Performance Specification

Combustible Gas

Range

0 to 100 % LEL or 0 to 5 % CH4

Resolution

1 % LEL or 0.05 % vol CH4

Reproducibility

3 % LEL, 0 % to 50 % LEL reading or 0.15 % CH4, 0.00 % to 2.50 % CH4

(normal temperature range)

5 % LEL, 50 % to 100 % LEL reading or 0.25 % CH4, 2.50 % to 5.00 % CH4(normal temperature range)

5 % LEL, 0 % to 50 % LEL reading or 0.25 % CH4, 0.00 % to 2.50 % CH4(extended temperature range)

8 % LEL, 50 % to 100 % LEL reading or 0.4 % CH4, 2.50 % to 5.00 % CH4(extended temperature range)

Response time

90% of final reading (Typical)

<15 seconds(pentane)

<10 seconds (methane)

(normal temperature range)

Oxygen

The oxygen sensor has built-in temperature compensation. However, if temperature shifts dramatically, the oxygen sensor reading may shift. Zero the device at the work place temperature for the least effect.

Range

0 to 30 vol.% O2*

Resolution

0.1 vol.% O2

Reproducibility

0.7 vol.% O2 for 0 to 30 vol.% O2

Response time

(Typical)

(90% of final reading)

<10 second (normal temperature range)

Sensor Cross-Sensitivity

The oxygen sensor has no common cross-sensitivities.

Carbon Monoxide

Range

0 - 1999 ppm (0 - 1999 mg/m3) CO

Resolution

1 ppm CO for 6 to 1999 ppm

Reproducibility

±5 ppm O or 10 % of reading, whichever is greater
(normal temperature range)

±10 ppm CO or 20 % of reading, whichever is greater

Response time
(Typical)

90% of final reading
<15 seconds (normal temperature range)

Test Gas Applied

Concentration (PPM) Applied

CO Channel %
Cross-sensitivity

Hydrogen Sulfide (H2S)

40

0

Carbon Monoxide (CO)

100

100

Nitric Oxide (NO)

50

84

Nitrogen Dioxide (NO2)

11

0

Sulfur Dioxide (SO2)

9

-4

Chlorine (Cl2)

10

0

Hydrogen Cyanide (HCN)

30

-5

Ammonia (NH3)

25

0

Toluene

53

0

Isopropanol

100

-8

Hydrogen (H2)

100

48

Hydrogen Sulphide

Range

0 - 200 ppm H2S

Resolution

1 ppm H2S, for 3 to 200 ppm H2S

Reproducibility

±2 ppm H2S or 10 % of reading, whichever is greater

(normal temperature range)

±5 ppm H2S or 10 % of reading, whichever is greater

Response time

90 % of final reading
< 15 seconds (normal temperature range)

Test Gas Applied

Concentration (PPM) Applied

H2S Channel %
Cross-sensitivity

Hydrogen Sulfide (H2S)

40

100

Carbon Monoxide (CO)

100

1

Nitric Oxide (NO)

50

25

Nitrogen Dioxide (NO2)

11

-1

Sulfur Dioxide (SO2)

9

14

Chlorine (Cl2)

10

-14

Hydrogen Cyanide (HCN)

30

-3

Ammonia (NH3)

25

-1

Toluene

53

0

Isopropanol

100

-3

Hydrogen (H2)

100

0

Hydrogen Sulphide Low Concentration (H2S-LC)

Range

0 - 100 ppm H2S

Resolution

0.1 ppm H2S

Reproducibility

±0.2 ppm H2S or 10 % of reading, whichever is greater (normal temperature range)

±0.5 ppm H2S or 20 % of reading, whichever is greater (extended temperature range)

Response time

90 % of final reading
< 15 seconds (normal temperature range)

Nitrogen Dioxide

Range

0 - 50 ppm NO2

Resolution

0.1 ppm NO2

Reproducibility

±1 ppm NO2 or 10% of reading, whichever is greater (normal temperature range)

±2 ppm NO2 or 20% of reading, whichever is greater (extended temperature range)

Response time
(Typical)

90% of final reading
<15 seconds (normal temperature range)

Sulfur Dioxide

Range

0 - 20 ppm SO2

Resolution

0.1 ppm SO2

Reproducibility

±1 ppm SO2 or 10% of reading, whichever is greater (normal temperature range)

±2 ppm SO2 or 20% of reading, whichever is greater (extended temperature range)

Response time
(Typical)

90% of final reading
<15 seconds (normal temperature range)

Hydrogen Resistant CO (CO H2-RES)

Range

0 - 2000 ppm CO

Resolution

1 ppm CO

Reproducibility

±5 ppm CO or 10% of reading, whichever is greater (normal temperature range)

±10 ppm CO or 20% of reading, whichever is greater (extended temperature range)

Response time
(Typical)

90% of final reading
<15 seconds (normal temperature range)

Hydrogen resistance <5%