The Net Safety SC311 Infrared Combustible Gas Sensors provide fast, reliable hydrocarbon gas LEL detection for demanding industrial environments. Designed for use with the Millennium II Series transmitters, the SC311 uses infrared sensing technology to detect combustible hydrocarbon gases with strong accuracy, fast response times and long-term sensor performance.
The SC311 is well suited for facilities that require dependable fixed gas detection in hazardous or harsh operating conditions. Its infrared design is immune to poisoning and supports field-selectable gas curves for common hydrocarbon gases, including methane, propane, butane, ethane, ethylene, pentane and hexane. With a typical sensor life of 8 to 10 years, a five-year warranty, periodic bump testing and a simple annual calibration sequence, the SC311 helps reduce maintenance demands while supporting reliable site safety.
Available through Westech Industrial in BC, AB and SK, the Net Safety SC311 can be supported by our experienced technical and service teams. Westech can assist with product selection, transmitter compatibility, replacement requirements, service support and custom fabrication capabilities for integrated fixed gas detection systems and project-specific installation needs.
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Description
Infrared Hydrocarbon LEL Gas Detection
The SC311 uses infrared sensing technology to detect hydrocarbon combustible gases from 0–100% LEL. Therefore, facilities can monitor flammable gas hazards in demanding industrial areas with confidence. This infrared combustible gas sensor supports fixed gas detection where accuracy, speed, and reliability matter.
Field-Selectable Gas Curves
The SC311 supports field-selectable gas curves for several common hydrocarbon gases. As a result, users can configure the sensor for the gas hazard present onsite. Standard gases include methane, propane, n-butane, iso-pentane, n-pentane, ethane, iso-butane, ethylene, and hexane. This flexibility helps facilities standardize gas detection equipment across different operating areas.
Fast Response and Reliable Accuracy
The SC311 responds quickly when combustible gas is present. It provides response times of T50 ≤ 4.3 seconds, T60 ≤ 7 seconds, and T90 ≤ 11 seconds. In addition, the sensor provides accuracy of ±5% LEL. It also offers repeatability of ±2% LEL full scale, supporting consistent readings during routine operation.
Dual-Beam Optical Design
The SC311 uses high-resolution, dual-beam optics to support reliable sensor performance. This design helps reduce problems caused by fouling, fogging, or misalignment. Additionally, the optical design helps lower power consumption. Lower power requirements can support efficient operation across larger gas detection systems.
Long Sensor Separation
The SC311 can operate up to 2,000 feet / 600 metres from the transmitter. Users can achieve this separation with 18 AWG cabling. As a result, facilities can place the sensor where gas detection works best. Meanwhile, they can mount the transmitter in a more accessible location.
Millennium II Transmitter Compatibility
The SC311 works with Net Safety Millennium II Series transmitters, including the M21, M22, and M2B. Therefore, facilities can use it within single or dual channel gas detection configurations. This compatibility allows users to combine toxic and combustible gas sensors on one transmitter platform.
Built for Extreme Industrial Environments
The SC311 supports demanding industrial applications with rugged aluminum or stainless steel housing options. It operates in temperatures from -40 °F to +167 °F. It also supports 0–95% RH non-condensing humidity conditions. Because of this durability, the infrared combustible gas sensor performs in harsh field environments.
Continuous Diagnostics and Environmental Compensation
The SC311 includes continuous self-checking for key performance parameters. It also compensates for temperature, pressure, and humidity changes. Together, these features help maintain dependable sensor performance over time. They also support confidence in changing environmental conditions.
Reduced Maintenance Requirements
The SC311 helps reduce routine maintenance demands compared with some traditional combustible gas detection technologies. It requires only periodic bump testing and a simple annual calibration sequence. In addition, the sensor includes a five-year warranty. With a typical sensor life of 8–10 years, it supports long-term fixed gas detection planning.
Applications
The Net Safety SC311 Infrared Combustible Gas Sensor is designed for fixed gas detection applications where hydrocarbon combustible gas hazards may be present. It is a strong fit for industrial facilities that require durable LEL gas detection, flexible sensor placement and compatibility with Millennium II gas detection transmitters.
Potential applications include:
- Oil and gas processing facilities
- Petrochemical and refining environments
- Gas compression and process areas
- Industrial facilities with methane, propane, butane, ethane, ethylene, pentane or hexane hazards
- Hazardous areas requiring fixed combustible gas detection
- Remote sensor installations where transmitter separation is required
- Single or dual channel gas detection systems using Millennium II transmitters
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