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As a leading manufacturer in explosion-proof safety technology since 1995, Shaanxi ASTTAR Explosion-proof Safety Technology Co., Ltd. proudly presents the CJG10 CH4 Detector (Optical Interference Type). This instrument is specifically engineered for accurate methane concentration measurement in underground mines and tunnel environments. With over two decades of expertise and an annual export value exceeding US$50 million, our device combines precision optics with rugged durability to ensure worker safety in hazardous atmospheres.
Our factory, spanning 5,000–10,000 square meters, employs over 100 skilled professionals dedicated to quality control and innovation. The CJG10 utilizes the principle of optical interference to deliver reliable, drift-free readings even in challenging conditions. Whether for routine gas monitoring or emergency response, this detector offers unmatched stability and ease of use.
Key Features & Technical Specifications
Optical Interference Principle: No chemical sensors to replace; immune to poisoning from H2S or other gases.
High Accuracy: ±0.1% CH4 (within full range) ensures dependable measurement for safety decisions.
Durable Construction: Rugged aluminum alloy housing with IP54 ingress protection for dusty, damp mine conditions.
Intuitive Operation: Large LCD display with backlight, simple three-button control, and audible/visual alarms.
Long Battery Life: Rechargeable Li-ion battery provides 8+ hours of continuous operation.
Customizable Range: Standard 0-10% CH4, with options for 0-100% CH4 upon request.
Explosion-Proof Design: Suitable for use in Zone 1 and Zone 2 hazardous locations (certification available on request).
| Parameter | Specification |
|---|---|
| Detection Principle | Optical Interference |
| Measuring Range | 0 – 10% CH4 (standard), 0 – 100% CH4 (custom) |
| Accuracy | ±0.1% CH4 (0-1% CH4), ±0.5% CH4 (1-10% CH4) |
| Response Time (T90) | |
| Operating Temperature | -10°C to +40°C |
| Relative Humidity | ≤95% RH (non-condensing) |
| Power Supply | Rechargeable Li-ion battery (3.7V, 2400mAh) |
| Battery Life | ≥8 hours continuous use |
| Alarm Output | Audible (>85dB), visual red LED, vibration |
| Dimensions (L×W×H) | 150 × 80 × 40 mm |
| Weight | Approx. 0.6 kg |
| Explosion Protection | Explosion-proof design (Ex d I Mb equivalent upon request) |
Advantages Over Traditional Sensors
Unlike catalytic bead or electrochemical sensors, the optical interference method does not require oxygen for operation and is immune to sensor poisoning from sulfur compounds or siloxanes. This makes the CJG10 ideal for long-term monitoring in coal mines where background gases vary. The robust optical path is self-calibrating, reducing maintenance intervals and total cost of ownership. Additionally, the detector provides fast, linear response across the full methane concentration range, ensuring early warning of explosive levels.
Why Choose Shaanxi ASTTAR?
With 29 years of manufacturing excellence, our company has supplied explosion-proof safety equipment to over 50 countries across all continents. We hold ISO9001 and ISO14000 certifications, reflecting our commitment to quality and environmental management. Our factory operates with advanced CNC machining and automated assembly lines, ensuring consistent product quality. All CJG10 detectors undergo rigorous burn-in and performance testing before shipment.
Our experienced R&D team continuously improves the product based on field feedback. The CJG10 has been deployed in major mining operations in North America, South America, Eastern Europe, and Southeast Asia. We offer comprehensive after-sales support, including spare parts, calibration services, and remote troubleshooting. With shipping ports in Tianjin and Qingdao, we ensure timely delivery worldwide.
Contact us today for a quotation or technical consultation. Protect your workforce with reliable, optical interference methane detection – the smart choice for underground safety.
Frequently Asked Questions
Q1: What is the working principle of the CJG10 CH4 detector?
A: It uses optical interference technology. A light source passes through a gas chamber; the presence of methane changes the refractive index, causing interference fringe shifts that are detected and converted into concentration readings. No chemical reaction is involved.
Q2: Can this detector be used in other gases besides methane?
A: The CJG10 is specifically calibrated for methane (CH4). While it may respond to other hydrocarbons, cross-sensitivity can occur. For other gases, please contact our sales team for customized solutions.
Q3: What is the typical calibration interval?
A: We recommend calibration every 6 months under normal operation. The device includes zero and span adjustment functions. A calibration certificate is provided with each unit.
Q4: Is the CJG10 intrinsically safe or explosion-proof?
A: The CJG10 features an explosion-proof enclosure designed for use in underground mines. Specific certification like ATEX or IECEx can be provided upon request depending on your target market.
Q5: What is the battery life and charging time?
A: The built-in Li-ion battery supports ≥8 hours continuous operation. Full charging takes approximately 4 hours using the provided AC adapter. A low-battery alarm alerts the user.
Q6: Does the device come with a warranty?
A: Yes, standard warranty is 12 months from date of shipment. Extended warranty options are available. We also provide lifetime technical support.
Q7: Can I get a sample or small trial order before bulk purchase?
A: Absolutely. We accept sample orders (single unit) for evaluation. Lead time for sample is 5-7 working days. Bulk orders (≥50 pcs) enjoy quantity discounts.
Q8: How do I clean and maintain the optical window?
A: Use a soft, dry cloth to clean the external window. For internal contamination, please return to our service center. Avoid using solvents that may damage the coating.
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