1. Description

  MQ-E3-CH2O formaldehyde sensor is a constant potential electrolytic sensor. Formaldehyde and oxygen undergo corresponding redox reactions on the working electrode and the counter electrode and release charges to form current. The magnitude of the current generated is proportional to the concentration of formaldehyde. The formaldehyde concentration can be determined by testing the magnitude of the current.

2. Appearance and dimension

3. Technical specifications

4.Sensor Characterization

Sensor sensitivity and response recovery:

Sensor linearity curve:

Sensor output at different temperatures:

Zero output of the sensor under different temperature conditions:

5.Precautions

 Soldering is prohibited during installation;

 The pins must not be broken or bent;

 Aging time should be no less than 24 hours before use;

 Electrolyte leakage may cause damage, so please do not disassemble the sensor at will;

 Avoid contact between the sensor and organic solvents (including silicone rubber and other adhesives), paints, chemicals, fuel oils and high-concentration gases;

 All electrochemical sensors must not be completely encapsulated with resin materials, nor immersed in an oxygen-free environment, otherwise the performance of the sensor will be damaged;

 All electrochemical sensors must not be used in environments containing corrosive gases, as corrosive gases can damage the sensor;

 When measuring the zero point of gas, it must be done in a clean atmosphere;

 When testing and applying the sensor, vertical air intake must be avoided from the front;

 The air intake surface of the sensor must not be blocked or contaminated;

 The waterproof and breathable membrane above the sensor must not be opened or damaged;

 The sensor must not be subjected to excessive impact or vibration;

 Do not use if the shell is damaged or deformed;

 It takes a long time to recover to the initial state after long-term use in a high-concentration gas environment;

 When storing a biased sensor, the working electrode and the reference electrode should be in an open circuit state;

 It is forbidden to encapsulate the sensor with hot melt adhesive or sealant with a curing temperature above 80℃;

 It is forbidden to store and use it in high-concentration alkaline gas for a long time.