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Gas Detectors

Gas Detector - ExDetector SC-220

Bieler + Lang GmbH

  • Detects combustible gases and vapours
  • Includes integral switched outputs for alarm 1, alarm 2, and detector fault
  • Suitable for Zone 2 explosion hazard areas
  • Includes optional manual control unit Calibrationbox-i for calibration
  • Complies with safety standards EN 50270, EN 61000-6-3, and EN 60079-15

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Description Vendor

The ExDetector SC-220 is a gas detection and warning system designed for use in hazardous areas. It detects combustible gases and vapours, measures gas concentration, and provides warning signals. It features a semiconductor gas sensor, a linear measurement signal (4-20 mA), and integral switched outputs for alarms and error signals. It is suitable for Zone 2 explosion hazard areas and can be programmed for standalone operation or as a transmitter CL for integration with alarm controllers. The system operates by using a semiconductor sensor with an integral heating coil, which ensures a constant operating temperature. Combustible gases reach the sensor surface by diffusion and influence its electrical conductivity, which is then converted into a 4-20 mA measurement signal. The device is available in different sensor variants (Type M, P, S) for detecting specific gases and can be calibrated using an optional manual control unit. It is designed for wall-mounting and offers a range of technical specifications, including a response time of typically less than 30 seconds, a temperature range of -20°C to +55°C, and a humidity range of 20% to 90% relative humidity.

Use Cases

  • Monitoring gas concentration in hazardous areas
  • Triggering protective measures in case of gas presence
  • Suitable for areas with Zone 2 explosion hazard

Capabilities

  • Measurement of gas concentration
  • Alarm stages with pre-alarm and main alarm
  • Integral switched outputs for alarms and error signals
Bieler + Lang GmbH Bieler + Lang GmbH is a German gas detection systems manufacturer, based in Achern, with over 50 years of experience specifically in hydrogen leak detection technology. The company's ExDetector HC 100 and HC 150 sensors use catalytic combustion (pellistor) technology to detect hydrogen leaks as a percentage of the lower explosion limit (%LEL), since hydrogen's odorless, colorless nature and inability to be detected by infrared sensors make specialized detection essential; its addressable and aspirating detectors serve safe areas, ATEX/IECEx explosive zones, and hard-to-access spaces like clean rooms. Bieler + Lang's ExDetector X5 combines up to two sensor heads with contactless one-man calibration and supports detection of over 400 gases, while the GMC 8034 evaluation unit serves as a compact control center for gas detection systems. All devices are developed, manufactured, and calibrated in-house under strict quality standards for industrial, research, and energy technology applications.
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