Karf&Scoot GDSFX Ex-Proof Gas Detector with Catalytic (Pelistor) Sensor

It is used to quickly detect flammable and explosive gases. It is an ATEX- and IECEx-certified gas detection solution suitable for use in potentially explosive atmospheres. It integrates easily into your safety system thanks to its relay outputs, 4–20 mA analog signal output, and Modbus RS485 signal output.

Quick Look

Input: 16V ~ 32V DC (24V DC nominal)

Outputs: 3 Relays, 1 4–20 mA Analog Output, 1 Modbus Output

Compliance: ATEX, IECEx Certified (Zone 1, Zone 2)

IP65 Water and Dust Resistance

Durable Aluminum Housing

Optional Stainless Steel Housing

Cutting-Edge Technology in Gas Detection

GDSFX Catalytic Fixed Gas Detectors are setting a new standard in industrial safety by offering superior sensitivity and reliability in the detection of flammable gases. The GDSFX Catalytic series of devices uses catalytic sensor technology to detect leaks of various flammable gases, such as methane, propane, and hydrogen. These sensors feature a catalyst surface where flammable gases react with oxygen, and they use the temperature difference generated by this reaction to quickly and accurately detect gases that pose a fire hazard.

Thanks to its LCD screen, it provides users with real-time gas readings, device status, and alarm information in a clear and easy-to-understand manner. The screen’s user-friendly interface allows for easy configuration of device settings and alarm limits. Modbus RS485 communication capabilities enable the detector to be integrated into control systems and monitored remotely, allowing facility staff to easily monitor multiple detectors from a central location.

GDSFX Catalytic Gas Detectors are designed to deliver high performance and durability in potentially explosive and hazardous industrial environments. The device increases operational efficiency and reduces maintenance costs by minimizing the need for calibration through its embedded software. These features are of vital importance, particularly in high-risk areas such as petrochemical plants, the paint industry, and flammable liquid and gas storage facilities.

  • A sensor usage algorithm that ensures a long sensor lifespan and reduces the frequency of calibration
  • Sensor lifespan of up to 3 years
  • High-resolution LCD screen for a clear display and easy reading
  • Modern gas level gauge displaying real-time readings
  • 3-color alarm status indicator LEDs (green, yellow, red)
  • Simple interface and easy configuration with 4 buttons
  • A safe and comfortable user experience with its magnetic pen
  • Seamless communication with all modern automation systems via RS485 Modbus, 4–20 mA analog, and contact relay outputs
  • A comprehensive kit including wall and pipe mounting hardware, a magnetic test pen, and explosion-proof fittings
Supply Voltage24 VDC ± 25%
Measurement Range0 – 100% LEL
Resolution1% of the detection range
Response Time< 10 seconds
Sensor TypeCatalytic Pelistor
Analog Output4–20 mA
Digital Outputs3-Contact Relay (NO or NC),
RS-485 Modbus
Working ConditionsTemperature: -20/+60°C
Pressure: 86–106 kPa
Humidity: 95% RH
Weight2.55 kg
BodyAluminum
(Optional Stainless Steel)
Sensor CapsuleStainless Steel
ATEX ClassII 2G Ex d IIC T6 Gb
IP Protection RatingIP65 (IP66 with optional accessory)
Warranty Period3 Years
Detected Gases
Order CodeGas NameFormula
GDSFXC43L0100Methyl ethyl ketoneC4H8O
GDSFXC38L0100PropyleneC3H6
GDSFXC37L0100StyreneC8H8
GDSFXC36L0100MethanolCH3OH
GDSFXC34L0100Ethyl acetateC4H8O2
GDSFXC33L0100EthanolC2H5OH
GDSFXC32L0100CyclopentaneC5H10
GDSFXC31L0100CyclohexaneC6H12
GDSFXC30L0100AcetoneC3H6O
GDSFXC29L0100Acetic AcidC2H4O2
GDSFXC28L0100AcetyleneC2H2
GDSFXC27L0100EthyleneC2H4
GDSFXC26L0100IsopropanolC3H8O
GDSFXC24L0100Iso-octaneC8H18
GDSFXC22L0100IsobutaneC4H10
GDSFXC21L0100n-PropanolC3H8O
GDSFXC20L0100n-OctaneC8H18
GDSFXC19L0100n-HeptaneC7H16
GDSFXC18L0100n-HexaneC6H12
GDSFXC17L0100n-ButaneC4H10
GDSFXC16L0100n-PentaneC5H12
GDSFXC07L0100XyleneC8H10
GDSFXC06L0100Petroleum vaporN/A
GDSFXC04L0100TolueneC7H8
GDSFXC03L0100HydrogenH2
GDSFXC02L0100PropaneC3H8
GDSFXC01L0100MethaneCH4

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