Overview
Sensitive material of NZ-0D gas sensor is SnO2, which with lower conductivity in clean air. It detects carbon monoxide (1.5V) by method of cycle high and low temperature. At high temperature (5.0V), it can detect CO as well as clean the other gases adsorbed at low temperature. The sensor’s conductivity gets higher along with the CO and CH4 gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
Key Features
It has good sensitivity to carbon monoxide and methane in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Applications
It is widely used in the CO CH4 gas leakage alarm of civil, home kitchen and industrial and portable gas detector.
Technical Specifications
| Model | NZ-0D | ||
| Sensor Type | Semiconductor | ||
| Standard Encapsulation | Plastic cap | ||
| Target Gas | Carbon Monoxide, Methane | ||
| Detection range | 10~500ppm CO,300~10000ppm CH4 | ||
| Standard Circuit Conditions | Loop Voltage | Vc | 5.0V±0.1V DC |
| Heater Voltage | VH | 5.0V±0.1V AC or DC (High temp.) 1.5V±0.1V AC or DC (Low temp.) | |
| Heater Time | TL | 60S±1S (High temp.);90S±1S (Low temp.) | |
| 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 150ppm CO)≥5 Rs(in air)/Rs(in 5000ppm CH4)≥3 | |
| Output Voltage | Vs | 2.5V~4.3V (in 150ppm CO) 2.0V~4.0V (in 5000ppm CH4) | |
| Concentration Slope | α | ≤0.6(R300ppm/R50ppmCO) ≤0.6(R5000ppm/R1000ppmCH4) | |
| Standard test conditions | Tem. Humidity | 20°C±2°C;55%±5%RH | |
| Standard test circuit | Vc:5.0V±0.1V; VH(High temp.):5.0V±0.1V; VH(Low temp.):1.5V±0.1V | ||
| Preheat time | Over 48 hours | ||
| O2content | 21%(not less than 18%) O2 concentration effects initial value, sensitivity and repeatability. | ||
| Life span | 10 years |
