FP-624D Combustible Gas Sensor

Manufacturer: Teledyne| Detcon
Detcon Combustible Gas Sensor, FP-624D
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FP-624D Combustible Gas Sensor

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

Model FP-624D features Detcon's MicroSafe intelligent electronics, nonintrusive 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 back more than 20 years. 

The sensor assembly includes the detector in stainless steel housing, a base connector board, an explosion proof enclosure (available in aluminum or stainless steel), a plug-in control transmitter circuit, and a splashguard with integral cal port. 

The packaging is Explosion Proof (Class I, Division 1 Groups B, C, D). 

Model FP-624D is equipped with a standard Analog 4-20 mA current signal equivalent to the sensor range of detection, RS-485 serial communications port, 3 alarm relays, one-man remote calibration, self-adjusting zero and span, and LED indicators for fault, alarm, and calibration status.

Specifications

Manufacturer

Accuracy

  • ± 3 % - for 0 to 50 % LEL
  • ± 5 % - for 50 to 100 % Lower Explosive Limit (LEL)

Approvals & Certifications

  • CSA Class I, Div. 1, Groups B, C, D (Tamb: -40° to 75° C), Class I, Zone 1, Group IIB + H₂
  • NRTL Class I, Div. 1, Groups B, C, D (Tamb: -40° to 75° C), Class I, Zone 1, Group IIB + H₂

Cable Length

  • Maximum

Circuit Protection

  • EMI/RFI Immunity - I/O Protection
  • Miswiring - I/O Protection
  • Over- Voltage - I/O Protection

Communication

  • Baud Rate: 9,600 bit/sec (9,600, N, 8, 1 Half-Duplex)
  • Modbus RTU
  • RS-485

Consumption

  • 68 mA (< 1.7 W) - for Normal Operation
  • 87 mA (2 W) - For, Max.

Display

  • 4-Digit LED Display

Electrical Connectors

  • 14 AWG (2.5 mm²)
  • 2-Wire Twisted-Pair Shielded Cable
  • 3-Wire Shielded Cable
  • Junction Box

Enclosure, Body Material

  • Stainless Steel

Environmental Protection

  • Explosion-proof
  • IP66
  • NEMA 4X

Humidity

  • 0 to 99 % Relative Humidity, Non-Condensing

Input Power

  • 12-28 Vdc

Loop Resistance

  • 1,000 ohms, Max.

Materials of Construction

  • 316 Stainless Steel - Junction Box
  • Aluminum - Junction Box

Measuring Range

  • 0 to 100 % Lower Explosive Limit (LEL)

Mounting

  • 5.5” (140 mm) Mounting Holes Center to Center

Operating Temperature

  • -40° to 75° C (-40° to 167° F)

Output

  • 0 mA - All Fault Diagnostics
  • 2 mA - In-Calibration
  • 22 mA - for Over-Range Condition
  • 4-20 mA - 0 to 100 % of Full Scale
  • Linear 4-20 mA DC

Relay Output

  • 3 Relays
  • 5 A at 250 Vac
  • 5 A at 30 Vdc

Repeatability

  • ± 3 % - for 0 to 50 % LEL
  • ± 5 % - for 50 to 100 % Lower Explosive Limit (LEL)

Response Time

  • T50 < 10 seconds
  • T90 < 30 seconds

RFI/EMI Protection

  • Complies with ISO 92.0.01

Sensor, Probe Type

  • Matched-pair Catalytic Bead - Sensor

Storage Temperature

  • -40° to 75° C (-40° to 167° F)

Zero Offset

  • < 5 % Per Year - Zero Drift

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

Documentation

Data Sheets

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