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

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

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 has SIL2 hardware and SIL3 software with a redundant system; the hardware is SIL3.

3A Transmitter – Exd Aluminum Enclosure

Electronics & Features

Code	Description
CRMS3A11	Electronic with one output RS485 + 4-20 mA
CRMS3A13	Electronic with one output RS485 + 4-20 mA, relay card
CRMS3A17	Electronic with one output RS485 + 4-20 mA, relay card, Modem HART

SMART S Heads (S-SS & S-MS)

PEL Industrial Pellistor

Code	Description
S4003ME	METHANE sensor head, 0-100% LFL
S4003GP	LPG sensor head, 0-100% LFL
S4003PR	PROPANE sensor head, 0-100% LFL
S4003BU	BUTANE sensor head, 0-100% LFL
S4003VB	PETROL VAPOURS sensor head, 0-100% LFL
S4003AT	ACETONE sensor head, 0-100% LFL
S4037AC	ACETYLENE sensor head, 0-100% LFL
S4003AM	AMMONIA sensor head, 0-100% LFL
S4003CP	CYCLOPENTANE sensor head, 0-100% LFL
S4003EN	ETHANE sensor head, 0-100% LFL
S4003AE	ETHYL ACETATE sensor head, 0-100% LFL
S4003ET	ETHYL ALCOHOL sensor head, 0-100% LFL
S4003EL	ETHYLENE sensor head, 0-100% LFL
S4003EP	HEPTANE sensor head, 0-100% LFL
S4003ES	HEXANE sensor head, 0-100% LFL
S4003H2	HYDROGEN sensor head, 0-100% LFL
S4003IB	ISO BUTANE sensor head, 0-100% LFL
S4002P8	JP8 sensor head, 0-100% LFL
S4003MT	METHYL ALCOHOL sensor head, 0-100% LFL
S4003MK	METHYL ETHYL KETONE (MEK) sensor head, 0-100% LFL
S4003PE	PENTANE sensor head, 0-100% LFL
S4003PP	PROPYLENE sensor head, 0-100% LFL
S4003PN	PROPYL ALCOHOL sensor head, 0-100% LFL
S4003ST	STYRENE sensor head, 0-100% LFL
S4003TO	TOLUENE sensor head, 0-100% LFL
S4003XI	XYLENE sensor head, 0-100% LFL

IRS Infrared Technology – Flammable Gases

Code	Description
S4019ME	METHANE sensor head, 0-100% LFL (FS 4.4% vol)
S4001ME	METHANE sensor head, 0-100% LFL (FS 5% vol)
S4004PR	PROPANE sensor head, 0-100% LFL
S4004BU	BUTANE sensor head, 0-100% LFL
S4004AT	ACETONE sensor head, 0-100% LFL
S4004BN	BUTADIENE sensor head, 0-100% LFL
S4004CE	CYCLO HEXANE sensor head, 0-100% LFL
S4004DT	DIMETHYL ETHER sensor head, 0-100% LFL
S4004EN	ETHANE sensor head, 0-100% LFL
S4004AE	ETHYL ACETATE sensor head, 0-100% LFL
S4004ET	ETHYL ALCOHOL sensor head, 0-100% LFL
S4004EP	HEPTANE sensor head, 0-100% LFL
S4004ES	HEXANE sensor head, 0-100% LFL
S4004IB	ISO BUTANE sensor head, 0-100% LFL
S4004IL	ISOBUTYLENE sensor head, 0-100% LFL
S4004IP	ISOPROPYL ALCOHOL sensor head, 0-100% LFL
S4004PE	PENTANE sensor head, 0-100% LFL
S4004PP	PROPYLENE sensor head, 0-100% LFL
S4004TO	TOLUENE sensor head, 0-100% LFL
S4004DE	R152a DIFLUOROETHANE sensor head, 0-100% LFL
S4157R454B	R454B sensor head, 0-100% LFL
S4065R32	R32 DIFLUOROMETHANE sensor head, 0-100% LFL
S4066RYF	R1234yf sensor head, 0-100% LFL
S4067RZE	R1234ze sensor head, 0-100% LFL