ShenzhenYijiajie Electronic Co., Ltd.
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 1500 |
| Delivery Time | 5-8 days |
| Packaging Details | Palletized |
| Resolution | 0.5 ppm |
| Repeatability | <±2% per month |
| Load resistance | 5 to 30 Ω (recommended 10 Ω) |
| Operating temperature | -40℃ to +50℃ |
| Operating humidity | 15% to 95% RH (no condensation) |
| Size | Φ20.15 × 16.4 mm |
| Weight | 5g |
| Life | 24 months |
| Brand Name | YJJ |
| Model Number | 4CO-AF |
| Place of Origin | CHINA |
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 1500 |
| Delivery Time | 5-8 days | Packaging Details | Palletized |
| Resolution | 0.5 ppm | Repeatability | <±2% per month |
| Load resistance | 5 to 30 Ω (recommended 10 Ω) | Operating temperature | -40℃ to +50℃ |
| Operating humidity | 15% to 95% RH (no condensation) | Size | Φ20.15 × 16.4 mm |
| Weight | 5g | Life | 24 months |
| Brand Name | YJJ | Model Number | 4CO-AF |
| Place of Origin | CHINA | ||
| High Light | electrochemical CO sensor ，portable gas detection instrument ，fixed CO gas detector | ||
Product Description:
YJJ 4CO-AF Electrochemical Carbon Monoxide CO Sensor Portable / Fixed Gas Detection Instruments
Features:
I. Core Parameters (Standard Specifications) Table
Parameters Typical Value Explanation
Detected Gas CO (Carbon Monoxide) Specificity electrochemical detection
Detection Principle Triple-electrode electrochemistry Unbiased voltage, current-type output
Range 0~100 ppm (standard) Extended: 0~200 ppm
Overload ≤ 2000 ppm No damage within a short period
Sensitivity 200±50 nA/ppm Positive current signal
Resolution 0.5 ppm
Response Time (T90) ≤ 15 seconds
Zero Point Drift -1~+10 ppm (-20~50℃)
Repeatability <±2%/month
Load Resistance 5~30 Ω (recommended 10 Ω)
Operating Temperature -40℃ ~ +50℃
Operating Humidity 15%~95% RH (no condensation)
Size Φ20.15 × 16.4 mm 20mm standard industrial size
Weight Approximately 5g
Life Span Airborne > 24 months
Storage Sealed 0~20℃, 6 months
Guarantee 12 months
II. Key Advantages (Anti-interference)
Resistant to H₂ (Hydrogen) Interference: Less likely to give false alarms in H₂-containing environments (mining, garages, battery compartments)
Resistant to C₂H₄ (Ethylene), NH₃ (Ammonia) Interference: Suitable for chemical industries, cold storages, agriculture, and new energy scenarios
Low Temperature Stability: Can operate normally at -40℃, suitable for northern regions / cold storages
Low Power Consumption, Long Lifespan: Electrochemical without heating, preferred for portable devices
III. Typical Applications
Portable Gas Detector
Four-in-One / Single CO Detector (mining, chemical industries, municipal services)
Firefighters, underground operations, confined space safety
Fixed Industrial Monitoring
CO Monitoring in Boiler Rooms, Garages, Parking Lots
CO Leakage Alarm in Chemical, Synthesis Ammonia, Coking Plants
New Energy / Battery Safety
CO Monitoring in Lithium Battery Warehouses / Workshops (evaporation of electrolyte)
Environmental Protection / IAQ
Indoor Air Quality, Smoke Emission, Combustion Efficiency Monitoring
Special Scenarios
Cold Storage (resistant to NH₃), Landfill (resistant to H₂/S)
Risk Control of Vehicle Exhaust, Ship Cabins, Tunnel Ventilation
Specifications:
| Measurement range | 0-100 ppm |
| Overload | ≤ 2000 ppm |
| Sensitivity | 200 ± 50 nA/ppm |
| Response time (T90) | ≤ 15 seconds |
| Zero drift | -1 to +10 ppm |
Company Details
Business Type:
Manufacturer,Trading Company
Year Established:
2006
Total Annual:
900000-1000000
Employee Number:
50~80
Ecer Certification：
Verified Supplier
Yijiajie Electronics is a full range of silicon pressure sensors from the United States, FREESCALE/, GE, MEAS, SMI, and a full range of sensing and control products from the United States pressure, temperature and humidity, gas flow, current, Hall effect, etc., Japan HAMAMATSU flame, UV sensors, ph... Yijiajie Electronics is a full range of silicon pressure sensors from the United States, FREESCALE/, GE, MEAS, SMI, and a full range of sensing and control products from the United States pressure, temperature and humidity, gas flow, current, Hall effect, etc., Japan HAMAMATSU flame, UV sensors, ph...
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