicate sick building syndrome.
Have you gone nose blind to household odors?
Check multiple measures of your home’s air quality. This air quality monitor has a fan onboard that allows REAL-TIME accurate monitoring of formaldehyde (HCHO), total volatile organic compounds (VOCs), and <2.5 micron-sized fine particulate dust (PM2.5).
Formaldehyde is an environmental carcinogen yet odorless at lower concentrations that can off-gas from various building materials. Detect low levels of airborne organic compound and odors or VOCs emitted from biologic and synthetic sources such as plastics not perceivable to the human nose. Check microscopic inhalable dust levels with PM2.5 levels.
Technical Specifications
LCD Display 2.8” 320 x 240 pixel LCD Battery Capacity 2200 mAh Li battery Power Source DC 5V micro USB charging HCHO Range 0 – 1.999 mg/m³ TVOC Range 0 – 9.999 mg/m³ PM2.5 range 0 – 999 μg/m³ Product Dimensions 150 x 70.8 x 43.6 mm Product Weight 188 g
Tips on Use:
Large variations or 9.999 TVOC readings do not indicate an error as this instrument is a sensitive electronic nose; environmental TVOCs vary much and high TVOCs often can result from interference from benign fragrances or odors.Calibrate if 0.000 indoor readings noted or with new device.Adjustable alarm for various HCHO levels and auto-shutoff timing (up to 2 days)As the only US based retailer of this item, we have a chemist on staff to answer any technical questions.
MULTIFUNCTIONAL & SCIENTIFIC – This indoor air quality monitor accurately assesses multiple measures of air quality including concentrations of formaldehyde (HCHO), total natural & synthetic volatile organic compounds causing most odors (TVOC), and fine particulate dust matter measuring <2.5 microns in size (PM2.5) which travel deeply into the respiratory tract, reaching the lung alveoli and can worsen asthma.
PORTABLE TESTING – Spot check indoor air quality anywhere or leave device on for continuous monitoring up to 2 days. This easy-to-carry air quality tester can help monitor air quality at home, in the car, and in hotel rooms. The 2200mAh battery provides portable power when DC 5V micro USB charging is not available. Information is displayed on a clear 2.8” color LCD display.
ADVANCED FAN & SENSORS – This air quality monitor has a built-in fan to quickly draw in ambient air to allow REAL-TIME measurements. It incorporates a laser sensor to measure levels of dust particles and has a second electrochemical semiconductor sensor to measure formaldehyde and natural/synthetic organic compound levels.
HEALTHY HOME? – Is your family suffering from sick building syndrome? This air quality tester detects organic compounds like formaldehyde which has suspected links to nasal cancer and lung cancer emitted from many household materials. By measuring particulate pollution, an air pollution monitor can also help you know when asthma may worsen and when to change your home’s air filter.
ORIGINAL DESIGN & USA BASED SUPPORT – We have Midwest-based technical staff including a chemist to answer any questions you have. Also included will be a 20+ page eBook on Gas and Air Quality Hazards. We have worked with the supplier that holds this air quality detector’s design rights so you can be confident this item is tried and tested.
Customers say
Customers find the air quality monitor to be a high-quality device that’s simple to use and easy to set up, helping detect HCHO polluting sources. The device provides fairly accurate readings and records air quality with accuracy. However, customers disagree on the functionality and value for money, with some reporting it stops working and considering it not worth $100. Moreover, the battery life receives mixed feedback, with several customers reporting issues with battery charging.
