Karf&Scoot GDSFX Electrochemical Sensor Gas Detector

It is used to accurately detect toxic gases and oxygen. It can detect gases such as carbon monoxide, hydrogen sulfide, ammonia, and sulfur dioxide with precision at the ppm (parts per million) level. Thanks to its relay outputs, 4–20 mA analog signal output, and RS-485 Modbus signal output, it integrates easily into your safety system.

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 Electrochemical Fixed Gas Detectors offer a next-generation solution for detecting toxic and asphyxiating gases. They use electrochemical sensor technology to detect toxic gases such as carbon monoxide, hydrogen sulfide, and ammonia. These sensors utilize the electrochemical reaction of target gas molecules on an electrode to provide highly accurate and specific detection.

With its color LCD screen, it provides real-time information on gas levels, device status, and alarms. The screen’s user-friendly interface allows for easy configuration and operation of the device. 4–20 mA analog and Modbus RS485 communication capabilities enable easy integration of the detector into control systems and facilitate centralized monitoring.

GDSFX Electrochemical Gas Detectors can detect even low gas concentrations thanks to their highly sensitive sensor. This high sensitivity and reliability are critical in sensitive applications such as wastewater treatment plants, laboratories, and chemical plants, as well as in the energy and food industries. The device’s long-lasting design, combined with minimal maintenance requirements, increases operational efficiency and reduces downtime.

  • 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 connectors
Supply Voltage24 VDC ± 25%
Measurement RangePlease check the gas list
Resolution1% of the detection range
Response TimePlease check the gas list
Sensor TypeElectrochemical
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 NameFormulaMeasurement RangeResponse Time
GDSFXE09P1000Carbon MonoxideCO1,000 ppmT90 < 30 s
GDSFXE13P0030Hydrogen SulfideH2S0–30 ppmT90 < 30 s
GDSFXE13P0100Hydrogen SulfideH2S0–100 ppmT90 < 30 s
GDSFXE13P2000Hydrogen SulfideH2S0 – 2,000 ppmT90 < 40 s
GDSFXE48P0010FormaldehydeCH2O0–10 ppmT90 < 120 s
GDSFXE14P0030Nitrogen Dioxide
(Nitrogen Dioxide)
NO20–30 ppmT90 < 30 s
GDSFXE12P0100AmmoniaNH30–100 ppmT90 < 75 s
GDSFXE12P05000AmmoniaNH30–500 ppmT90 < 75 s
GDSFXE12P1000AmmoniaNH30–1,000 ppmT90 < 75 s
GDSFXE12P5000AmmoniaNH30–5,000 ppmT90 < 120 s
GDSFXE10P0010ChlorineCL20–10 ppmT90 < 40 s
GDSFXE44P0250Nitric oxide
(Nitrous oxide)
NO0–250 ppmT90 < 15 s
GDSFXE11P0020Sulfur DioxideSO20–20 ppmT90 < 30 s
GDSFXE15V0025OxygenO20–25 % by volumeT90 < 10 s
GDSFXE49P0020Ethylene OxideC2H4O0–20 ppmT90 ≤ 120 s

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