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Analog 4-20 mA Gas Sensor Modules - 4101 Series

Combustible gas, oxygen deficiency and toxic gases are detected by this series of 4-20 mA gas sensor. Featuring complete diagnostic features and 4-20 mA output, the 4101 Series uses catalytic bead sensor for combustible gas, infrared for methane detection, and electrochemical sensors for oxygen and toxic gas detection.
Gas detectors

The Sierra Monitor Model 4101 Series provides the user with the features needed in a stand-alone, fixed-point hazardous gas monitor system.  Utilizing catalytic bead sensor for combustible gas, infrared sensor for methane, and electrochemical sensor technology for oxygen and toxic gas sensors, the Model 4101 provides accurate monitoring of hazardous gas conditions. Proven sensor design matched with reliable state-of-the-art electronics results in the ideal complete single channel package to protect your plant and personnel.

Key features include automatic low sensitivity check, false alarm avoidance, convenient diagnostic measurements, simple zero/span adjustments and flexible alarm and logging options.

How the Gas Sensors work

SMC Gas Monitoring

Gases that can be monitored by Sierra Monitor sensors:

  • Combustible Gas (Catalytic Bead)
  • Combustible Gas (IR %LEL/%by vol)
  • Oxygen (percent)
  • Ammonia
  • Carbon Monoxide
  • Chlorine
  • Ethylene Oxide
  • Hydrogen Chloride
  • Hydrogen Cyanide
  • Hydrogen Fluoride
  • Hydrogen Sulfide
  • Nitric Oxide
  • Nitrogen Dioxide
  • Sulfur Dioxide