1. Información de seguridade
Please read all instructions carefully before using the INKBIRDPLUS PTH-9C Indoor Air Quality Monitor. Retain this manual for future reference.
- Non expoñas o dispositivo a temperaturas extremas, luz solar directa nin humidade elevada.
- Evite deixar caer ou someter o dispositivo a fortes impactos.
- Manteña o dispositivo lonxe da auga e doutros líquidos.
- Non intente desmontar nin reparar o dispositivo vostede mesmo. Póñase en contacto con persoal cualificado para o servizo técnico.
- Use só o cable USB proporcionado para cargar.
- Ensure proper ventilation when calibrating the device.
2. Produto rematadoview
The INKBIRDPLUS PTH-9C is a versatile 3-in-1 indoor air quality monitor designed to accurately detect Carbon Dioxide (CO2) levels, temperature, and humidity. It features a clear LCD screen with a multi-color display for easy interpretation of air quality data and includes customizable alarm functions.
Características principais:
- Multifunción 3 en 1: Monitors Carbon Dioxide (CO2), Temperature, and Humidity.
- Sensores de alta precisión: Equipped with a high-precision infrared sensor for CO2 and a built-in high-performance chip for accurate readings.
- 3-Color Smart Alarm: Visual indication of CO2 concentration stages (Normal, Warning, Dangerous) with customizable alarm thresholds.
- USB recargable: Features a 2400 mAh lithium battery, recommended for continuous use while charging.
- Pantalla LCD grande: Provides clear and easy-to-read data display with selectable temperature units (℃/℉).
- Colocación versátil: Includes a hanging hole for wall mounting and can be placed on flat surfaces.
Compoñentes do produto:

Figura 1: Fronte view of the INKBIRDPLUS PTH-9C monitor displaying CO2, temperature, and humidity readings.

Figura 2: Atrás view of the monitor showing the power button, UP/DOWN buttons, hanging hole, and battery compartment.
3. Configuración
3.1 Carga inicial e acendido
- Connect the provided USB cable to the device's USB port and plug the other end into a 5V-1A USB power adapter (not included) or a computer USB port.
- The device will automatically power on and begin displaying readings. It is recommended to keep the device plugged in for continuous operation due to the 2400 mAh lithium battery powering three sensors.
- Allow the device to stabilize for approximately 30 seconds to obtain initial accurate readings.

Figure 3: The monitor connected via USB for charging and continuous power.
3.2 Calibración de CO2
For optimal accuracy, especially upon first use, calibrate the CO2 sensor in an open, well-ventilated environment (e.g., outdoors).
- Asegúrese de que o dispositivo estea apagado.
- Take the device to an outdoor area with fresh air.
- Simultaneously press and hold the three buttons on the device for 200 seconds. The display will indicate calibration in progress.
- Once calibration is complete, the device will return to normal operation.

Figure 4: Illustration of pressing three buttons for CO2 calibration.
4. Instrucións de funcionamento
4.1 Mostrar información
The large LCD screen displays real-time readings for CO2 concentration, temperature, and humidity. A multi-color bar visually indicates the CO2 level status.
- CO2 (ppm): Carbon Dioxide concentration in parts per million.
- Temperatura (℃/℉): Temperatura ambiente.
- Humidade (%): Humidade relativa.
- Gráfico histórico: Displays historical CO2 data over time.

Figura 5: detallada view of the monitor's display showing all measured parameters.
4.2 CO2 Concentration Stages and Alarm
The device categorizes CO2 levels into three stages, indicated by color changes on the display and an audible alarm when thresholds are exceeded:
- Normal Stage: 400-700 ppm (Green indication)
- Warning Stage: 700-1500 ppm (Yellow indication)
- Dangerous Stage: 1500-5000 ppm (Red indication)

Figure 6: Visual representation of CO2 concentration levels and their corresponding safety stages.
4.3 Customizing Alarm Thresholds
You can customize the CO2 concentration value at which the alarm will trigger.
- Double-press the designated button (refer to Figure 2 for button layout) to enter the alarm setting mode.
- Use the UP/DOWN buttons to adjust the desired CO2 alarm value.
- Press the button again to confirm and save the setting.

Figure 7: The monitor indicating a CO2 warning alarm.
4.4 Cambio de unidades de temperatura
To switch between Celsius (℃) and Fahrenheit (℉) for temperature display, press the appropriate button (usually labeled with ℃/℉ or similar, refer to Figure 2).
Control de retroiluminación 4.5
The device's display backlight can be turned on or off. Refer to the button functions (Figure 2) for the specific button controlling the backlight.
5. Mantemento
- Limpa o dispositivo regularmente cun pano suave e seco. Non empregues produtos de limpeza abrasivos nin disolventes.
- Ensure the ventilation holes are free from dust and debris to maintain accurate readings.
- Cando non o use durante períodos prolongados, garde o dispositivo nun lugar fresco e seco.
6 Solución de problemas
| Problema | Causa posible | Solución |
|---|---|---|
| Inaccurate CO2 readings | Device not calibrated or placed in a poorly ventilated area. | Perform CO2 calibration in a fresh air environment. Ensure proper air circulation around the device. |
| Batería de curta duración | Continuous use of sensors drains battery quickly. | Keep the device plugged in via USB for continuous operation. The battery is primarily for backup. |
| A alarma non soa | Alarm function is disabled or threshold is set too high. | Check alarm settings and ensure it is enabled. Adjust the alarm threshold to a suitable level. |
| Pantalla non visible | Backlight is off or device is powered off. | Press the backlight button to turn it on. Ensure the device is powered on and charged. |
7. Especificacións
| Característica | Detalle |
|---|---|
| Número de modelo | PTH-9C |
| Funcións | CO2 Detection, Temperature, Humidity |
| CO2 Sensor Type | High-precision infrared sensor |
| CO2 Concentration Stages | Normal (400-700 ppm), Warning (700-1500 ppm), Dangerous (1500-5000 ppm) |
| Batería | Batería de litio de 2400 mAh |
| Fonte de enerxía | Alimentado por batería (recargable por USB) |
| Mostrar | Pantalla LCD grande |
| Unidades de temperatura | ℃ / ℉ selectable |
| Peso do elemento | 306 gramos |
| Dimensións do paquete | 14 x 10 x 5 cm |
| Fabricante | INKBIRDPLUS |
8. Garantía e soporte
For warranty information, technical support, or any inquiries regarding your INKBIRDPLUS PTH-9C monitor, please refer to the contact information provided with your product packaging or visit the official INKBIRDPLUS websitio.





