Searchline Excel open path infrared gas detector (hydrocarbon detection)
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The Searchline Excel open path infrared gas detector is an innovative and relevant solution for the detection of hydrocarbons over long distances. It is a device able to replace several point detectors over an up to 200 meters distance between the transmitter and the receiver.
The Honeywell Searchline Excel system includes a transmitter that produces infrared radiation and a receiver with optical sensors that electronically processes the signals. They are both incorporated in a resistant stainless steel frame for use in the harshest applications and environments. Detailed description
The open path gas detector
The Searchline Excel open path infrared gas detector was designed to detect hydrocarbons in an industrial environment. It is a particularly economical solution that can replace up to 20 fixed point gas detectors over a 200 meters distance. It is completely insensitive to sunlight or other interference radiation sources such as flares, arc welding, or lighting.
The transmitter lens is heated to minimize condensation effects, freezing and snow accumulation. When it is very cold, SMART heating increases significantly.
Why an open path gas detection system?
- Extended surveillance zone: greater likelihood of leak detection
- Very fast response time (T90 <3 seconds)
- High sensitivity which allows earlier alarms with lower thresholds
- Less strategic location of detectors
- Simple installation and commissioning, a single system replaces several point devices
Searchline Excel open path gas detector main assets
- Solid state detectors with full temperature compensation
- Dual bandpass filters that compensate interferences from all types of fog, rain and mist
- Symmetrical heating elements integrated into the windows offering excellent performance at low temperatures
- Insensitive to solar radiation
- Examples of gas leaks not detected by conventional point detectors but identified by an open path gas detector:
- Offshore platforms and ships (storage and unloading)
- Chemical and petrochemical plants
- Gas and oil pipelines
Honeywell Searchline Excel open path gas detector technical specifications
- Available gases: Methane, ethane, propane, butane, pentane, ethylene, propylene, butadiene
- Measuring range: 0 to 5 LELm * (lower explosion limit over a distance in meters).
- Recommended alarm parameters: 1.0 LELm and 3.0 LELm
- Trajectory lengths
- Short range: 5 to 40 m
- Medium range: 40 to 120 m
- Long range: 120 to 200 m
- Response time: T90 <3 sec. (under normal conditions)
- Power supply: 18 to 32 Vdc
- Power consumption :
- Short range: Transmitter: 5 W - Receiver: 8 W
- Medium and long range: Transmitter: 13 W - Receiver: 8 W
- Output signal:
- Linear 4-20 mA output source or sink (maximum loop resistance: 600 Ω)
- Modbus RS485 multipoint digital output.
- Housing material: 316 stainless steel
- Protection index: IP66 and IP67
- Operating temperature: -40 ° C to +65 ° C
- Operating humidity: 0 to 99% RH (non-condensing)
- Warm-up time: Less than 5 minutes (operational) or less than 1 hour (complete stabilization)
- Weight (mounting bracket included):
- Short range: Transmitter: 3.5 kg
- Medium and long range: Transmitter: 7 kg - Receiver: 3.5 kg
- Safety approvals: ATEX, IECEx, UL, CSA, FM, GOST Independent assessment for IEC61508
* To find out the LELm, simply multiply the size of a gas cloud by its concentration, so 1 LELm corresponds to 100% LEL over 1 meter or 50% LEL over 2 meters.
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