Overview
NV-4D 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. When the target gas (alcohol) exists , The sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of gas concentration.
Key Features
- Lower consumption
- Small size
- Fast response and resume
- Highest sensitivity
- Excellent stability and long life
- Easy circuit and big signal output
- Excellent selectivity
Applications
It is used for detecting whether the driver and other people who drink alcohol, or detecting whether ethanol steamy exist in other places.
Technical Specifications
| Model | NV-4D | ||
| Sensor Type | Flat surfaced semiconductor | ||
| Standard Encapsulation | Metal cap | ||
| Target Gas | Alcohol gas | ||
| Detection range | 0~500ppm alcohol | ||
| Standard Circuit Conditions | Loop Voltage | Vc | ≤24V DC |
| Heater Voltage | VH | 2.5V±0.1V AC or DC | |
| Load Resistance | RL | Adjustable | |
| Sensor character under standard test conditions | Heater Resistance | RH | 23.5Ω±4.5Ω (room tem.) |
| Heater consumption | PH | ≤350mW | |
| Resistance of sensitive material | RS | 5KΩ~50KΩ(in50ppm C2H5OH) | |
| Sensitivity | S | Ro(in air)/Rs(50ppm C2H5OH)≥3 | |
| Concentration Slope | α | ≤0.6(R300ppm/R50ppmC2H5OH) | |
| Standard test conditions | Tem. Humidity | 22°C±2°C;55%±5%RH | |
| Standard test circuit | Vc:2.5V±0.1V VH:2.5V±0.1V | ||
| Preheat time | Not less than 48 hours |
