Overview
Sensitive material of NZ-9 gas sensor is SnO2, which with lower conductivity in clean air. When hydrogen 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.
NZ-9 gas sensor has high sensitivity to hydrogen gas, also has anti-interference to other gases. This sensor can detect hydrogen, especially city gas. It is a kind of low-cost sensor for kinds of applications.
Key Features
It has good sensitivity to hydrogen 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 leakage alarm, industrial flammable gas alarm and portable gas detector.
Technical Specifications
| Model | NZ-9 | ||
| Sensor Type | Semiconductor | ||
| Standard Encapsulation | Bakelite, Metal cap | ||
| Target Gas | Hydrogen | ||
| Detection range | 100~1000ppm(H2 gas) | ||
| Standard Circuit Conditions | Loop Voltage | Vc | ≤24V 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 tem.) |
| Heater consumption | PH | ≤950mW | |
| Sensitivity | S | Rs(in air)/Rs(in 1000ppm H2)≥5 | |
| Output Voltage | Vs | 2.5V~4.0V (in 1000ppm H2) | |
| Concentration Slope | α | ≤0.6(R1000ppm/R400ppmH2) | |
| 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 | ||
| O2 content | 21%(not less than 18%) O2 concentration effects initial value, sensitivity and repeatability | ||
| Life span | 10 years |
