DatasheetThe 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.
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 |