WATERPROOF OXYGEN METER CO-411A

Technical data

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The most important features

Measures oxygen in the air in % and temperature.
The display enables simultaneous readout of the measured function and temperature.

Detailed description

Designed for measurement of oxygen in the air in % and temperature.

Characteristic features:

Low weight and small size make working in the field easier.
Waterproof housing (IP-66) facilitates working in difficult conditions.
Meter co-operates with COG-3Atz sensor with built in KE-LF25 oxygen sensor and temperature sensor.
1 point calibration (in the air).
Memory of 50 results.
Automatic switch off function.
24 months of warranty for the meter.

Sensor characteristics:

The sensor is maintenance free, doesn’t require membrane nor electrolyte replacing.

Lifetime expectancy of the sensor – 5 years in standard conditions.

Sensor, after damage or use up, may be replaced by the user.

May be used in atmosphere with presence of other gases, details given in the table.

Standard cable length 1m, on order it may be changed.

TECHNICAL DATA
SENSOR’S PARAMETERS

Parameter		Model LS-25LF
Measuring range		0 ÷ 30% O₂
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.

INFLUENCE OF DIFFERENT GASES ON THE SENSOR (ACCORDING TO MANUFACTURER)

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

TECHNICAL DATA OF THE METER

Sensor calibration	1 point in the airr
Accuracy (±1 digit)	0,1%*
Memory	50 results
Dimensions (mm)	L=149 W=82 H=22
Weight	220 g
Power	9V battery optionally 12V / 100 mA power adapter
Connector	multi-pin

* Final accuracy is a sum of meter and sensor errors.