--- product_id: 85875720 title: "Air Quality Monitor, GEARDON Accurate Testing Formaldehyde(HCHO) Detector with TVOC/AQI/Temp/HUM Test Data Monitor, Air Quality PM2.5/PM10 Meter Multi Testers" brand: "geardon" price: "FREE" currency: TND in_stock: false reviews_count: 8 url: https://www.desertcart.tn/products/85875720-air-quality-monitor-geardon-accurate-testing-formaldehyde-hcho-detector-tvoc store_origin: TN region: Tunisia --- # Air Quality Monitor, GEARDON Accurate Testing Formaldehyde(HCHO) Detector with TVOC/AQI/Temp/HUM Test Data Monitor, Air Quality PM2.5/PM10 Meter Multi Testers **Brand:** geardon **Price:** FREE **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** Air Quality Monitor, GEARDON Accurate Testing Formaldehyde(HCHO) Detector with TVOC/AQI/Temp/HUM Test Data Monitor, Air Quality PM2.5/PM10 Meter Multi Testers by geardon - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/85875720-air-quality-monitor-geardon-accurate-testing-formaldehyde-hcho-detector-tvoc) ## Best For - geardon enthusiasts ## Why This Product - Trusted geardon brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Full description not available ## Images ![Air Quality Monitor, GEARDON Accurate Testing Formaldehyde(HCHO) Detector with TVOC/AQI/Temp/HUM Test Data Monitor, Air Quality PM2.5/PM10 Meter Multi Testers - Image 1](https://m.media-amazon.com/images/I/61nBcillj4L.jpg) ![Air Quality Monitor, GEARDON Accurate Testing Formaldehyde(HCHO) Detector with TVOC/AQI/Temp/HUM Test Data Monitor, Air Quality PM2.5/PM10 Meter Multi Testers - Image 2](https://m.media-amazon.com/images/I/61afHk9IN1L.jpg) ![Air Quality Monitor, GEARDON Accurate Testing Formaldehyde(HCHO) Detector with TVOC/AQI/Temp/HUM Test Data Monitor, Air Quality PM2.5/PM10 Meter Multi Testers - Image 3](https://m.media-amazon.com/images/I/61U-08y4XpL.jpg) ![Air Quality Monitor, GEARDON Accurate Testing Formaldehyde(HCHO) Detector with TVOC/AQI/Temp/HUM Test Data Monitor, Air Quality PM2.5/PM10 Meter Multi Testers - Image 4](https://m.media-amazon.com/images/I/61DTPQdqDZL.jpg) ![Air Quality Monitor, GEARDON Accurate Testing Formaldehyde(HCHO) Detector with TVOC/AQI/Temp/HUM Test Data Monitor, Air Quality PM2.5/PM10 Meter Multi Testers - Image 5](https://m.media-amazon.com/images/I/61b7E3LcJ5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works well. (Update) still working two years later *by I***N on Reviewed in the United States on November 12, 2018* Update 10\17\20.Two years later and sadly, each summer and fall I pull this piece of kit out and monitor the air quality. It still works well. It is accurate within +/- 5 PM 2.5 ug/m3 (measured against the nearest purple air sensor). Would buy again.Original review:Live about 100 miles from the Camp Fire in California. Used the meter to gauge outside air quality vs. indoor. Outside was measuring at 240 PM 2.5 ug/m3. Then i measured inside the house. I thought the house would insulate on its own. I was wrong. Though not as high as the outside measurements, the house still needed air purifiers. After a few hours with the air purifiers running, indoor measurements were down to 19 (very good).This meter helped us to make an important decision to invest in air filters for our home.It was a very worthwhile investment.The white stuff on the meter in the photo is the ash from the forest fire. Everyone stay safe. Support our brave Fire Fighters! ### ⭐⭐⭐⭐ Seems quite accurate. *by M***S on Reviewed in the United States on November 24, 2018* I have done some simple testing of PM 2.5 with visibility and other PM measurements. Also by turning my HEPA filter on and off in my rooms, and the meter seems accurate. I have discovered that to turn the monitor off it is really necessary to hold the on/off button down for 3-4 seconds. If this is not done, the monitor will go into a standby mode and continue to drain the battery even though the screen is off. ### ⭐ Defective and disappointing *by J***P on Reviewed in the United States on November 21, 2018* This arrived in a scuffed box with mild abrasions on the device itself that made me wonder if it had been previously returned. The temperature gauge is wildly inaccurate (by up to 20 F), and inconsistently so. Moreover, the screen has several manufacturing defects, and the battery rapidly drains. It’s going back. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/85875720-air-quality-monitor-geardon-accurate-testing-formaldehyde-hcho-detector-tvoc](https://www.desertcart.tn/products/85875720-air-quality-monitor-geardon-accurate-testing-formaldehyde-hcho-detector-tvoc) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-23*