Overview
Sensitive material of NZ246 gas sensor is SnO2, which with lower conductivity in clean air. When target pollution gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
NZ246 gas sensor has high sensitivity to ammonia gas, sulfide, benzene series steam, also can monitor smoke and other toxic gases well. It can detect kinds of toxic gases and is a kind of low-cost sensor for kinds of applications.
Key Features
It has good sensitivity to toxic gas in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Applications
It is widely used in domestic gas alarm, industrial gas alarm and portable gas detector.
Technical Specifications
| Model | NZ246 | ||
| Sensor Type | Semiconductor | ||
| Standard Encapsulation | Bakelite, Metal cap | ||
| Target Gas | ammonia gas, sulfide, benzene series steam | ||
| Detection range | 10~1000ppm( ammonia gas, toluene, hydrogen, smoke) | ||
| Standard Circuit Conditions | Loop Voltage | Vc | 5.0V±0.1V DC |
| Heater Voltage | VH | 5.0V±0.1V AC or DC | |
| Load resistance | RL | Adjustable | |
| Sensor character under standard test conditions | Heater Resistance | RH | 30Ω±3Ω (room temp.) |
| Heater consumption | PH | ≤950mW | |
| Sensitivity | S | Rs(in air)/Rs(in 400ppm H2)≥5 | |
| Output Voltage | Vs | 2.0V~4.0V(in 400ppm H2) | |
| Concentration Slope | α | ≤0.6(R400ppm/R100ppmH2) | |
| Standard test conditions | Tem. Humidity | 20°C±2°C;55%±5%RH | |
| Standard test circuit | Vc:5.0V±0.1V; VH: 5.0V±0.1V | ||
| Preheat time | Over 48 hours | ||
| Oxygen content | 21% (not less than 18%,O2 concentration effects initial value, sensitivity and repeatability. | ||
| Life span | 10years |
