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Gain Express A017755
Portable CO2 Meter Handheld CO2 Detector Monitor 0~9999ppm, Carbon Dioxide Meter with Alarm Function, Temperature & Humidity Meter NDIR Sensor Air Quality Monitor for Home Trip Classroom and Office
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A handheld NDIR meter with a handle, measuring CO2 from 0 to 9999 ppm along with temperature, humidity, dew point and wet bulb. Accuracy is ±50 ppm or ±5% up to 2000 ppm and ±10% above that, with manual calibration for CO2 and humidity. It runs on batteries or an optional 9V adapter, suiting occasional ventilation checks more than continuous monitoring. Its listed depth of 8.3 in. (210 mm) likely refers to its length.
- Price
- $134.90
- Brand
- Gain Express
Prices from Amazon as of . Product prices and availability are accurate as of the date and time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of the product. As an Amazon Associate I earn from qualifying purchases.
Ranking within Category
Comparing this product to others on Nomad Gear Finder (in the carbon dioxide detectors category with a value specified):
- This product's Length is lower than 77% of 18 others: 2.76 in. (70 mm)
- This product's Width is lower than 94% of 18 others: 2.17 in. (55 mm)
- This product's Depth/Height is the highest of 19: 8.27 in. (210 mm)
Specifications
These details are subject to change and may not be current. Please check Amazon or manufacturer web site to confirm before purchase.
- Model
- A017755
Detection capabilities
- Gases detected
- CO2
- Max. CO2 detection
- 9,999 ppm
- Min. CO2 detection
- 0 ppm
- Accuracy
- ±50 ppm or ±5% of reading
- Temperature & humidity readout
- Yes
- Sensor type
- NDIR
- Calibration method
- Manual calibration
Physical Attributes
- Weight
- 0.44 lbs
- Weight
- 0.20 kg
- Length
- 2.76 in.
- Length
- 70 mm
- Width
- 2.17 in.
- Width
- 55 mm
- Depth/Height
- 8.27 in.
- Depth/Height
- 210 mm
Power
- Power sources
- Battery or 9V adapter (adapter not included)
- DC input voltage
- 9V
Features
Details from the Gain Express A017755 Amazon listing:
- 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
Similar products from other brands
Chosen for their similar specs and price:
 This productGain Express A017755 |
 Inkbird IAM-T1 |
 SAF Aranet4 HOME (TDSPC0H3) |
 briidea BR-169 |
|
|---|---|---|---|---|
| Price | $134.90 | $129.99 | $189.00 | $74.99 |
| Model | A017755 | IAM-T1 | Aranet4 HOME (TDSPC0H3) | BR-169 |
| Gases detected | CO2 | CO2 | CO2 | – |
| Max. CO2 detection (ppm) | 9,999 | 9,999 | 9,999 | – |
| Min. CO2 detection (ppm) | 0 | 0 | 0 | – |
| Accuracy | ±50 ppm or ±5% of reading | ±(30 ppm + 3% of reading) | ±(30 ppm + 3% of reading) | – |
| Resolution (ppm) | – | 1 | 1 | – |
| Sampling interval (s) | – | 60 | 300 | – |
| Temperature & humidity readout | Yes | Yes | Yes | – |
| Sensor type | NDIR | NDIR (Senseair) | NDIR | – |
| Calibration method | Manual calibration | Built-in auto-calibration; manual calibration via app | Factory calibrated, automatic (ABC) and manual fresh-air calibration | – |
| Data logging | – | Yes | Yes | – |
| High alarm level (ppm) | – | 1,400 | 1,400 | – |
| Adjustable alarm levels | – | Yes | Yes | – |
| Alarm types | – | Buzzer sound and on-screen alarm | Color-coded screen and optional buzzer | – |
| Weight (lbs) | 0.44 | 0.30 | 0.23 | 0.31 |
| Weight (kg) | 0.20 | 0.14 | 0.10 | 0.14 |
| Length (in.) | 2.76 | 2.95 | 2.80 | 0.87 |
| Length (mm) | 70 | 75 | 71 | 22 |
| Width (in.) | 2.17 | 3.15 | 2.80 | 2.56 |
| Width (mm) | 55 | 80 | 71 | 65 |
| Depth/Height (in.) | 8.27 | 1.30 | 0.94 | 4.06 |
| Depth/Height (mm) | 210 | 33 | 24 | 103 |
| Display type | – | 2.13-inch electronic ink (e-ink) display | E-ink | – |
| IP rating | – | – | IP20 | – |
| Power sources | Battery or 9V adapter (adapter not included) | 2 x AA batteries | 2 AA batteries | – |
| DC input voltage | 9V | 3V | – | – |
| Battery chemistry | – | Alkaline (2 x AA) | Alkaline (AA, included); lithium AA also supported | – |
| Operating temp min (℉) | – | 32 | 32 | – |
| Operating temp max (℉) | – | 122 | 122 | – |
| Operating temp min (℃) | – | 0 | 0 | – |
| Operating temp max (℃) | – | 50 | 50 | – |
| Max operating humidity (% RH) | – | – | 85 | – |
| Certifications summary | – | FCC Part 15 Class B statement | CE, FCC, ISED | – |
| FCC Part 15 compliant | – | Yes | Yes | – |
| CE marked | – | – | Yes | – |
| Warranty | – | 1 Year | 2 Years | 2 Years |
Specifications last updated Oct 20, 2026.