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Temtop C1+
Temtop C1+ CO2 Monitor, Smart Indoor Air Quality Monitor with BLE App | Portable CO2 Meter, CO2 Temperature Humidity Detector, Real-Time Data Sync for Home, Office, School, Baby Room
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Low-cost Sensirion CO2 monitor (400–5000 ppm) with a 3.3-inch LCD, Bluetooth app and an 800 mAh battery rated up to 70 days in ECO mode. Its 14–140 ℉ (-10 to 60 ℃) operating range is the widest listed, and at 0.7 in. (18 mm) thick and 4 oz (110 g) it is one of the slimmest and lightest. A good fit for unheated vans and buyers wanting a budget monitor with app data.
- Price
- $42.99
- Brand
- Temtop
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.
How it compares
Compared with the other carbon dioxide detectors on this site that list each value:
- Depth/Height 0.70 in.: the lowest of 19
- Depth/Height 18 mm: the lowest of 19
- Battery capacity 800 mAh: the lowest of 7
- Operating temp min 14 ℉: the lowest of 10
- Operating temp max 140 ℉: the highest of 10
- Operating temp min -10 ℃: the lowest of 10
Specifications
These details are subject to change and may not be current. Please check Amazon or manufacturer web site to confirm before purchase.
Detection capabilities
- Gases detected
- CO2
- Max. CO2 detection
- 5,000 ppm
- Min. CO2 detection
- 400 ppm
- Accuracy
- ±(40ppm +5%) (400-2500ppm)
- Resolution
- 1 ppm
- Temperature & humidity readout
- Yes
- Calibration method
- Manual fresh-air calibration (about 400 ppm, 200-second countdown)
- Data logging
- Yes
Alarms
- Alarm types
- Buzzer (optional) and color-coded CO2 indicator
Physical Attributes
- Weight
- 0.24 lbs
- Weight
- 0.11 kg
- Length
- 3.50 in.
- Length
- 89 mm
- Width
- 2.70 in.
- Width
- 69 mm
- Depth/Height
- 0.70 in.
- Depth/Height
- 18 mm
- Display type
- 3.3-inch segment-code LCD
Power
- DC input voltage
- 5V
Charging
- Battery capacity
- 800 mAh
Core specs
- Battery chemistry
- Lithium
Operating Temp Range
- Operating temp min
- 14 ℉
- Operating temp max
- 140 ℉
- Operating temp min
- -10 ℃
- Operating temp max
- 60 ℃
More specifications
- Warranty
- 1 Year
Features
- 【Indoor CO2 Monitor】Temtop CO2 monitor with a high-precision Sensirion CO2 sensor, measures CO2 levels, temperature, and humidity in real-time.
- 【Large and Clear Display】Equipped with a 3.3-inch large LCD screen, it can simultaneously display the test results of multiple parameters clearly, allowing users to grasp the indoor environmental conditions at a glance.
- 【Long-lasting Battery Life】With energy-saving algorithms and an 800mA large-capacity lithium battery, the C1+ can achieve a battery life of up to 70 days in ECO mode, reducing the hassle of frequent charging or battery replacement, and being more environmentally friendly.
- 【Multiple Alert Methods】The color coding, prominent CO2 number on the display, and optional buzzer of this air quality meter alert you when the CO2 concentration becomes too high.
- 【Easy to use】Basic key functions, BLE networking, easy to use, support for product OTA updates to ensure that the technology is continuously updated.
Similar products from other brands
Chosen for their similar specifications and price.
 This productTemtop C1+ |
 INKBIRDPLUS PTH-10C |
 SwitchBot Meter Pro CO2 |
 Hymeter HM-9617-5 |
|
|---|---|---|---|---|
| Price | $42.99 | $42.99 | $59.48 | $54.99 |
| Model | C1+ | PTH-10C | Meter Pro CO2 | HM-9617-5 |
| Popular brand | – | – | – | No |
| Gases detected | CO2 | CO2 | CO2 | – |
| Max. CO2 detection (ppm) | 5,000 | 5,000 | 9,999 | – |
| Min. CO2 detection (ppm) | 400 | 400 | 400 | – |
| Accuracy | ±(40ppm +5%) (400-2500ppm) | ±(50ppm + 5%) | ±(50 ppm + 5%) | – |
| Resolution (ppm) | 1 | – | – | – |
| Temperature & humidity readout | Yes | – | Yes | – |
| Sensor type | – | NDIR | NDIR | – |
| Calibration method | Manual fresh-air calibration (about 400 ppm, 200-second countdown) | Automatic calibration (can be turned off); manual calibration (200-second countdown in fresh air) | – | – |
| Data logging | Yes | – | Yes | – |
| High alarm level (ppm) | – | 1,500 | – | – |
| Adjustable alarm levels | – | Yes | – | – |
| Alarm types | Buzzer (optional) and color-coded CO2 indicator | Sound, color indicator lights | Sound, screen and app notifications | – |
| Weight (lbs) | 0.24 | 0.31 | 0.34 | 0.24 |
| Weight (kg) | 0.11 | 0.14 | 0.15 | 0.11 |
| Length (in.) | 3.50 | 2.99 | 3.62 | 3.82 |
| Length (mm) | 89 | 76 | 92 | 97 |
| Width (in.) | 2.70 | 2.76 | 3.11 | 2.20 |
| Width (mm) | 69 | 70 | 79 | 56 |
| Depth/Height (in.) | 0.70 | 1.18 | 0.98 | 1.22 |
| Depth/Height (mm) | 18 | 30 | 25 | 31 |
| Display type | 3.3-inch segment-code LCD | Full-color LCD | – | – |
| Power sources | – | – | 2 AA alkaline batteries or 5V 1A USB-C | – |
| DC input voltage | 5V | 5V-24V | 5V | – |
| Charging port | – | USB-C | USB-C | – |
| Battery runtime (hours) | – | 72 | – | – |
| Battery capacity (mAh) | 800 | 1,000 | – | – |
| Battery chemistry | Lithium | Lithium-ion polymer | Alkaline (2 AA) | – |
| Operating temp min (℉) | 14 | – | – | – |
| Operating temp max (℉) | 140 | – | – | – |
| Operating temp min (℃) | -10 | – | – | – |
| Operating temp max (℃) | 60 | – | – | – |
| Warranty | 1 Year | 1 Year | 1 Year | – |
Data sources
Data for this product compiled from these sources:
Specifications last updated Oct 20, 2026.