Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Detection Gases | VOC, CO2, Formaldehyde (HCHO) |
| Communication Interface | UART / TTL |
| Operating Voltage | 5V DC |
| CO2 Measurement Range | 400 - 5000 ppm |
| TVOC Measurement Range | 0 - 9.99 mg/m³ |
| Formaldehyde Range | 0 - 1.00 mg/m³ |
| Response Time | < 60 seconds |
| Operating Temperature | -10°C to 50°C |
| Dimensions | 32mm x 20mm x 8mm |
| Warm-up Time | Approx. 3 minutes |
Anonymous
Mar 31, 2026
Rating: 3/5
Works well but sensitive to humidity
Generally good sensor, but I noticed the readings fluctuate a bit in very humid conditions. Once I accounted for that in my code, it works great for monitoring office ventilation.
Anonymous
Mar 26, 2026
Rating: 5/5
Compact and reliable
Small footprint makes it easy to fit into custom enclosures. I've been running it for two weeks straight without any drift or issues. Highly recommend for DIY air quality monitors.
Anonymous
Mar 21, 2026
Rating: 4/5
Solid performance for the price
Does exactly what it says on the tin. The VOC readings jump up when I use cleaning sprays, which gives me confidence in its sensitivity. Documentation could be slightly better, but manageable.
Anonymous
Mar 21, 2026
Rating: 4/5
Good sensitivity, needs calibration time
The sensor picks up changes in air quality quickly once warmed up. Just remember to let it run for a few minutes before trusting the initial data. The formaldehyde detection is a nice bonus feature.
Anonymous
Mar 15, 2026
Rating: 5/5
Perfect for my smart home project
This module integrated seamlessly with my ESP32 setup. The UART communication is stable, and the CO2 readings seem accurate when compared to my reference meter. Great value for a 3-in-1 sensor.
Anonymous
Mar 11, 2026
Rating: 5/5
Excellent data output
The data stream is clean and easy to parse. I appreciate that it handles all three gas types in one package, saving me GPIO pins on my microcontroller. Will buy again.
Q: Is the output data digital or analog?
A: This module outputs digital data via UART (TTL level). It does not provide analog voltage outputs for the gas concentrations.
Q: How often does the sensor need to be calibrated?
A: The sensor features an automatic baseline calibration function. For best results, ensure the device operates in fresh air (outdoor or well-ventilated area) for at least 24 hours once every few months.
Q: Can this sensor detect carbon monoxide (CO)?
A: No, this specific module is designed to detect VOCs, Carbon Dioxide (CO2), and Formaldehyde (HCHO). It does not detect Carbon Monoxide (CO).
Q: What is the pinout configuration for the UART interface?
A: The module uses a standard 4-pin header: VCC (5V), GND, TX (connect to RX of MCU), and RX (connect to TX of MCU). Please refer to the datasheet diagram for pin positioning.
Q: Does this require an external library for Arduino?
A: While you can write your own parser, we provide a sample Arduino library on our GitHub repository that simplifies reading the data from all three sensors simultaneously.
