Detcon Model FP-624D

Code: FP-624D
  • Flammable Gas Detector
  • Catalytic Sensor
  • Easy to use

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The Detcon model FP-624D by Teledyne is a “Smart” gas detection sensor designed to detect and monitor combustible gas in the air over the range of 0-100% LEL (lower explosive limit) using matched-pair catalytic bead technology.

Model FP-624D features Detcon’s MicroSafeTM intelligent electronics, non-intrusive operator interface and comprehensive fault diagnostics. The sensor transmitter features an advanced universal design that fits all existing Detcon matched-pair catalytic bead sensors dating over 20 years. The sensor assembly includes the detector in a stainless steel housing, a base connector board, an explosion-proof enclosure (available in aluminium or stainless steel), a plug-in control transmitter circuit, and a splashguard with an integral cal port. The packaging is Explosion Proof (Class I, Division 1, Groups C & D).

Equipped with a standard analogue 4-20 mA current signal equivalent to the sensor range of detection, RS-485 serial communications port, two alarm relays and one fault relay, one-person remote calibration, self-adjusting zero and span, and LED indicators for fault, alarm, and calibration status. Detcon’s combustible gas sensor has an infinite shelf life and is supported by a 2-year warranty.


  • Performance Certified to CSA 152 cCSAus for Class I, Division 1, Groups C & D
  • Transmitter design fits all existing Detcon Catalytic Bead Sensors dating back 20 years
  • Compatible with PLCs, SCADA, DCS, via 4-20 mA, and/or RS485, and/or alarm relays
  • Sensor status and parameters accessible via RS-485 (Modbus)
  • Menu programmable relays standard (two alarms plus fault)
  • Simple menu-driven calibration – less than 3 minutes
  • LED display with LED indicators for FAULT and CAL status
  • Plug-in field-replaceable transmitter
  • Long sensor life: averaging +5 years in harsh offshore drilling/production environments
  • High resistance to poisons such as sulfides, chlorides, silicon-based contaminants etc.
  • Low power consumption (less than 3.5 watts versus 8+ watts on competitive brands)
  • Extensive Fault diagnostics


  • Oil and Gas Drilling Rigs
  • Oil and Gas Production Sites
  • Offshore Production Platforms
  • FPSOs
  • LNG/CNG Plants
  • Refining and Petrochemical
  • Pulp and Paper Mills
  • Waste Water Treatment Plants

Order Information

966-524520-100 FP-624D Catalytic Combustible Gas Sensor Assembly Alum condulet
966-52452B-100 FP-624D Catalytic Combustible Gas Sensor Assembly 316SS condulet
9H6-524520-100 FP-624D-HRT Catalytic Combustible Gas Sensor Assembly Alum condulet with Hart
9H6-52452B-100 FP-624D-HRT Catalytic Combustible Gas Sensor Assembly 316SS condulet with Hart

Spare parts

370-201600-000 Combustible gas field replaceable plug-in sensor
926-5255D0-100 Plug-in transmitter module (Model FP-624D)
926-525HD0-100 Plug-in transmitter module (Model FP-624D) with Hart
500-001794-004 Standard connector board Model series 600 sensors
612-820000-000 Stainless steel LEL sensor housing with threaded insert
399-602016-000 Stainless steel LEL sensor housings including plug-in sensor
613-120000-700 Sensor splash guard with integral cal-port – FP/DM/IR
943-000006-132 Calibration adapter FP/IR/DM/O2
975-000020-890 Sensor Duct Mount Kit LEL
612-400000-000 Sensor/Sintered Filter replacement wrench FP/DM/IR
943-002273-000 Harsh location dust guard (fits 1.5 x 18 thread)
033-003238-000 “Harsh location dust guard replacement filter for 1.5 x 18 thread (Sold in a pack of qty 20)

Model Series 600 Spare Parts – Universal

327-000000-000 Magnetic programming tool
960-202200-000 Condensation prevention packet (for J-Box replace annually)
437-500000-000 Stainless steel tag
943-004223-000 2″ pipe mount with sunshade
943-004221-000 Sensor Mounting Plate for 2” pipe
975-225007-006 Remote sensor Separation Jbox, aluminium, six-wire terminal strip
975-316007-006 Remote sensor separation Jbox, 316 stainless steel, six-wire terminal strip
897-850901-010 Standard aluminium junction box with lens cover
897-850901-316 Standard 316SS junction box with lens cover
943-003436-000 Harsh location water guard
943-000000-000 Calibration Sleeve/Wind Guard for use with a splash guard

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Title Size
fp-624d brochure 97 KB
fp-624d user manual 965 KB

Additional information

Weight 0.09 kg