Overview
NV-0 model with advanced planar construction is comprised of heater and metal oxide semiconductor material of subminiature Al2O3 ceramic plate, fetch out electrode down-lead, encapsulation in metal base and cap. 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
- High sensitivity to CO,CH4 in wide range
- Small sizes, Long lifespan, Low cost, Simple circuit
Applications
Domestic CO leakage alarm, industrial CO gas alarm and portable CO detector.
Technical Specifications
| Model | NV-0 | ||
| Sensor Type | Flat Surfaced Semiconductor | ||
| Standard Encapsulation | Metal Cap | ||
| Target Gas | CO, CH4 | ||
| Detection range | 50~1000ppm CO,300~10000ppm CH4 | ||
| Standard Circuit Conditions | Loop Voltage | Vc | ≤10V DC |
| Heater Voltage | VH | 5.0V±0.1V AC or DC (High temp.) 1.5V±0.1V AC or DC (Low temp.) | |
| Heating Time | TL | 60S±1S (High temp.) 90S±1S (Low temp.) | |
| Load Resistance | RL | Adjustable | |
| Sensor character under standard test conditions | Heater Resistance | RH | 105Ω±10Ω (room tem.) |
| Heater consumption | PH | ≤240mW | |
| Sensitivity | S | Rs(in air)/Rs(in 100ppm CO)≥3 Rs(in air)/Rs(in 5000ppm CH4)≥3 | |
| Output voltage | Vs | 2.5V ~ 4.3V (in 100ppm CO) 2.0V ~ 4.0V (in 5000ppm CH4) | |
| Concentration Slope | α | ≤0.6(R300ppm/R50ppmCO) ≤0.6(R5000ppm/R1000ppm CH4) | |
| Environment Conditions | Operation Temp. | Tao | -10°C~50°C |
| Storage Temp. | Tas | -20°C~70°C | |
| Relative Humidity | RH | Less than 95%RH | |
| O2 concentration | O2 | 21%±1%(can’t be less than 18%) O2 concentration effects sensor’s performance. | |
| Preheat time | Not less than 48 hours |
