Crowcon Sensitron SMART S-MS 3A Gas Detector

Code: CRMS3A11
  • Flammable & toxic gas detection
  • Suitable for harsh environments
  • Approvals ATEX, IECEx

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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.

Order Information

3A Transmitter Exd Aluminum enclosure, electronics and features
CRMS3A11 Electronic with one output RS+4-20 mA
CRMS3A13 Electronic with one output RS+4-20 mA, relay card
CRMS3A17 Electronic with 1 out RS+4-20 mA, relay card, Modem Hart
SMART S HEADS FOR SMART S-SS & S-MS
PEL Industrial Pellistor
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
S4019ME METHANE sensor head,0-100%LFL(full scale 4.4% vol)
S4001ME METHANE sensor head, 0-100% LFL(full scale 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
SF6 & REFRIGERANT
S4152R32 R32 sensor head, 0-2000 ppm
S4026R134A R134a sensor head, 0-2000 ppm
S4027SF6 SF6 sensor head, 0-2000 ppm
S4031R125 R125 sensor head, 0-2000 ppm
S4032RYF R1234yf sensor head, 0-2000 ppm
S4153RZE R1234ze sensor head, 0-2000 ppm
S4033R404A R404A sensor head, 0-2000 ppm
S4034R407A R407A sensor head, 0-2000 ppm
S4034R407F R407F sensor head, 0-2000 ppm
S4154R449A R449A sensor head, 0-2000 ppm
S4035R507A R507A sensor head, 0-2000 ppm
S4036R410A R410A sensor head, 0-2000 ppm
S4155R417A R417A sensor head, 0-2000 ppm
S4156R448 R448 sensor head, 0-2000 ppm
Carbon Dioxide (CO2)
S4015CO2 CARBON DIOXIDE (CO2) sensor head, 0-2% Vol.
S4016CO2 CARBON DIOXIDE (CO2) sensor head, 0-5% Vol
S4017CO2 CARBON DIOXIDE (CO2) sensor head, 0-30% Vol.
ECS Premium Electrochemical Cell
S4005O2 OXYGEN (O2) sensor head, 0-25% Vol.
S4166CO CARBON MONOXIDE (CO) sensor head, 0-100 ppm
S4006CO CARBON MONOXIDE (CO) sensor head, 0-500 ppm
S4021CO CARBON MONOXIDE (CO) sensor head, 0-1000 ppm
S4022AM AMMONIA (NH3) sensor head, 0-100 ppm
S4007AM AMMONIA (NH3) sensor head, 0-200 ppm
S4008AM AMMONIA (NH3) sensor head, 0-1000 ppm
S4009HS HYDROGEN SULPHIDE (H2S) sensor head, 0-50 ppm
S4028HS HYDROGEN SULPHIDE (H2S) sensor head, 0-20 ppm
S4029HS HYDROGEN SULPHIDE (H2S) sensor head, 0-100 ppm
S4010NO NITRIC OXIDE (NO) sensor head, 0-100 ppm
S4089H2 HYDROGEN (H2) sensor head, 0-1000 ppm
S4168H2 HYDROGEN (H2) sensor head, 0-2000 ppm
S4169H2 HYDROGEN (H2) sensor head, 0-3000 ppm
PID Photo Ionisation Detector
S4158IL VOC sensor head (Isobutylene), 0-200 ppm
S4159IL VOC sensor head (Isobutylene), 0-2000 ppm
S4167IL VOC sensor head (Isobutylene), 0-20 ppm

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Title Size
SMART S-MS 3A Datasheet 6 MB

Additional information

Weight 0.190 kg

Specifications

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

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