--- product_id: 49256462 title: "CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter" brand: "gain express" price: "$390.10" currency: USD in_stock: true reviews_count: 13 category: "Gain Express" url: https://www.desertcart.us/products/49256462-co2-meter-handheld-co2-monitor-9999ppm-measuring-range-carbon-dioxide store_origin: US region: United States of America --- # Humidity 0.1~99.9% ±3%RH CO2 range 0~9999ppm ±5-10% Temp range -10~60°C ±0.6°C CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter **Brand:** gain express **Price:** $390.10 **Availability:** ✅ In Stock ## Summary > 🌬️ Breathe smarter, work better — your pocket-sized air quality guardian! ## Quick Answers - **What is this?** CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter by gain express - **How much does it cost?** $390.10 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/49256462-co2-meter-handheld-co2-monitor-9999ppm-measuring-range-carbon-dioxide) ## Best For - gain express enthusiasts ## Why This Product - Trusted gain express brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Portable & Practical:** Ergonomic handheld design with manual calibration ensures you stay in control wherever you measure. - • **Precision Air Insight:** High-accuracy NDIR sensor delivers reliable CO2 readings up to 9999ppm for confident indoor air quality management. - • **Dual Power Flexibility:** Runs on 4 AAA batteries or optional 9V adapter, so you’re powered up for any environment. - • **Essential for Healthy Spaces:** Ideal for offices, classrooms, and public areas to optimize ventilation and safeguard wellbeing. - • **All-in-One Environmental Monitor:** Simultaneously tracks temperature, humidity, dew point, and wet bulb for a comprehensive air quality snapshot. ## Overview The GAIN EXPRESS CO2 Meter is a handheld device featuring a high-accuracy NDIR sensor capable of measuring CO2 levels from 0 to 9999ppm with ±5-10% accuracy. It also monitors temperature (-10 to 60°C), humidity (0.1% to 99.9%), dew point, and wet bulb temperatures, making it a versatile tool for indoor air quality assessment. Powered by 4 AAA batteries or an optional 9V adapter, its ergonomic design supports portable use in offices, classrooms, and other public spaces to help identify ventilation needs and promote healthier environments. ## Description GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter : desertcart.co.uk: DIY & Tools Review: It works - I bought the device to check for co2 levels inside my home. The instructions says that it should indicate 400ppm outside, and my test indicated 408ppm which is very close (the device could be recalibrated if necessary). The meter is slow reacting so you will need to leave it for about 10 min on a location in order to get a more accurate reading. So in summary, it has helped a lot in determining the areas that need more ventilation. The cons are the design and labels of the functions is confusing, to the point that you will need the instructions in hand to operate if you don't know how to use it. Also, it is very slippery so make sure is left on a flat surface and never up. Providing you can live with that, this meter accomplish it's function and given the price, I would definitely recommend it. Review: Total disappointment - Meter arrived on time but out of the box the reading for CO2 was 978ppm opposed to the actual 519ppm measured from a calibrated professional meter. There is no way shown to calibrate to match the correct reading, the instructions say the meter was calibrated at the factory at 400ppm and the manual calibration button will only calibrate the meter if the CO2 ppm is at 400 in the room so I am not sure how it possible for end users to calibrate this machine without a chamber and co2/air mix facility. This meter is pretty much useless and a waste of time as delivered, would not recommend. ## Features - 【HIGH ACCURACY】CO2 Accuracy: 0~2000ppm(±50ppm or ±5% of the reading); 2000~9999ppm(±10% of the reading) - 【LARGE MEASURING RANGE】CO2: 0~9999ppm ; Temperature: -10~60°C(Accuracy ±0.6°C) ; Humidity: 0.1% ~ 99.9%RH(Accuracy ±3%RH) ; Dew Point: -20.0~59.9°C ; Wet Bulb: -5.0~59.9°C - 【USER-FRIENDLY】Portable Handle Design, Easily manual calibration on CO2 and humidity, Stable NDIR CO2 sensor - 【 POWER SUPPLY】Dual power source: battery (included) or 9V adaptor (**NOTED: adaptor is not included in set). Power from battery is automatically cut off when 9V adaptor is in use - 【APPLICATION】IAQ monitoring and survey, especially on CO2 level and air ventilation become widely applied in public areas such as offices, classrooms, factories, hospitals, and hotels. