SENSORS FOR OXYGEN IN THE AIR MEASUREMENTS
COG-3At, COG-3Atz
COG-3At is used for continuous measurements of oxygen concentration in the air in % and temperature. It co-operates with specific meters designed for co-operation with this sensor and continuous work (CO-421A)
COG-3Atz is used for est measurements of oxygen concentration in the air in % and temperature, equipped with multi pin connector. It co-operates with specific portable meters designed for co-operation with this sensor (CO-411A)
Characteristic features:
- Has a built in KE-LF25 oxygen sensor made by company Maxell from Japan and a Pt-1000 temperature sensor.
- The sensor is maintenance free, doesn’t require membrane nor electrolyte replacing.
- Lifetime expectancy of the oxygen sensor – 5 years in standard conditions.
- May be used in atmosphere with presence of other gases, details given in the table below.
- Cable length to be agreed when placing the order.
TECHNICAL DATA
SENSOR’S PARAMETERS
| Parameter | Model LS-25LF | |
|---|---|---|
| Measuring range | 0 ÷ 30% | |
| Accuracy after calibration | ± 1% of full scale | |
| Work conditions | Atmospheric pressure | 811 hPa ÷ 1216 hPa |
| Temperature | 5 ÷ 40°C | |
| Relative humidity |
10 ÷ 80% RH without condensation |
|
| Response time ( T90%) | about 15 s | |
| External size of the housing | Φ = 35 mm, L = 75 mm | |
| Storing conditions | Temperature | -20°C ÷ 60°C |
| Relative humidity | 0 ÷ 100% RH | |
| Pressure | 507 ÷ 1520 hPa | |
In the environment temperature down to -10°C sensor stops working but is not freezing, below -20°C it will be damaged.
The sensor may be directly mounted to the meter’s housing, or hanged in the chosen by the user place and connected with the meter with cable of chosen length.
INFLUENCE OF DIFFERENT GASES ON THE SENSOR
| Type of the gas | Concentration | Influence on O2 measurement |
|---|---|---|
| Carbon dioxide | 100,00% | No influence |
| Hydrogen | 100 ppm | No influence |
| Hydrogen sulfide | 50,3 ppm | No influence |
| Nitric oxide | 467 ppm | No influence |
| Nitrogen dioxide | 517 ppm | +0,1 O2 |
| Sulphur dioxide | 46,6 ppm | No influence |
| Ammonia | 1,00% | No influence |
Temperature sensor: Pt-1000B platinum resistor
Accuracy in the range 0 ÷ 40°C: ±0,5° C