Product Description
EC 11 carbon monoxide sensor is a fuel cell type sensor. Carbon monoxide 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 carbon monoxide concentration and follows Faraday’s law. The carbon monoxide concentration can be determined by measuring the magnitude of the current.
Sensor Features
High sensitivity, high resolution, linear output; high stability, excellent anti-interference ability; low power consumption, small size, long life; environmentally friendly structural design; unique anti-leakage structure.
Main Applications
Home and commercial carbon monoxide concentration detection.
Technical Specifications Table 1
Product Model
EC11
Detection gas
Carbon monoxide (CO)
Detection range
0~1000ppm
Maximum measurement
limit
2000ppm
Sensitivity
1-3nA/ppm
Resolution
1ppm
Response time (T90)
<30S
Load resistance (recommended)
(500/1K2K)R
Repeatability
<3% output value
Output linearity
Linear
Zero drift (-20℃~40℃)
<5ppm
Temperature range
-20℃~50℃
Humidity range
15%~90%RH
Pressure range
Standard atmospheric pressure ±10%
Service life
2 years
Figure 1: Sensor structure diagram
Basic Circuit
Figure 2: EC 11 test circuit
Sensor Characterization
Figure 3: Sensor sensitivity and response recovery
Figure 4: Sensor linearity curve
Cross-interference characteristics
EC11 sensor can respond to other gases except target gas. The response characteristics of the sensor to several common interfering gases are listed in the table below for reference. The data in the table are typical responses of gases at given concentrations.
Table 2: Cross-interference characteristics
gas
concentration
EC11
Hydrogen sulfide
100ppm
0ppm
Ethylene
100ppm
80ppm
Nitric Oxide
35ppm
8ppm
Nitrogen dioxide
5ppm
0ppm
Ethanol
1000ppm
0ppm
Chlorine
10ppm
1ppm
Sulfur dioxide
20ppm
0.1ppm
hydrogen
500ppm
43ppm
Ammonia
50ppm
1ppm
Methyl chloride
5ppm
0ppm
Ethylene oxide
10ppm
0ppm
benzene
100ppm
1.5ppm
acetone
100ppm
3.5ppm
Precautions
- Leads can be welded during installation, but soldering is prohibited from contacting the sensor;
- Power-on aging time is not less than 30 minutes;
- Please do not disassemble the sensor at will;
- The sensor should avoid contact with organic solvents (including silicone rubber and other adhesives), coatings, pharmaceuticals, fuel oils and high-concentration gases;
- All electrochemical sensors cannot be completely encapsulated with resin materials, nor immersed in an oxygen-free environment for a long time, otherwise the performance of the sensor will be damaged;
- All electrochemical sensors cannot be used in environments containing corrosive gases for a long time, as corrosive gases will damage the sensors.
- When measuring the gas zero point, it must be done in a clean atmosphere;
- When testing and applying the sensor, vertical air intake from the front must be avoided;
- The air inlet of the sensor must not be blocked or contaminated;
- The sensor should not be subjected to excessive shock or vibration;
- Do not use if the casing is damaged or deformed;
- After long-term use in a high-concentration gas environment, it takes a long time to recover to the initial state;
- When the sensor is stored, the working electrode and the counter electrode should be in a short-circuit state;
- It is prohibited to use hot melt adhesive or sealant with a curing temperature higher than 80°C to encapsulate the sensor;
- It is prohibited to store or use the product in high concentration alkaline gas for a long time.
