Crowcon Smart S-SS

The Crowcon Smart S-SS is designed for industrial facilities where flammable, toxic and asphyxiant gas risks are part of everyday operations. Explosion-proof construction supports safe use in atmospheres up to gas group IIC, including hydrogen and acetylene, while an optional dust adapter extends protection to areas with combustible dust hazards. This enables standardisation on a single detector platform across mixed gas and dust zones.

Rugged enclosure options in die-cast, copper-free aluminium with chemically resistant epoxy paint or electropolished SS316 stainless steel withstand corrosive atmospheres and mechanical impact. A compact footprint and carefully managed weight across the 3A, 4A and 2S transmitter options support installation on pipe racks, structural steel and equipment skids where space and mounting points are limited.

Smart S-SS supports flammable gases, a wide range of toxic gases, oxygen, CO2, VOCs, SF6 and many refrigerants through a modular single-sensor head concept. Catalytic pellistor sensors provide excellent linearity up to 100% LFL with fast response times, helping safety systems react quickly to flammable gas leaks. Infrared sensors deliver immunity to poisoning and high selectivity for flammable, CO2 and refrigerant gases, improving stability in harsh or contaminant-rich environments.

Premium electrochemical cells offer high sensitivity and accuracy at low concentrations for toxic gases, supporting early warning strategies and tighter exposure control. PID options extend coverage to VOCs. A wide gas library with dedicated sensor heads for specific gases and ranges allows each detector to be matched precisely to the application, whether focused point-leak monitoring or wider area-leak coverage.

Platform standardisation across the site: Interchangeable sensor heads and common transmitter electronics enable one detector platform to cover diverse applications, simplifying engineering design, reducing spares inventory and streamlining training.

The Smart S-SS platform separates sensor head, electronics and enclosure selection, so each installation point can be configured to its specific risk, environment and cabling requirements. Multiple transmitter variants (3A, 4A, 2S) cover different enclosure sizes and entry configurations. Aluminium enclosures suit general industrial service where weight is critical, while larger SS316 stainless steel enclosures provide additional robustness for extreme or highly corrosive conditions.

Cable entry options using 3/4″ NPT threads and IP65 ingress protection align with common industrial cabling practices and protect against dust and water jets. This makes it easier to integrate Smart S-SS into existing fixed gas detection systems and control panels without extensive rework or custom hardware.

Smart S-SS supports analogue and digital communication to fit both modern and legacy architectures. A standard 4–20 mA output simplifies connection to fixed gas control panels, PLCs and DCS systems, while RS485 Modbus on all electronics versions enables multi-drop installations, remote status checks and centralised configuration.

Optional three-relay output boards provide local alarm and fault contacts where hardwired signalling to shutdown systems or beacons is required. An optional HART modem allows advanced diagnostics and configuration over the existing 4–20 mA loop, aiding commissioning, fault-finding and lifecycle management without additional wiring.

Service detectors in classified areas: Hall effect sensors enable non-intrusive magnetic calibration through the enclosure, so zero and span adjustments can be completed without opening the housing. This helps maintain explosion protection integrity, reduces the need for intrusive work in hazardous areas and can shorten permit processes and site visits.

Compatibility with enhanced external calibration keypads (STS/CKD+ and STS/CKD-OLED) further simplifies advanced configuration. These accessories support SD card-based firmware updates on compatible models, data logging and trend visualisation, enabling technicians to optimise detector performance and document settings without removing the detector from service.

Lower maintenance overhead: Typical service lives of several years for electrochemical sensors, longer lifetimes for catalytic sensors and extended life for infrared sensors allow planned maintenance intervals and fewer sensor replacements. Straightforward sensor head changes and modular electronics help minimise downtime during scheduled work.

Smart S-SS is built for continuous operation in aggressive gas atmospheres and extreme temperatures found in outdoor installations, processing areas and utility corridors. Stainless steel SS316 sensor heads resist corrosion in harsh chemical or marine environments, while IP65 protection and high humidity tolerance in non-condensing conditions support reliable performance in dusty or damp locations.

Fast response behaviour for flammable gas detection, tested to relevant performance standards, supports early leak recognition. Continuous monitoring is suited to both localised high-risk points and broader area coverage as part of an integrated fixed gas detection system in process plants, chemical facilities, refineries and other hazardous locations.

The Smart S-SS detector is certified for use in safety instrumented systems, with hardware and software developed to support defined safety integrity requirements. Explosion-proof Ex d and Ex t protection concepts, combined with recognised functional safety standards, allow integration into SIL-rated safety functions when applied in line with the safety manual.

Acoustic indication is intentionally omitted, aligning with modern practice where alarms, fault indications and evacuation instructions are coordinated through central panels, beacons and sounders rather than distributed at each detector. This focus on robust sensing, high-integrity signalling and flexible communications supports long-term, site-wide standardisation on a single fixed gas detection platform.