CJR10/5 is an intrinsically safe portable dual-gas detection and alarm device designed exclusively for explosive gas environments in underground coal mines. It simultaneously and continuously measures the concentrations of methane (gas) and carbon dioxide.
It is widely applied in mining faces, return air roadways, heading faces, electromechanical chambers, sealed roadways, mine rescue patrols and other working areas to real-time monitor risks of methane over-limit and carbon dioxide accumulation, ensuring underground operation safety. Equipped with MA coal mine safety certification and explosion-proof certification, it can be directly taken underground for use.
Product Advantage
1. Dual-gas detection in one unit
Simultaneously measures methane and carbon dioxide, eliminating the need for two separate detectors and boosting inspection efficiency. Adopts diffusion sampling design for instant measurement.
2. Accurate and durable detection
Combination of catalytic and infrared sensors avoids mutual interference, features low zero drift and long service life. Measurement errors meet standard requirements, and test data can be stored and submitted.
3. Triple alarm reminder
Integrated sound, light and vibration alarms prevent missed hazard alerts even in noisy underground environments, with customizable alarm thresholds available.
4. Robust performance for underground conditions
Comes with mine explosion-proof certification and MA safety mark. IP65 dustproof and splashproof rating; rubber-coated housing resists drops and impacts, and works stably under wide temperature and humidity ranges.
5. Simple operation
One-touch calibration requires no special tools. Large display screen shows multiple parameters simultaneously for easy reading underground.
6. Portable & long battery life
Lightweight design allows belt mounting. Intrinsically safe lithium battery delivers long endurance to support full-shift underground operations.
7. Low maintenance cost & wide applicability
No frequent reagent replacement needed; universal spare parts. Complete certifications enable use in various coal mine roadways and mine rescue missions.
Technical Parameters
Category | Parameter | CH4 | CO2 |
Detection | Range | 0~10.0%VOL | 0~5.00%VOL |
Resolution | 0.01%VOL | 0.01%VOL | |
Response Time(T90) | ≤25s | ≤25s | |
Method | Diffusion / Infrared | Diffusion / Infrared | |
Accuracy | ±0.05~±0.30%VOL | ±0.10%VOL / 5%FS | |
Environment | Temperature | 0℃~40℃(Operating) / -40℃~60℃(Storage) | |
Humidity &Pressure | ≤98%RH(Non-condensing),80~116kPa | ||
Power | Battery &Duration | Intrinsically safe Li-battery,≥10 Working Hours | |
Structure | Specifications | OLED Display,LED+Buzzer Alarm,423g,IP65 | |
Certification | Explosion-proof | Exib I,MA &CMC Approved | |
Product Uses
1. Daily underground inspection: Real-time gas detection for mining faces, heading faces, return airways, corners and electromechanical chambers.
2. Special operation monitoring: Gas detection for roadway penetration, seal opening, ventilation recovery and blasting work.
3. Ventilation & gas management: Monitoring of goaf, drilling sites and gas drainage areas.
4. Mine rescue & emergency use: Rapid gas detection for underground disaster areas and rescue missions.
5. General engineering applications: Suitable for tunnels and non-coal mines with methane and carbon dioxide hazards.
FAQ
Q: What's the lead time for orders?
A: Within 20 days after first payment.
Q: Do you provide sample? Free or charge?
A:Free samples are available, courier cost is borne by the buyer.
Q: How do you guarantee quality?
A: Always a pre-production sample before mass production;
Always final inspection before shipment.
Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).
Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.
