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Honeywell Analytics Searchline Excel Edge Open Path Infrared Gas Detector, TX SS M25 - SLXL-ESMGTX

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Honeywell Analytics Searchline Excel Edge Open Path Infrared Gas Detector, TX SS M25 - SLXL-ESMGTX

Honeywell Analytics Searchline Excel Edge Open Path Infrared Gas Detector, TX SS M25 - SLXL-ESMGTX


SLXL-ESMGTX Searchline Excel Edge Open Path Infrared Gas Detector, TX SS M25 by Honeywell Analytics

The Searchline Excel™ Edge Flammable Hydrocarbon gas detector delivers long-range coverage and protection for perimeter and fence-line monitoring.


Designed for long-range perimeter and fence line monitoring applications, the Searchline Excel™ Edge helps protect your people, facilities and processes from combustible gas leaks. When mounted at the edge/perimeter of your facility, it provides long-range monitoring and reliable detection in harsh and changing environments for protection and peace of mind.


The Searchline Excel™ Edge's innovative optical gas detection capabilities cover a longer range and see through even thick fog better than any other open path gas detectors whether NDIR or laser-based.


  • RELIABLE DETECTION: Fast response to flammable Hydrocarbon gas even in low visibility conditions. Advanced diagnostics including window clarity and alignment accuracy to enable maximum uptime and continuous site protection.
  • HEAVY DUTY OPERATION: Operates in harsh environments to maintain coverage. Advanced transmitter and receiver optics means that monitoring continues in thick fog long after other detectors cease to provide coverage.
  • LONG-RANGE MONITORING: Longest range site detection for fence line/perimeter monitoring up to 330 meters (1082 feet). Flat response over a range of target gasses; performance approved.
  • EASY TO USE: Honeywell Fixed Platform Universal Mount and advanced alignment scope makes for easy mechanical installation. Incorporates Bluetooth® connectivity for simplified, non-intrusive set-up and maintenance. Just pair the Searchline Excel™ Edge with our intrinsically safe, ruggedized mobile phone; then use the Honeywell Fixed Platform App to interact with the detector
  • AT-A-GLANCE INSTRUMENT STATUS: High Visibility LED HALO ring provides clear indication of device status.Automatic reporting with full logging of alarms, events and maintenance actions.
  • MULTIPLE OUTPUTS: Multiple outputs including 4-20mA, Relays, HART®, Modbus and Bluetooth® communication. Easily integrate the Searchline Excel™ Edge into your existing network.
Primary Gases (Performance approved 1, 2) Searchline Excel™ Edge will respond to a wide range of Hydrocarbon Gases as most of these gases absorb IR in the required wavelengths: Methane1, 2, Ethane1, Propane1, 2, Butane1, Pentane1, Hexane, Ethylene1, Propylene1; 1FM Performance Approved; 2DNV approved
Range 0–5 LEL.m; for ppm.m equivalents see manual
Recommended Alarm Setting Low 1 LEL.m; High 3 LEL.m; for ppm.m equivalents see manual
Recommended Minimum Alarm Setting 0.5 LEL.m; for ppm.m equivalents see manual
Path Length 60 m to 330 m (196 ft to 1082 ft)
Speed of Response T90 less than 3 seconds
Analog Output Signal 4–20 mA Normal operation, 1 mA Fault*, 2 mA Inhibit, 3 mA Warning, 21 mA Overrange. Linearized 0–5 LEL.m
Environmental Operating Temperature -55°C to +75°C (-67°F to +167°F); DNVGL-CG-0339 Location Class B
Storage Temperature Range -55°C to +75°C (-67°F to 167°F). DNVGL-CG-0339 Location Class B
Power Supply 24 Vdc nominal (18 Vdc to 32 Vdc)
Power Consumption (Average RMS) Transmitter: Above +30°C (+86°F) = 3.8 W; +30°C to -30°C (+86°F to -22°F) = 5.6 W; Below -30°C (-22°F) = 11.8 W
Receiver: Above +30°C (+86°F)= 3.0 W; +30°C to -30°C (+86°F to -22°F) = 4.8 W; Below -30°C (-22°F) = 7.4 W
Output Signals 4–20 mA with HART®, Fault relay, Alarm 1 relay, Alarm 2 relay, Modbus, Bluetooth® (range up to 20 m (66 ft), depends on mobile device and environmental conditions)
Relay Outputs Max. 32 Vdc/ac, max. 2 A resistive load
Humidity 0–99% Relative Humidity Non-condensing. DNVGL-CG-0339 Location Class B
Pressure 91.5-105.5 kPa (915–1055 mBar, non-compensated)
Repeatability ±0.4 LEL.m; for ppm.m equivalents see manual
Temperature Drift -40°C to +65°C (-40 °F to 149 °F) ±0.2 LEL.m @ zero
±0.5 LEL.m @3 LEL.m
Warm-up Time Less than 5 minutes (operational), less than 1 hour (fully stabilized)
Internal Battery Cell TLH-2450, 10-year lifetime (replaced only by authorized service)
Weight Searchline Excel™ Edge: Rx 6.1 kg (13.4 lb), Tx 6.0 kg (13.2 lb)
Universal Mounting Bracket: 3.1 kg (6.9 lb) Stainless Steel
Mount Plate Adaptor: 3.71 kg (8.18 lb) Stainless Steel
Dimensions Searchline Excel™ Edge: 103 mm dia x 325 mm x 180 mm (4.06 in dia x 12.8 in x 7.09 in)
Universal Mounting Bracket: 165 mm x 165 mm x 130 mm (6.5 in x 6.5 in x 5.12 in)
Mount Plate Adaptor: 210 mm x 210 mm x 127 mm (8.23 in x 8.23 in x 5 in)
Ingress Protection IP 66/67 (Type 4X, in accordance with NEMA 250); Resistance to salt mist and sulfuric atmosphere (15-60 minutes exposure to salt air/mist; 15-60 minutes to sulfuric atmosphere)
Safety Approvals cULus:
Class I, Division 1, Groups. B,C,D, T4, Ta -55°C to 75°C (-67°F to 167°F) Class II, Division 1, Groups. E,F,G, T4, Ta -55°C to 55°C (-67°F to 131°F) Class III Div. 1; Class I Zone 1 AEx db ia IIC T4 Gb, Ta -55°C to 75°C (-67°F to 167°F) Class I Zone 1 AEx db eb ia IIC T4 Gb, Ta -55°C to 75°C (-67°F to 167°F) Zone 21 AEx tb IIIC T100°C Db, Ta -55°C to 55°C (-67°F to 131°F); Um = 250 Vrms
IECEx ULD 18.0016X; Ex db ia IIC T4 Gb (for flameproof Ex d installations)
Ex db eb ia IIC T4 Gb (for increased safety Ex e installations) Ex tb IIIC 100°C Db
Tamb -55°C to 75°C (-67°F to 167°F); Um = 250 Vrms
Performance Approvals:
ANSI/FM/IEC/EN 60079-29-4
Functional Safety (SIL):
SIL 2 certified by TÜV (SÜD) to EN61508
Core Approvals:
EN 50270: (EMC) IEC/EN 61000-6-4; Radio Equipment Directive 2014/53/EU
IEC/EN/UL/CSA 61010 (Electrical Safety); FCC / IC; RoHS, China RoHS

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