CO₂ and Air Quality Sensors for Homes, Offices and Buildings
Sensors that show when indoor air needs fresh ventilation. They measure CO₂, temperature and humidity, and the KP-300 adds PM2.5, so people can open a window or turn up the ventilation before stale air causes headaches and drowsiness. The range goes from a pocket-size sensor for your phone to a Wi-Fi sensor that reports to the cloud.
- Infineon XENSIV PAS CO₂ sensing for precise, stable readings
- CO₂ accuracy ±50 ppm, temperature ±0.2 °C, humidity ±2 %
- Three models: portable (Bluetooth), home display (e-paper) and cloud-connected (Wi-Fi MQTT)
- Phone app or cloud dashboard with history and alerts
Choose by where you use it and how you check the air
To check the air on the go, at a desk or in a car, choose the KP-100BT: it plugs into a phone and shows readings in the app. For a home or office that needs a reading you can see at a glance, choose the KP-300 with its e-paper display. For buildings, farms and factories that need data in the cloud and control of fans or warning lights, choose the KP-200W.
- CO₂, Temperature & Humidity
- Phone App With Alerts
- E-Paper Display
- Cloud Upload Every 10 Seconds
What you get with ASUKA CO₂ sensors
Know when the air is getting stale, and do something about it.
KP-100BTWith the Phone App- 01
Accurate CO₂ Readings in Seconds
Infineon's XENSIV PAS CO₂ sensing technology combined with ASUKA's hardware and software gives readings within seconds. The KP-100BT is certified by the national gas calibration laboratory of ITRI (Industrial Technology Research Institute).
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Alerts Before the Air Becomes a Problem
Taiwan and EU guidelines keep indoor CO₂ below 1,000 ppm (8-hour average). The app warns you when levels rise, so you can ventilate in time.
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Small Enough to Carry
The KP-100BT measures 4.5 × 4.5 cm, weighs 10 g and plugs into a phone through USB-C, so it works at home, in the office or in a car.
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Readable at a Glance
The KP-300 shows PM2.5, CO₂, temperature and humidity on an e-paper display that stays readable in sunlight. The display layout can be customised, and it charges over USB-C with a low-power design for long battery life.
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Data and Control in the Cloud
The KP-200W uploads readings every 10 seconds over Wi-Fi and MQTT, shows CO₂, temperature and humidity history on a dashboard, and its built-in relay can switch fans or warning lights.
Where our CO₂ sensors are used
Specifications
| Model | KP-100BT: portable, connects to a phone KP-300: home and office monitor with e-paper display KP-200W: Wi-Fi cloud-connected sensor with relay |
|---|---|
| Measures | KP-100BT: CO₂, temperature, humidity KP-300: PM2.5, CO₂, temperature, humidity KP-200W: CO₂, temperature, humidity |
| CO₂ | Sensor: Infineon XENSIV PAS CO₂ (photoacoustic) KP-100BT: 0–10,000 ppm, ±50 ppm, response 10 s KP-300: ±50 ppm ±5 % (400–3,000 ppm) |
| Temperature | KP-100BT: 0–50 °C, ±0.2 °C KP-300: ±0.2 °C typical |
| Humidity | KP-100BT: 0–100 % RH, ±2 % KP-300: ±2 % |
| PM2.5 | KP-300: ±15 µg/m³ (0–100 µg/m³) |
| Measurement interval | KP-100BT: every 10 s KP-200W: uploads to the cloud every 10 s |
| Connectivity | KP-100BT: Bluetooth 5.1 LE; iOS / Android app KP-200W: Wi-Fi, MQTT; cloud dashboard |
| Output | KP-200W: built-in relay for fans or warning lights |
| Power | KP-100BT: USB-C, 5 V, 35 mA average / 120 mA peak KP-300: rechargeable battery, USB-C charging |
| Dimensions and weight | KP-100BT: 4.5 × 4.5 cm, 10 g KP-300: 111.5 × 66 × 25 mm |
| Operating environment | KP-300: 0–50 °C, 0–100 % RH |
| Certifications | KP-100BT: FCC, CE, MIC, KC, BSMI |
Interested in our CO₂ sensors?
Tell us where the sensors will be used and how many you need, and our team will get back to you.