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Operating Principle

3-electrode electrochemical

Measurement Range

0-20 ppm SO2

Maximum Overload

150 ppm SO2

Filter

To remove H2 S

Filter Capacity

1000 ppm hrs @ 25 ppm H2 S

Sensitivity

0.5 ± 0.1 μA/ppm

Response Time (T90）

< 25 Seconds at 20OC

Baseline Offset (clean air)

-0.2 to +0.5 ppm equivalent

Zero Shift (+20°C to +40°C)

< 0.1 ppm equivalent

Repeatability

< ±2% of signal

Linearity

Linear over measurement

range 0-20 ppm and within ±5%

ELECTRICAL

Recommended Load Resistor

10 ?

Bias Voltage

Not required

Resolution

Dependent on electronics. (0.1 ppm when using

recommended electronics)

MECHANICAL

Housing Material

Noryl 110

Weight

Approx. 4.5 g

Orientation

Any

ENVIRONMENTAL

Typical Applications

Portable life safety

Operating Temperature Range:

Continuous

-20°C to +50°C

Intermittent

-40°C to +55°C

Lifetime will be reduced if regularly exposed to extremes of temperature

Recommended Storage Temp

0 - 20°C

Operating Pressure Range

1 atm ± 20%

Operating Humidity Range

15% to 90%RH non-condensing.

Extended exposure to extreme humidity conditions will degrade sensor performance.

INTRINSIC SAFETY DATA

Maximum current at 150 ppm

0.1 mA

Maximum o/c Voltage

< 0.75 V

Maximum s/c Current

< 1.0 A

LIFETIME

Long Term Output Drift

< 5% per annum

Expected Operating Life

2 years in clean air

Storage Life

6 months in original packaging

Standard Warranty

12 months from date of despatch