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FABISENSE 9CW Indoor CO₂ Detector, NDIR Carbon Dioxide Monitor with Temperature Humidity, Alarm & Wi-Fi Tuya Smart

Name: FABISENSE 9CW Indoor CO₂ Detector, NDIR Carbon Dioxide Monitor with Temperature Humidity, Alarm & Wi-Fi Tuya Smart
Rating: 4.90 (50 reviews)

$39.99 USD

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功能 PTH-9C- CO₂ Monitor PTH-9CW-Smart WiFi CO₂ Monitor

FABISENSE PTH-9C / PTH-9CW CO₂ Monitor

Know Your Indoor CO₂ Level at a Glance

The FABISENSE PTH-9C / PTH-9CW CO₂ Monitor is designed for simple, continuous indoor carbon dioxide monitoring.

Equipped with an NDIR CO₂ sensor, it tracks CO₂ levels from 400–5000 ppm while also displaying temperature and humidity on one clear screen.

A large numerical display and visual air-quality status indicator make changing indoor conditions easy to understand.

Choose the PTH-9C for straightforward standalone monitoring, or the PTH-9CW for added 2.4GHz Wi-Fi connectivity and Tuya Smart app support.

Real-Time NDIR CO₂ Monitoring

CO₂ levels can rise quickly in enclosed or occupied spaces.

The built-in NDIR sensor continuously measures carbon dioxide concentration to help you understand changing indoor air conditions.

CO₂ Range: 400–5000 ppm
Resolution: 1 ppm
Accuracy: ±(50 ppm ±5%)

Real-time monitoring makes it easier to recognize when fresh-air ventilation may be needed.

Large, Easy-to-Read Display

Important information is displayed clearly on one screen.

View:

CO₂ • Temperature • Humidity • Air Quality Status • Battery Level

The large CO₂ number can be checked quickly from across a room without navigating through complicated menus.

Visual Air Quality Indicator

Numbers alone are not always easy to interpret.

The PTH-9C series uses a visual status indicator to help you quickly recognize changing indoor CO₂ conditions.

A quick glance gives you a clearer idea of the current room environment and when ventilation may be useful.

Temperature & Humidity Monitoring

In addition to CO₂, the monitor also measures indoor temperature and relative humidity.

Temperature Range: -10°C to 40°C
Temperature Accuracy: ±1°C

Humidity Range: 20%–80% RH
Humidity Accuracy: ±5% RH

This gives you a more complete view of indoor comfort conditions from one device.

Built-In Audible Alert

The built-in buzzer provides an additional reminder when the monitored level reaches the preset warning condition.

Together with the large numerical display and visual indicator, the audible alert makes important changes easier to notice.

PTH-9C vs PTH-9CW

Feature	PTH-9C	PTH-9CW
NDIR CO₂ Sensor	✓	✓
CO₂ Monitoring	✓	✓
Temperature	✓	✓
Humidity	✓	✓
Visual Status Indicator	✓	✓
Buzzer Alert	✓	✓
Low Battery Alert	✓	✓
2.4GHz Wi-Fi	—	✓
Tuya Smart App	—	✓

PTH-9C

Simple Standalone Monitoring

A practical choice for users who mainly want to check CO₂, temperature and humidity directly on the device.

PTH-9CW

Wi-Fi Smart Monitoring

Includes all PTH-9C monitoring functions plus:

2.4GHz Wi-Fi
Tuya Smart App

Ideal for users who prefer connected monitoring through their smartphone.

Smart Monitoring with PTH-9CW

The PTH-9CW connects to a 2.4GHz Wi-Fi network and works with Tuya Smart for compatible app functions.

This gives you a more convenient way to view indoor environmental information from your phone.

Wi-Fi and app functions are available on PTH-9CW only.

Rechargeable & Easy to Place

A built-in 2000mAh rechargeable Li-Po battery gives you more flexibility when positioning the monitor.

Charging: USB Type-C
Input: 5V ⎓ 1A

Place it on a:

Desk • Nightstand • Shelf • Workstation • Greenhouse Bench

The compact design makes it easy to move between different indoor spaces.

Designed for Everyday Indoor Spaces

Bedroom

Keep an eye on CO₂ conditions in enclosed sleeping spaces.

Home Office

Monitor changing CO₂ levels during long working sessions.

Classroom

Useful for occupied learning and study environments.

Living Room

Check everyday indoor CO₂, temperature and humidity conditions.

Greenhouse

Monitor CO₂ together with temperature and humidity in one device.

RV & Enclosed Spaces

Compact monitoring for smaller enclosed environments.

