| Model | MP-4 | ||
| Sensor Type | Flat surfaced | ||
| Standard Encapsulation | Metal cap | ||
| Target Gas | CH4, Nature gas, marsh gas | ||
| Detection range | 300~10000ppm (methane, natural gas) | ||
| Standard Circuit Conditions | Loop Voltage | Vc | ≤24V DC |
| Heater Voltage | VH | 5V±0.1V AC or DC | |
| Load Resistance | RL | Adjustable | |
| Sensor character under standard test conditions | Heater Resistance | RH | 85Ω±15Ω (room temp.) |
| Heater consumption | PH | ≤350mW | |
| Sensitive resistance | RS | 1KΩ～20KΩ (in 5000ppm CH4) | |
| Sensitivity | S | Ro(in air)/Rs(5000ppm CH4)≥5 | |
| Concentration Slope | α | ≤0.6(R5000ppm/R1000ppm CH4) | |
| Standard test conditions | Temp. Humidity | 20℃±2℃；55%±5%RH | |
| Standard test circuit | Vc::5V±0.1V; VH: 5V±0.1V | ||
| Preheat time | Not less than 48 hours | ||
| O2 content | 21%（not less than 18%） O2 concentration effects initial value, sensitivity and repeatability. | ||
| Lifespan | 10 years | ||
After sale instructions