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0196APHHU | | Batteries | 4 AAA batteries required. | | Batteries Required? | No | | Batteries included? | No | | Battery Cell Type | Alkaline | | Best Sellers Rank | 215,320 in DIY & Tools ( See Top 100 in DIY & Tools ) 47 in CO2 Detectors | | Colour | Handheld Co2 Meter | | Customer Reviews | 3.7 3.7 out of 5 stars (98) | | Date First Available | 10 Dec. 2015 | | Item Package Quantity | 1 | | Item Weight | 200 g | | Item model number | A017755 | | Manufacturer | Gain Express Holdings Ltd. | | Part Number | A017755 | | Power Source | Battery Powered | | Product Dimensions | 7 x 5.5 x 21 cm; 200 g | | Style | Ergonomic | ## Product Details - **Alarm:** Audible - **Brand:** GAIN EXPRESS - **Colour:** Handheld Co2 Meter - **Item weight:** 200 Grams - **Manufacturer:** Gain Express Holdings Ltd. - **Operating humidity:** 99 percent - **Power source:** Battery Powered - **Sensor type:** NDIR - **Style:** Ergonomic - **UPC:** 600316560665 ## Images ![CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter - Image 1](https://m.media-amazon.com/images/I/71+eOoxRUgL.jpg) ## Questions & Answers **Q: Can this be used in the cab of my van when it does a regenerates and the co2 burn off comes into the cab** A: In the gas industry the comfort level in an indoor environment should not exceed 0.28% CO2 or 2800 ppm over an 8 hour shift. The instrument is suitable to measure this figure and may help you. My advice is to speak to the manufacturer of the instrument to determine whether it is the best tool for the job. As a disclaimer, I’m giving best advice but cannot be accused of any wrong doing as the advice is regarding the gas industry, not regeneration from petroleum or Diesel engines. **Q: How do you recalibrate this or who do you send it too** A: Hi, for calibration steps, please refer to the user manual page 8 - 9. LINK: https://cd50.net/wp-content/uploads/2022/07/7755_E.pdf **Q: Does it show the level of co2 above 2000?** A: Hi, yes, it can show the reading which above 2000. The range of CO2 is 0~9999ppm (2001~9999 out of scale). **Q: Does this comply to BS8494?** A: It works accordingly to BS 8494 but approved by BS is another matter. ## Customer Reviews ### ⭐⭐⭐⭐⭐ It works *by A***E on 10 December 2022* I bought the device to check for co2 levels inside my home. The instructions says that it should indicate 400ppm outside, and my test indicated 408ppm which is very close (the device could be recalibrated if necessary). The meter is slow reacting so you will need to leave it for about 10 min on a location in order to get a more accurate reading. So in summary, it has helped a lot in determining the areas that need more ventilation. The cons are the design and labels of the functions is confusing, to the point that you will need the instructions in hand to operate if you don't know how to use it. Also, it is very slippery so make sure is left on a flat surface and never up. Providing you can live with that, this meter accomplish it's function and given the price, I would definitely recommend it. ### ⭐ Total disappointment *by A***R on 24 January 2018* Meter arrived on time but out of the box the reading for CO2 was 978ppm opposed to the actual 519ppm measured from a calibrated professional meter. There is no way shown to calibrate to match the correct reading, the instructions say the meter was calibrated at the factory at 400ppm and the manual calibration button will only calibrate the meter if the CO2 ppm is at 400 in the room so I am not sure how it possible for end users to calibrate this machine without a chamber and co2/air mix facility. This meter is pretty much useless and a waste of time as delivered, would not recommend. ### ⭐⭐⭐⭐⭐ GREAT VALUE FOR MONEY *by M***N on 16 June 2016* Purchased for my husband to use at work - perfect tool - does all it is supposed to and at a fraction of the price of the more expensive ones. ## Frequently Bought Together - CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter - Handheld Digital Light Meter Ambient Temperature Measurer with Range up to 200,000 Lux with 4 Digit Color LCD Screen (Black) - Reductor/Bajador de pH Down para cultivo BioBizz Bio-pH- (250ml) --- ## 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.us/products/49256462-co2-meter-handheld-co2-monitor-9999ppm-measuring-range-carbon-dioxide](https://www.desertcart.us/products/49256462-co2-meter-handheld-co2-monitor-9999ppm-measuring-range-carbon-dioxide) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-10*