Product Specifications

Specification	PTH-9C / PTH-9CW
CO₂ Sensor	NDIR
CO₂ Range	400–5000 ppm
CO₂ Resolution	1 ppm
CO₂ Accuracy	±(50 ppm ±5%)
Temperature Range	-10°C–40°C
Temperature Accuracy	±1°C
Humidity Range	20%–80% RH
Humidity Accuracy	±5% RH
Alarm	Audible Buzzer
Low Battery Alert	Yes
Battery	2000mAh Li-Po
Charging Port	USB Type-C
Charging Input	5V ⎓ 1A
Wi-Fi	PTH-9CW Only
Wi-Fi Frequency	2.4GHz
APP	Tuya Smart
Product Size	98 × 90 × 40 mm

Simple Monitoring. Clearer Indoor Awareness.

Whether you choose the standalone PTH-9C or the smart PTH-9CW, both models are designed to make indoor CO₂ monitoring simple and easy to understand.

See the number. Understand the change. Know when to ventilate.

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Your cart
Variant	Variant total	Quantity	Price	Variant total
PTH-9C- CO₂ Monitor	PTH-9C- CO₂ Monitor $39.99/ea	$0.00	Quantity	$39.99/ea	$0.00

PTH-9CW-Smart WiFi CO₂ Monitor	PTH-9CW-Smart WiFi CO₂ Monitor $49.99/ea	$0.00	Quantity	$49.99/ea	$0.00

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5 stars: 45 (90%)
4 stars: 5 (10%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Solid feature set

The combination of NDIR CO2 monitoring and WiFi is useful. It has been a practical addition to our home office.

Good monitor for home use

I like the real-time readings and rechargeable design. Initial app pairing required me to follow the instructions carefully.

Does what I need

CO2, temperature, and humidity readings are clear and the app is convenient. The buttons could be a little more intuitive.

Useful device with a bright display

The readings are easy to see and the WiFi feature is helpful. I would like a few more display customization options.

Good overall, app setup took a little time

The monitor itself is easy to use and the display is clear. Connecting the WiFi took me a little longer than expected, but it worked after setup.

Useful everyday tool

After using it for a while, checking indoor CO2 has become part of my normal routine, especially in closed rooms.

Easy to glance at

The display layout is clean. I can quickly see the CO2 level from a short distance.

Nice for a greenhouse shelf

It sits neatly on the shelf and lets me monitor CO2 along with temperature and humidity in one place.

Good choice for WiFi monitoring

I specifically wanted a CO2 monitor with WiFi, and this one gives me both a local display and app access.

Battery backup is useful

I like that I can unplug it and move it temporarily without immediately losing the display.

Straightforward indoor monitor

It focuses on the readings I care about and presents them clearly without making the device complicated.

Helpful for a busy room

We use it in a room where people come and go throughout the day. The CO2 changes are easy to follow.

Good size and design

The monitor feels compact without making the screen too small. It fits well on a shelf or workstation.

Makes ventilation decisions easier

Instead of guessing when a room feels stuffy, I can check the CO2 reading and decide when to air it out.

Good monitor for the bedroom

Compact enough for a nightstand and easy to read in the morning. I like checking the overnight CO2 level.

Nice combination of features

The CO2 sensor, temperature, humidity, alarm, rechargeable battery, and WiFi cover everything I was looking for.

App adds extra convenience

The screen is already useful, but the Tuya Smart app makes it easier to check the monitor from another room.

Great for working from home

I spend many hours in one room, so being able to watch the CO2 level during the day is helpful.

Easy air quality check

A quick look at the screen tells me whether the room conditions have changed. Very simple to use.

Convenient USB-C charging

USB-C charging is convenient since I already use the same type of cable for several other devices.

Useful temperature and humidity data

I bought it for CO2, but the temperature and humidity readings turned out to be useful as well.

Clear CO2 numbers

The large CO2 number is the first thing you see, which is exactly what I wanted from this monitor.

Good for closed rooms

I use this in a room that stays closed much of the day. It is useful for seeing how quickly CO2 can build up.

Works well on a desk

The size is just right for a desk or shelf. It is easy to glance at while working.

Helpful audible alert

I like having an audible warning in addition to the visual display. It makes the monitor easier to notice.

Simple controls

The device is easy to operate and the important information is shown clearly on the screen.

Good indoor air monitor

The display gives a quick picture of the room conditions without needing to open the app every time.

Nice for remote checking

I wanted the WiFi version mainly so I could view readings through the app. That feature has been useful.

Useful real-time readings

The real-time CO2 display is helpful, especially when several people are in the room for a long time.

Easy to move around

I have used it in the bedroom, office, and living room. The size and rechargeable battery make that easy.

Very practical device

CO2, temperature, humidity, WiFi, and an audible alarm in one compact monitor is a practical combination.

Good for shared rooms

We use it in a family room where several people spend time. It makes indoor air conditions much easier to notice.

Accurate looking and responsive

The readings change when the room gets crowded or when I open the window, which is exactly what I wanted to monitor.

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FABISENSE 9CW Indoor CO₂ Detector, NDIR Carbon Dioxide Monitor with Temperature Humidity, Alarm & Wi-Fi Tuya Smart