The Skeptical Shopper –
Works fine and doesn’t cost a whole lot
I was suffering where I work – it is a really small company and the ventilation is never very great and sometimes just bad, and the air gets stale and carries various stink and polluting materials and the wrong temperature and too humid or too dry – I bought it to give some sort of objective view, and backup to my whining and my resulting bad behavior! … It seems to have given me some peace of mind, a little bit. Obviously the owner wants to save money by letting in just a minimal amount of fresh air. The HVAC system seems not to have been developed by the greatest of engineers …So I bought this and it does apparently work fairly well!I wish that it could have a way to NOT show a big bright yellow or green smiley face or frowny face, because that made some people think it was to test your breath, or tell if you were drunk, or whether it thinks you are pretty (I think they thought there is a camera on it)My greatest fear about it is that I will leave it out and then someone will take it and then I will never see it again, but there is no way that anybody could build a thing that would not have this problem. Some kind of bicycle lock for it maybe ???For a design idea, i thought maybe it would be smart to allow the user to specify a session for data recording – make it so I can tell it i’m going to leave it out for 20 minutes or 8 hours, and please keep a record of the average every 5 minutes or every 30 minutes or whatever – it might be tricky to make it usable – something like a microwave keypad or just choosing from a list of intervals maybe. The way I used it in lieu of this was just to glance at it periodically and take a photo of it with my cell phone camera. Also obviously writing it down in a notebook would be easy.I noticed whenever I turn it on it shows high readings at first if it has not been turned on for a while, because of the plastic case making some kind of measurable gasses. But it can detect the difference between fresh outside air and stale inside air.It helped me also at home because I turned it on in our bedroom and it showed high formaldehyde so now I realize it is good to run our filter or leave the window open a crack.One downside to the sharp edged 1.0 detection level is that it seems to think 0.95 is just really completely fine and I suspect 0.95 is almost as bad as 1.05 but the readout looks completely different emotionally then. I doubt the 1.0 level should really be that significant.I noticed acetone nail polish remover seems to affect the formaldehyde reading. I didn’t find that to be a big issue but it could be confusing to try to diagnose what is going on in a nail salon if the user doesn’t realize it.I would have preferred a carbon dioxide reading also but apparently from what I read the air would have to be really extremely stale in order to see a reading that would be a medical issue. But I have read if it is about 800 parts per million (double what is in the air) it can start to make us humans sleepy and make more mistakes. But it would have doubled the cost of the detector or more, since it requires a complicated chamber with a special detector electronics in it.Hope this helps!
Reviewer –
Not accurate especially with worse air quality and follows China standards chart not US
** Update 12/8 ** I’ve updated from 2 stars to 4I had to post an update because of the amazing customer service.. it wasn’t immediate but it was efficient. I honestly didn’t expect much at all and was planning on returning my device. I did not and here’s why..I purchased during the CA wildfires so I could not calibrate the device and it was inaccurate. So, if you are buying during bad air quality outdoors it will not be accurate, though will still show you if things get better or worse until you can.Once I calibrated to the “fresh” outdoors a couple weeks later when our “hazardous” (worst in the world) air became “fresh” I could spend more time working on calibrations.. it took several attempts and did this over several days (2 weeks) in an effort for consistency. I did have to adjust manually but the online eBook was helpful through the process.I’m not sure I totally believe all of the HCHO are totally accurate as I know some essential oils that actually aid in respiratory health and if nearby will set the monitor off, then dissipate over 10-30 min and the machine is happy again. So, some things heavier than air will register.. know what is nearby and make your own conclusion as to your safety of the air.The PM2.5 which is huge for CA wildfires and to me, with a respiratory medical disability is most important. It is quite accurate though once you finally calibrate. Because of the time it took me to calibrate and believe the unit, I didn’t want to return the unit. What I found out was that it’s difficult to find machines that will show US guidelines so you will get a green, yellow, or red face on your machine. Just know, it is still green when it should be yellow/orange in US guidelines. I was willing to keep the unit for a discount for all of these difficulties and the company came through and compensated me more for my troubles.I’ve upped my rating from 2 to 4. My reason for not a full 5 is because of the time to actually get things working as they should and the fact I basically have the US standards memorized, I can’t always count on the happy green smile to be good for my own health. The readings however, are pretty much dead on now (outside) with EPA reports. I do believe your results will be accurate, however you may need to decipher them to US standards or your own personal sensitivities. The company is very receptive to questions and offering a response.—————————————————ORIGINAL POSTI purchased this during the CA wildfires when the air quality was in the “Purple/Hazardous” zone on the US charts (see my last photo for US PM2.5 values). Our air quality PM2.5 was over 300 ug/m3 but this tester showed a yellow “poor” face. Since you can’t calibrate it indoors, I had to wait 12 days to get a good air quality day. I’ve recalibrated the machine at least 5 times. The time apparently resets each time you do this too so the time is always back in 2015.I give the unit 2 stars because after calibrating is is moderately accurate. Not enough to use to measure actual air quality standards, but it will fluctuate when put near harmful products enough to know there are VOCs around. The fact it tests for formaldehyde is cool too, but I’m not sure about the accuracy as it jumps from green to poor and back for no apparent reason.Photos in order:The first photo is show what my unit looks like purchased at $109. I clicked in the link to review earlier today and this model ( https://www.amazon.com/dp/B074FTVHFN/ref=dp_prsubs_1) showed up with all the same reviews and comments as the model I have. Hmm As I review this afternoon, the image again shows my model purchased. Just be aware what you are purchasing.Second photo is after all of my calibrations on another day the PM2.5 was reported by the EPA here as 57 which is unhealthy. The unit read 54, not too bad. The PM10 was off considerably. The biggest issue I have is that after reading the manual, I finally realized why the unit kept saying “normal” when it was “unhealthy” by US standards. The unit goes off the China air quality chart (see photo 4 from manual). Photos 3 and 4 show air quality taken at the same time as the monitor indicated in photo 2. For this reason, the unit is not useful to me as someone with respiratory issues that needs the US air quality results. See last photo 6 for US standards chart and compare to what you will actually see with the unit on photo 5 China standards chart.It’s just too far off for me and I’m not going to figure it out on my own, though one could. I contacted the seller 3 days ago as their email said to do that before posting a negative review but have heard nothing back. My request was asking how to change the unit to US standards if it’s possible at all. If that can’t be done, I will be returning it. I’m hoping this review will prompt a response, otherwise the unit is going back.