Dual-Tip Colored Oil-Based Marker Set for Drawing, Design, and Hand Sketching
$9.15
Podragon Waterproof Waist Bag for Diving, Snorkeling, Swimming, and Surfing - Large Capacity Airtight Zipper Phone Pouch for Rafting and Trekking
$399.00
Stainless Steel Countertop Food Warmer Display Case for Fried Chicken, Egg Tarts, Burgers, and Pies
$595.00
Custom Company Sign KT Board Bank Account Opening Plaque Stainless Steel Door Plate PVC Simple Signboard Acrylic Advertising Board
$17.00
New Travel Portable Water Bottle Sleeve, Crossbody Bag for Coins, Keys, and Phone, Single Bottle Pouch for Cycling and Fitness
$20.00
Useless Genius Autumn Forest Animal Plant Bird Butterfly Handmade Pottery Ceramic Stamp Clay Mold
$8.80
Underbite Corrector Storage Case for Children - Portable Box with Lanyard for Frankel Appliance and TB Expander
$14.33
Wilderness Old Blacksmith EDC Storage Box - Small Shockproof, Waterproof, and Moisture-Proof Case with Foam Insert
$29.90
Manufacturer Sales Fully Automatic Pasteurization Production Line Vegetable Blanching Equipment Bottled Milk Sterilization Line
$12,740.00
Pomegranate Juice Grape Juice Pasteurization Tank Orange Juice Apple Juice Sterilizer Complete Mare's Milk Pasteurized Milk Production Line
$6,048.00
Ouyang Style Medium Regular Script: 52 Ancient Poems on Xuan Paper Large Character Copybook for Beginners - Ink-Blot Resistant
$12.00
Honeywell 7950 Phase Change Pad Thailand Import Laptop CPU GPU Thermal Interface Material Heat Sink Paste
$14.80
Calligraphy Arm Rest Felt Pad - Mini Brocade Felt Hand Rest for Chinese Painting and Calligraphy Practice, Inkstone Mat by Meilin Brush Studio
$7.48
Trail Running Silicone Hydration Bladder - Foldable 500ML Pocket Water Bag for Hiking and Outdoor Sports
$22.00
Steel Wheel Lug Nuts for Car Modification, Compatible with Civic, Mazda6, Reiz, Sylphy, Extended External Hex Nut Caps
$75.55
Mobile Gantry Crane – Manual Push-Run Small Home Hoist (1/2/3/5 Ton)
$1,244.00
Taiwan Ginger Shredder - Multi-Function Stainless Steel Slicer for Potatoes, Carrots, and Ginger
$5,200.00
Iers Electric Airbrush/Marker Pen Wireless Handheld Portable for Gundam Model Painting
$322.00
Commercial Glass Food Warmer Display Case for Egg Tarts, Hamburgers, Fried Chicken, and Youtiao - Countertop Heating Cabinet for Catering
$1,795.00
Premium Used Tires Removed from Vehicles Sizes 155 165 175 185 195 205 215 225
$54.00
Storage Bag Compatible with Dyson/Laifen Hair Dryer Curling Iron Straightener Double-Layer Portable Travel Hand-Carry Case
$48.40
Chushinmi - Silicone Collapsible Dish Drying Rack, Kitchen Organizer, Sink Utensil Holder for Bowls and Chopsticks
$61.90
Wenxin Tang Ultra-Clear Zhi Yong Thousand Character Classic Regular Script Calligraphy Cards - Boxed Practice Sheets for Medium-Sized Brush Writing
$40.80
Cute Pig Pot Lid Holder and Drainage Mat, Multi-Function Heat Insulator and Cutting Board Rest
$2.01
![[Damai Micro-Needle Hair Transplant Patent] Top Scalp Thinning Treatment | High-Density 200 Grafts Micro-Needle Transplant](https://www.gosteppe.com/cache/small/product/269847/legacy-main-921c5365abd34b2597668ec5.webp)
[Damai Micro-Needle Hair Transplant Patent] Top Scalp Thinning Treatment | High-Density 200 Grafts Micro-Needle Transplant
$199.00
Song Dynasty Guo Xi's 'Traveling in Snowy Mountains' Hanging Scroll - Study Copy Template, Art Core, Landscape Painting, Zen Decorative Art, HD Collectible
$12.80
Drain Basket for Wet/Dry Separation with Hanging Vegetable Strainer Rack
$111,978.00
Custom Mesh Lid Organizer Bag for Pelican 1535 Case - Laptop Compartment
$118.70
Home LED High-Power Rechargeable Flashlight, Multi-Purpose Long-Range Portable Ultra-Bright Mini Torch
$20.60
Accsoon CineEye M7 Pro 4K Wireless Video Transmitter and Monitor with 7-inch HDMI/SDI Dual-Transmission Screen
$99.00
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
