DESCRIPTION
Note:
This product is a DIY kit and needs to be soldered and assembled by yourself.
The electrochemical formaldehyde module is a general-purpose, miniaturized module. Using the electrochemical principle to detect CH20 in the air, it has good selectivity and stability. Built-in temperature sensor for temperature compensation; at the same time, it has digital output and analog voltage output, which is convenient to use. Electrochemical formaldehyde module is a general-purpose gas module designed and manufactured by closely combining mature electrochemical detection technology with sophisticated circuit design.
Pay attention to the measurement, please close the doors and windows as much as possible, and do not approach people to breathe or bring wind. Large turbulence will fluctuate from time to time, and the result is most accurate after standing for half an hour. After the measurement is completed, please put the instrument into the box and place it in a place with a relatively low formaldehyde concentration. Because it is an electrochemical sensor, a place with a high formaldehyde concentration will easily overload the sensor for a long time, resulting in a long time of zero in the next measurement.
Kit parameters:
Product name: OLED formaldehyde temperature and humidity detector kit;
Working voltage: DC 5V;
Appearance size: 70mm*45mm*25mm;
Product weight: 26g;
Formaldehyde detection range: 0-5. 000 mg/m3;
Interfering gases: alcohol, carbon monoxide;
(The sensor is very sensitive, please do not use it in strong convection air environment, or high temperature and high humidity environment, it is easily interfered by other aldehyde gases, such as alcohol, perfume, mildew, etc.).
Function:
1. The detection shows the current formaldehyde concentration, temperature and humidity.
2. Alarm reminders beyond the set range.
3. Power off to save the setting information.
Temperature detection range: 0 degrees-50 degreesError: +-2 degrees.
Humidity detection range: 20%-95% Error: +-5%.
Package includes:
1 x DIY Kit.
Comment - Quantity:
SMD IAP15W413As MCU - 1;
SMD active buzzer 9650 DC5V - 1;
DHT11 temperature and humidity sensor - 1;
Electrochemical formaldehyde sensor SH20 - 1;
0.96 inch OLED screen IIC yellow and blue color - 1;
white patch button - 3;
SMD electrolytic capacitor 220V 16V - 1;
2-pin plug-in Android power socket - 1;
SMD transistor 9012 - 1;
0805 SMD Capacitor 104 - 1;
0805 SMD Resistor 1K - 1;
0805 chip resistor 4.7K - 1;
M3x6 screws - 4;
M3x12 double-pass copper column - 4;
M3x5+3 single-pass copper column - 4;
PCB board - 1;
Shell - 1;
power cord - 4.
Display parameters-Pollution level:
0—0.020 mg/m3-Excellent;
0.020—0.050 mg/m3-Good;
0.050—0.080 mg/m3-Generally;
0. 080—0. 200 mg/m3-Light pollution;
0. 200—0. 500 mg/m3-Moderately polluted;
More than 0.500 mg/m3-Heavy pollution.
Cross Interference Characteristics:
The sensor module can respond to other parts of the gas except the target gas. The response characteristics of the sensor to several common interfering gases are listed in the following table for reference. The data in the table is the typical response of the gas at a given concentration.
