1.The product description FS00509 type formaldehyde module is our company is aimed at the market for the existing formaldehyde detection module anti-interference ability is not strong、bad of environmental adaptability、the phenomenon of not being able to use in high temperature environment launched a brand new product。In keep excellent anti-jamming capability at the same time the automobile grade fuel cell solid electrolyte was applied to formaldehyde detection，real solid not dry, zero leakage。
This module is not affected by the low concentration of alcohol in the environment，it can realize the selective detection of formaldehyde gas in normal living environment，especially suitable for air conditioning, automobile and other high storagetemperature of the scene。
2. Sensor characteristics. high sensitivity, high stability, high resolution
. resistance to high temperature, temperature compensation function
. excellent anti-jamming capability, with temperature compensation
. excellent linear output
. low power consumption, long service life
. Provide UART,PWM，DAC analog voltage
3.Main applications. Air quality monitoring equipment, portable instrument, air purifier
. Air conditioning, the air inside the car formaldehyde detection
. Fresh air ventilation systems, air conditioning, intelligent household equipment
. Hospitals, hotels, schools and other public places
4.Technical indicators | Formaldehyde module (FS00509) technical indicators |
| Detection gas | Formaldehyde |
| Detection principle | A fuel cell |
| Output mode | UART output (3.3V level) |
| DAC(0.4 ~ 2V for 0-full scale) |
| PWM (reserved customizable) |
| Operating voltage | 3.7V～5V |
| Working current | ＜10mA |
| Preheating time | ≤3min |
| Response time | ≤60s |
| Recovery time | ≤60s |
| Measuring range | 0～1.5ppm |
| detection precision | ±30ppb or ±10% at maximum (25±3℃) (50±5%RH) |
| Resolution | ≤0.01ppm |
| Operating temperature | 0 ~ 50℃ |
| Storage temperature | -40℃～70℃ |
| Operating humidity | 10%RH-90％RH(No condensation) |
| Storage temperature | -20℃～50℃ |
| Service life | of 6 years (in the air) |
Table 1 Technical indicators
5. Anti-interference characteristics| gas | Disturbance gas concentration (PPM) | Formaldehyde concentration (PPM) |
| alcohol | 2 | ＜0.08 |
| benzene | 10 | 0 |
| Acetic acid | 10 | 0 |
| ammonia gas | 10 | 0 |
| Carbon monoxide | 1000 | 6 |
| hydrogen gas | 1000 | 6 |
Table 2 Anti-jamming performance
* Special attention：Within the designated area，a step change in %RH produces a short-term transient response
6.sizing instructions Figure 1: outline dimensions (unit: mm, error ±0.2mm)
7.Formaldehyde sensor product selection diagram 
