Grove Formaldehyde Sensor is one of the Sensor Grove toolsets that standardized connectors of SFA30 Formaldehyde Sensor and make it modularly. With a Base Shield, it simplifies the process of detecting formaldehyde significantly. The primary module is made by SENSIRION based on electrochemical sensing technology optimized for the lowest false alarm rates. The basic theory is that the gas concentration signal decomposes the electrolyte into positive and negative charged ions, and the signal is transmitted through the electrode.
Grove Formaldehyde Sensor has low cross-sensitivity to alcohol and it also has long-term stability for as long as 6 years because of advanced anti-dry technology. It is factory-calibrated and can be easily connected with the I2C or UART interface into your device. The integrated Sensirion RHT sensor compensates fully for temperature and humidity guaranteeing a dependable function in changing indoor environments. The low power consumption allows for battery operation. This makes Grove Formaldehyde Sensor a reliable, easy-to-use, and high-quality HCHO&RHT combo sensing solution.
Highlighted Features
- Low cross-sensitivity to alcohol: The accuracy of measurement is greatly improved
- Wide formaldehyde detecting range: Standard formaldehyde measurement range: 0 ~ 1000 ppb
- Long-term stability: Patented electrochemical cell with anti-dry technology and 6 years’ service lifetime
- Maintain performance under different circumstances: compensated temperatures and humidity via built-in Sensirion RHT sensor by advanced algorithms
- Grove compatible interface: The product ensures "Plug and Play" and could be versatile for various applications of Grove
Applications
- Real-time detection and reading of HCHO gas concentration in parts per billion
- Air Conditioners and Air Exchangers
- Air Purifiers
- Indoor Air Quality Monitors
Specifications
| Parameter | Value/Range |
|---|---|
| Supply voltage range | 3.3V or 5V |
| Measurement range | 0 to 1,000 ppb |
| Response time | <2 min |
| Limit of detection | <20 ppb |
| Interface | I2C / UART |
| Formaldehyde accuracy | ±20 ppb or ±20% of the measured value, whichever is larger |
Hardware Overview
Figure: Device Schematics