Use

Rugged and reliable gas detector for the   protection of personnel from toxic and Oxygen gas hazards. MkII version

suitable for use in Zone 1, 2, 21 or 22   hazardous areas and North American Class I and II Division 1 or 2 areas.

MkIII version suitable for use in Zone 0,   1, 2, 20, 21 or 22 applications.

Detectable Gases

Gas

Formula

Selectable Full

Scale Range

Default Range

Operating Temperature**

Min

Max

Oxygen

O2

25.0% / Vol only

25.0%Vol

-30°C / -22°F

55°C / 131°F

Hydrogen Sulphide

H2S

10.0 to 50.0ppm

15.0ppm

-40°C / -40°F

55°C / 131°F

Hydrogen Sulphide

H2S

50 to 500ppm

100ppm

-40°C / -40°F

55°C / 131°F

Carbon Monoxide

CO

100 to 500ppm

300ppm

-40°C / -40°F

55°C / 131°F

Sulphur Dioxide

SO2

5.0 to 20.0ppm

15.0ppm

-40°C / -40°F

55°C / 131°F

Ammonia*

NH3

50 to 200ppm

200ppm

-20°C / -4°F

40°C / 104°F

Ammonia*

NH3

200 to 1,000ppm

1,000ppm

-20°C / -4°F

40°C / 104°F

Chlorine

CI2

5.0 to 20ppm

5.0ppm

-10°C / 14°F

55°C / 131°F

Chlorine Dioxide

CIO2

1.00ppm only

1.00ppm

-20°C / -4°F

55°C / 131°F

Nitric Oxide

N0

100ppm only

1.00ppm

-20°C / -4°F

55°C / 131°F

Nitrogen Dioxide

NO2

5.0 to 50.0ppm

10ppm

-20°C / -4°F

55°C / 131°F

Hydrogen

H2

1,000ppm only

1,000ppm

-20°C / -4°F

55°C / 131°F

Hydrogen

H2

9,999ppm only

9,999ppm

-20°C / -4°F

55°C / 131°F

Hydrogen Chloride

HCI

10.0 to 20.0ppm

10ppm

-20°C / -4°F

40°C / 104°F

Hydrogen Cyanide

HCN

30.0ppm only

30.0ppm

-20°C / -4°F

55°C / 131°F

Hydrogen Fluoride

HF

12.0ppm only

12.0ppm

-20°C / -4°F

55°C / 131°F

Phosphine

PH3

1.2ppm only

1.2ppm

-20°C / -4°F

40°C / 104°F

Fluorine

F2

4.00ppm only

4.00ppm

-20°C / -4°F

55°C / 131°F

Ozone

O3

0.400ppm only

0.400ppm

-20°C / -4°F

55°C / 131°F

Ethylene Oxide

ETO

20.0 to 50.0ppm

25.0ppm

-20°C / -4°F

55°C / 131°F

Electrical

Connections and Power

MkII

MkIII

2-wire loop powered

17Vdc (±10%) to 32Vdc (max)

22mA max. over range

2 wire loop powered

10Vdc (±10%) to 30Vdc (max)

22mA max. overrange

Entity parameters for Barrier Selection:

Vmax/Ui = 30Vdc

Imax/Ii = 125mA

Pmax/Pi = 1.2W

Li = 0mH

Ci = 0µF

Recommended Cable

2-wire with screen (90% coverage) or   conduit

0.5mm2

 (20AWG) to 2.0mm2

 (14AWG)

Signal

0-100% FSD 4-20mA

Fault = 3mA

Calibration due selectable off or 3mA

Max. over range 22mA

Inhibit (toxic sensors) = Selectable 3mA   or 4mA

Inhibit (Oxygen sensors) = Selectable 3mA   or 17.4mA

Construction

Material

Transmitter: Epoxy painted aluminium   alloy LM25 or 316 Stainless Steel, Sensor: 316 Stainless Steel with PTFE   filter

Maximum Dimensions

164mm x 201mm x 99mm (6.4” x 7.9” x 3.9”)

Weight

Aluminium alloy LM25: 1.7kg (3.75lbs.)   Stainless Steel 316: 3.7kg (8.16lbs.)

Environmental

IP Rating

IP66 (EN 60529), NEMA 4X

Certified Temperature

ATEX/IECEX: -20°C to +55°C (-4°F to   +131°F) (MkIII -40°C to +55°C (-40°F to +131°F))

UL/c-UL: -40°C to +55°C (-40°F to +131°F)

Operating Humidity

Continuous 20-90% RH (non-condensing)   Intermittent 0-99% RH (non-condensing)

Operating Pressure

90-110kPa

Storage Conditions

15°C to 30°C (59°F to 86°F), 30-70% RH   (non-condensing)