SMART S-MS 3A

The SMART S-MS 3A is a SIL2 certified fixed gas detector designed to meet the toughest industrial standards.

The detector is made for the requirements of heavy industries and comes with the option of aluminium or stainless steel enclosure and Optional HART and 3-relay card. The device is SIL2 Hardware and SIL3 Software certified

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Overview

The SMART S-MS 3A is a SIL2 certified fixed gas detector ideal for flammable and toxic gas detection

Made for heavy industries

Designed to meet the toughest industrial standards across oil and gas, refining and petrochemical industries.

System personalisation

Choice of sensor head based on the gas to be detected
Choice of transmitter (3-relay board, HART modem)
Choice of enclosure (aluminium / steel, number of entrances)

Safety Integrity Level (SIL) certification

SMART S-MS 3A is SIL2 hardware and SIL3 software; with a redundant system also the hardware is SIL3.

Specification

Size	H145 x W187 x D108 mm (5.7 x 7.4 x 4.25ins)
Weight	1.5kg
Enclosure material	Die-cast aluminium with colour and chemically resistant epoxy paint
Ingress Protection	IP65
Connection	2 or 3 x 3/4” NPT
Power	12-24 Vdc
Display	None
Electrical output	Analogue 4-20 mA output; RS485 serial output; 3 relay board (optional); HART modem (optional)
Operating temperature	-40 / +65°C (catalytic sensor) -30 / +55°C (electrochemical sensor)
Humidity	20 / 90% RH @40°C (catalytic sensor) 15 / 90% RH non-condensing (electrochemical sensor)
Response time	t90 < 60 s ; t50 < 20 s
Performance	Tested in accordance with EN 60079-29-1 standard
Functional safety	SIL2 hardware and SIL3 software
Approvals	ATEX, IECEx Ex db IIC T5 Gb

Gases

	Sensor type
Acetone (C₃H₆O)	Catalytic pellistor
Acetylene (C₂H₂)	Catalytic pellistor
Ammonia (NH₃)	Catalytic pellistor / Electrochemical
Butane (C₄H₁₀)	Catalytic pellistor
Carbon Monoxide (CO)	Electrochemical
Cyclopentane (C₅H₁₀)	Catalytic pellistor
Ethane (C₂H₆)	Catalytic pellistor
Ethanol (C₂H₆O)	Catalytic pellistor
Ethyl Acetate (C₄H₈O₂)	Catalytic pellistor
Ethylene (C₂H₄)	Catalytic pellistor
Heptane (C₇H₁₆)	Catalytic pellistor
Hexane (C₆H₁₄)	Catalytic pellistor
Hydrogen Sulphide (H₂S)	Electrochemical
Hydrogen (H₂)	Catalytic pellistor / Electrochemical
ISO Butane (C₄H₁₀)	Catalytic pellistor
JP8	Catalytic pellistor
LPG	Catalytic pellistor
Methane (CH₄)	Catalytic pellistor
Methanol (CH₃OH)	Catalytic pellistor
Methyl Ethyl Ketone (MEK)	Catalytic pellistor
Nitric Oxide (NO)	Electrochemical
Oxygen (O₂)	Electrochemical
Pentane (C₅H₁₂)	Catalytic pellistor
Petrol Vapours	Catalytic pellistor
Propane (C₃H₈)	Catalytic pellistor
Propyl alcohol (C₃H₈O)	Catalytic pellistor
Propylene (C₃H₆)	Catalytic pellistor
Styrene (C₈H₈)	Catalytic pellistor
Toluene (C₇H₈)	Catalytic pellistor
Xylene (C₈H₁₀)	Catalytic pellistor