Overview
NV-8 adopts advanced planar construction production technics, using MOS material formed by micro AL2O3 ceramic tube and heater, electro-down-lead be fetched out, and are fixed into a metal base and cover. Adopting low and high temperature circling detection: when low temperature (VH=1.5V), it detects CO, Conductance of sensor bigger along with CO concentration in air; When high temperature(VH=5.0V), clean other gases, using simple circuit could change the conductance, change it to be output signal which relatively to the gas concentration.
Key Features
- High Sensitivity to CO
- Mini Size
- Fast response and resume character
- Excellent Stability and long life
Applications
- They are used in gas leakage detecting equipment in family, industry and commercial field, fire resistance/ safety detection system.
- CO gas leakage alarm and detector
Technical Specifications
| Model | NV-8 | ||
| Sensor Type | Flat surfaced | ||
| Standard Encapsulation | Metal cap | ||
| Target Gas | CO gas | ||
| Detection range | 50-1000ppm CO | ||
| Standard Circuit Conditions | Loop Voltage | Vc | ≤10V DC |
| Heater Voltage | VH | 5V±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 temp.) |
| Heater consumption | PH | ≤240mW | |
| Sensitivity | S | Ro(in air)/Rs(100ppm CO)≥3 | |
| Output voltage | VS | 2.5V~4.3V (in 100ppm CO) | |
| Concentration Slope | α | ≤0.6(R300ppm/R50ppmCO) | |
| Standard test conditions | Operation Temp. | Tao | -10°C~50°C |
| Storage Temp. | Tas | -20°C~70°C | |
| Relative Humidity | RH | <95%RH | |
| O2 content | 21%±1%(not less than 18%) O2 concentration effects initial value, sensitivity and repeatability. | ||
| Preheat time | Not less than 48 hours | ||
| Lifespan | 10 years |