lrch –
Las lecturas de PM 2.5, PM 10, PM 1.0, temperatura y humedad no concuerdan con los valores verdaderos. En la calibración manual se puede ajustar la sensibilidad del sensor de PM 2.5 hasta mas menos 33%, pero en el equipo que recibà no fue suficiente. El otro ajuste disponible es básicamente sumar o restar un valor constante y se puede lograr que la lectura concuerde con el valor real, pero al poner una muestra de aire con PM=0 en vez de indicar cero muestra el valor que se sumó o restó. No hay ajuste de sensibilidad para la temperatura y humedad, sólo se puede sumar o restar un valor constante a las lecturas.No tengo medios para verificar si la lectura de concentración de substancias volátiles es exacta.Es posible que se trate de un defecto de fábrica, pero decidà pedir un reembolso en vez de un remplazo
Geof Sims –
There was nothing I disliked about this….Once calibrated, it showed me that I had a big problem with my air quality due to VOCs from an item I had purchased .. I removed the item..I removed the problem…not confused, headache gone, coordination back to normal, asthma clear…if in any doubt as to what you’re breathing is safe…GET ONE…I was a novice in these matters…this cleared my mind and also my breathing.. EXCELLENT
aaron –
I purchased a few different models from Amazon and had to send them back because they were so in accurate. This model has a fan which draws air across the sensors making the instrument respond faster to changes in the air. Iâm a certified master inspector and use this as part of a preliminary air quality check. I would definitely recommend this product. As with any tool the user needs to understand how to use it and the principles behind what they are measuring.
Gary Kennedy –
I have never bought or used a product like this before, so this review is only relevant to this being my first air quality monitor.Having said that I have no reason to ‘disbelieve’ the data it’s presenting to me.I bought this after being hospitalised due to a rare bacterial infection which, possibly coincidentally, occurred after I had removed some tiles in my bathroom after spotting a leaking toilet seal.For peace of mind, once I had returned home, I thought I’d buy an air quality tester to see the state of the air quality in my flat.I’d already covered the open tile area with pvc sheeting. The air quality in various rooms, including the bathroom area, was of good quality. I placed this monitor inside the pvc sheeting (and re-sealed it) to see what it said about the air there (that had been open prior to my hospitalisation). It came up as ‘unsatisfactory’ – which may have been the cause of my illness.I would say this gives you peace of mind if you suspect the air in a room is not of acceptable quality, or gives you the evidence to take corrective steps.After replacing the tiles and re-grouting the bathroom that had the missing section, the air quality is reading ‘good’ again.I would recommend this to give an indication if something may need further investigation.
xiangxiang –
Firstly, concerning the accuracy, I am uncertain about how it is supposed to function. Each time I power on the machine, it requires calibration, and this process entails leaving the machine outside for a few minutes. If it were a one-time requirement, it would be acceptable, but the initial calibration process takes an unusually long time. The frustrating aspect is that this occurs every time you open the machine. Who has the time to consistently place the machine outside for calibration whenever they wish to check the air quality?Secondly, on their webpage, it is stated that returns are accepted within 30 days. However, when I requested a return on January 1st, it was rejected. After ongoing arguments, they responded on January 7th, claiming that it was already beyond the 30-day return period. Isn’t the issue that they consistently rejected my request, prolonging the process until it expired? From the seller’s perspective, this is absolutely unreasonable.Moreover, everything is in Chinese, posing a challenge for those who do not understand the language. Additionally, they essentially do not permit returns unless there is a product failure; dissatisfaction with the product is not considered a valid reason for return. Consider this a cautionary note about the product.