Honeywell Searchline Excel Infrared Open Circuit Gas Detector

Honeywell Searchline Excel Infrared Open Circuit Gas Detector

Product Overview

Searchline Excel is the world's best-selling infrared open circuit gas detector, with over 25000 units installed in various challenging industrial applications. From the Arctic Circle to the deserts of the Middle East, it has always been the preferred product for customers and has become a standard configuration in the oil, gas, and petrochemical industries, meeting their demanding needs.

Application scenarios: including offshore platforms and vessels (FPSOs), downstream chemical processing plants, natural gas transportation and pipelines, large storage areas and buildings, perimeter inspections, etc.

Product Evolution: Honeywell Analytics launched the original Searchline in 1987, pioneering the design of open circuit infrared combustible gas detectors. Searchline Excel was launched in 1998 and became an industry standard through continuous improvement and high-quality manufacturing and control processes. It is often used in conjunction with Searchpoint Optima Plus as the primary combustible gas detector and auxiliary combustible point detector.

Core advantages and characteristics

Performance advantages

By using a dual bandpass filter, it can fully compensate for various fog, rain, and/or mist interferences.

100% unaffected by the sun, can work normally under partial shading conditions, and has strong anti vibration ability.

Radial symmetrical and bonded window heating, with good low-temperature performance; Coaxial optical systems provide the best performance and resistance to partial occlusion in their class.

Full temperature compensated solid-state detector with low power consumption under all conditions, equipped with a simple "locking" alignment tool, without the need for additional "software alignment".

The telescope is designed with higher power and sturdiness, and can be equipped with Modbus RS485 multi-point output. It has obtained FM hazardous area and performance certification.

Advantages of open circuit gas detection: As a supplement to point detectors, it has reliable combustible gas detection (verified through use), wider coverage (most likely to detect any leaks), extremely fast response speed, fail safe (no unexposed fault modes, no possibility of gas path blockage), less critical detector position, can indicate the magnitude of danger, simple setup and debugging, and can replace multiple point devices.

Unique technological design

Patent optical design: It is the only solution that can fully address all challenges of open circuit combustible gas detection, using patented dual bandpass filters that can operate accurately and reliably in all weather conditions without relying on software masks that may affect gas detection capabilities.

Coaxial optical design: The unique coaxial optical design makes it the only open circuit gas detector that can operate normally under partial shielding conditions without generating false alarms, while non coaxial instruments may experience false alarms due to differential attenuation.

True Alignment System: Good installation is the key to achieving optimal performance for open circuit gas detection systems. This system can achieve precise alignment without the need for software based alignment tools for further adjustments. During installation, a telescope is used to visually inspect the path to ensure there are no physical obstacles.

Accessories and Communication

Main accessories: including XNX universal transmitter (providing local display and enhanced interface options such as relays and modern digital communication, including HART) ®、 Modbus and Foundation Fieldbus ™）、 Unique and validated telescope installation mechanism (with simple engagement and locking mechanism, three-point installation reference to ensure true alignment, and adjustable line of sight to the most convenient position), etc.

Communication function: Can be combined with XNX universal transmitter kit, standard equipped with local HART ®  Ports and HART via 4-20mA ®， Can be accessed through the XNX user interface or compatible HART ®  Handheld interrogator configuration; In permitted applications, SHC-1 handheld interrogator and SHC-1 protective device module can be used for invasive connection with Searchline Excel. The multi-point Modbus function can significantly save installation and wiring costs, and the bidirectional digital communication protocol allows configuration, warning, and fault diagnosis information to be transmitted back to the control room, reducing maintenance costs.

Technical specifications

Project/Details

Detectable gases: methane, ethane, propane, butane, pentane, ethylene, propylene, butadiene

Range 0 to 5 LEL. m

Recommended alarm setting: (low) 1.0 LEL. m; (Height) 3.0 LEL. m

Path length: Short distance 5m to 40m (15ft to 130ft.), medium distance 40m to 120m (130ft to 390ft.), long distance 120m to 200m (390ft to 650ft.)

Response speed: T90 less than 3 seconds (under normal operating conditions)

Output signal: 4-20mA (maximum loop resistance of 600 ohms; Provide source and sink) and RS485, 21mA over range, 4-20mA normal operation (0 to 5 LEL. m), 3mA (1) optical components dirty, 2.5mA (1) beam blocked, 2mA (1), 0mA fault

Digital output: Modbus RS485 multipoint. Use DX100 (M) or XNX universal transmitter with Modbus option

Working humidity: 0 to 99% RH (non condensing)

Work pressure: 91.5 to 105.5 KPa (915 to 1055 mbar) (without compensation)

Preheating time: less than 5 minutes (operable), or less than 1 hour (completely stable)

Power supply: 18V to 32VDC

Power consumption short-range transmitter: 3.5W/5.0W * maximum. Medium to long distance transmitter: 10W/13W * maximum. Receiver: 8W maximum.

Shell material: 316 stainless steel

Weight (including installation bracket): Short distance transmitter: 3.5kg, medium to long distance transmitter: 7kg, receiver: 3.5kg

Vibration 2 to 60Hz, maximum peak to peak amplitude 1mm

Alignment tolerance: short distance ± 0.5 º (at 40m ±~35cm), medium distance ± 0.5 º (at 120m ±~104cm), long distance ± 0.5 º (at 200m ±~170cm)

EMC standard: EN50270

Performance certification: FM performance certification

Safety certification: ATEX, UL, CSA, FM and other certifications

IP rating: IP66 and IP67

Installation Options

Installation options: Provides multiple installation configurations to meet the different connection requirements of hazardous and safe areas, such as connecting with controllers, DCS/PLC, SCADA systems, etc. It supports communication methods such as 4-20mA and Modbus, and can achieve redundant 4-20mA signal transmission, local invasive/non-invasive inquiry, remote status transmission, and other functions.