CO/NO2
| Gas | Carbon Monoxide Nitrogen Dioxide |
| Formula | CO NO2 |
| CAS number | 630-08-0 10102-44-0 |
| Max. workplace concentration | 30 ppm 1.5 ppm |
| Relative density | 0.97  2.80  |
| Appearance | Colorless / odorless Colorless / pungent |
| Hazards | Toxic Dizziness |
The ME1250 Gas Sensor is a remote measuring unit for monitoring gas concentration of both carbon monoxide and nitrogen dioxide. These toxic gases are mainly found in the exhaust gas from gasoline engines (carbon monoxide) and diesel engines (nitrogen dioxide). The main areas of application are exhaust gas monitoring in garages, underground car parks, multi-storey car parks, car parks, car silos and car repair shops. The sensor is used to control ventilation and gas safety alarm systems according to local building code requirements.
More on: Exhaus Gas Warning Systems CO/NO2
The microprocessor-controlled electronics of the sensor, adapted to the specific properties of the measuring cell, enable fast and reliable signal processing. The measured gas concentration is transmitted to a Gas Control Panel, which can manage a large number of distributed gas sensors. Thanks to bus communication, only one cable is required, which can be continued from sensor to sensor. The ME 1250 Gas Sensor is also available with an analogue output signal of 4…20 mA. The measured gas concentration can thereby be processed by other PLC (Programmable Logic Controllers). In analogue mode, the output signal is limited to the higher of the two readings.
Advantages
- Sensor for combined measurement of carbon monoxide and nitrogen dioxide
- Automatic zero point calibration
- Active noise reduction on the measurement signal
- Linear measurement signal depending on the gas concentration
- High response sensitivity with short response time
- Selective and reliable measurement with a stable measurement signal and zero point
- Temperature-compensated measurement signal
- Long service life
For special applications CO and NO2 can be measured separately and with higher measuring range.
Technical Specifications
Versions
| Article code | 12BUS-CO/NO2-32 | 1250-CO/NO2-32 |
|---|---|---|
| Description | Gas Sensor ME 1250 CO/NO2 Bus communication | Gas Sensor ME 1250 CO/NO2 Analogue |
| Output signal | Bus communication with gas control panel | Analogue 4…20 mA Load max. 800 Ω at 24V input |
| Connection | 4-core cable U72M 1x4x0.6 mm Shielded | 3-core cable U72M 1x4x0.6 mm or CY 0.5 mm2 Shielded |
| Topology | Bus, tree or star topology | Star topology |
| Power | < 0.15 W | < 0.8 W |
Signal Processing
with Gas Control Panel
for PLC processing
without Gas Control Panel
Accessories
| Article Code | Description |
| 1250-REL | Relay module for single sensor ME 1250 |
| 1250-AIR-BOX | Ventilation duct add-on box for gas sensor ME 1250 |
| 1250-AIR-FLOW | Fitting hose connection for gas sensor ME 1250 |
| 1250-SUP | Mounting plate round pillars for gas sensor ME 1250 |
| 1250-SCHUTZ | Sun and weather protection for gas sensor ME 1250 |
Consumables
| Article code | Description | Lifespan |
|---|---|---|
| CELL-CO-M1000 | Measuring cell CO 20 mm (red) | up to 3 years |
| CELL-NO2-M5 | Measuring cell NO2 20 mm (blue) | up to 2 years |
Health hazards
| Carbon Monoxide | Symptoms |
|---|---|
| 200 ppm | Slight headache, dizziness |
| 400 ppm | Headache in the forehead region |
| 800 ppm | Dizziness and nausea, convulsions within 45 minutes |
| 1,600 ppm | Unconscious within 2 hours, possible death within 1 hour |
| 3,200 ppm | Dizziness/nausea for 10 minutes, death within 30 minutes |
1250-CO/NO2-32
