





| Technical Specifications | Parameter Details |
| Detection principle | TDLAS |
| Gas detection | CH4 |
| Detection method | Open-path |
| Detection scope | 0LEL·m~1LEL·m,0LEL·m~5LEL·m |
| Resolving power | 0.01LEL·m |
| Accuracy | ±5%F.S |
| Detection distance | 5-30m (near), 30-60m (medium), 60-100m (far) |
| Response time | T90≤3s |
| Sensor lifespan | ≥10years |
| Display method | LED digital display, LED indication |
| Alarm method | LED optical alarm; configurable explosion-proof audible and visual alarm (optional) |
| Alarm value | Low alarm: 0.5 LEL·m, High alarm: 0.75 LEL·m (0~1 LEL·m) Low alarm: 1 LEL·m, High alarm: 2 LEL·m (0~5 LEL·m) |
| Adjustment method | Infrared remote control |
| Source | 24V DC(15~32V DC) |
| Power dissipation | TX<10W(MAX),RX<8W(MAX) TX<10W(MAX),RX<8W(MAX) |
| Ambient temperature | -40℃ ~ +70℃ |
| Relative humidity | 0~99% RH / no condensation |
| Output signal | 4~20mA (three-wire) 4~20mA + HART (optional) RS485 Modbus (four-wire) Three relay switch outputs (2A 30V DC) 24V DC output (for driving audible and visual alarm) 4G/5G/NB-IoT/LoRa wireless communication (optional) |
| Electrical interface | Three interfaces, M25×1.5, NPT3/4″(F), NPT1/2″(F) |
| External dimensions | 253.6mmx101mmx151mm(LxWxH) |
| Weight | 6.380KG(TX); 6.430KG(RX) |
| Shell material | SS316 |
| Explosion proof signs | Ex db IIC T6 Gb Ex tb ⅢC T80℃ Db |
| Protection level | IP68 |
– TDLAS (Tunable Diode Laser Absorption Spectroscopy) technology, open-path beam measurement, large coverage area
– Optical sensing principle, short response time, high detection accuracy, long service life
– Precise laser wavelength matching, excellent gas selectivity, resistant to cross-interference from other gases
– Intelligent laser wavelength scanning, intelligent zero-point locking, zero false alarms, maintenance-free
– Real-time optical path status monitoring, eliminates condensation and icing on optical lenses, optical path obstruction alert
– Built-in reference gas cell, real-time intelligent laser diagnostics, automatic calibration, high reliability
– Strong infrared laser penetration, normal operation in heavy rain, dense fog, dust, snow and ice environments
– LED displays on-site gas concentration, LED indicates working status, integrated audible and visual alarm
– Opposing visible laser alignment indicator, convenient for installation and optical alignment of transmitter and receiver
– Explosion-proof infrared remote control, on-site remote adjustment and calibration


| Gas Name | CAS号 | 分子式 | 检测气体量程(Detection Range) | 检测精度(Detection Accuracy) | 响应时间(Response Time) | 爆炸下限 浓度(V%) |
| Methane | 74-82-8 | CH₄ | 0-50%LEL,50%LEL~100%LEL,0~100%LEL | 1%LEL | T90≤30s | 5.00 |
The products include gas sensors, gas detectors, gas alarm controllers and monitoring systems, gas analysis and pre-treatment systems,explosion-proof audio-visual alarm, flame detectors, and industrial HSE IoT.
Nuoan’s gas detectors provide instant, accurate alerts, protecting your people and assets 24/7.
Email: sales@nuoan.com
Phone: +86 19928876242
Address: 301, 1401, 1501, 1601, Building C1, No. 459, Qiaokai Road, Fenghuang Community, Fenghuang Street, Guangming District, Shenzhen, China (518107)