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Toxic and Oxygen Gas Detectors

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RC Systems offers a wide range of toxic and oxygen gas detectors. Each SenSmart toxic and oxygen gas detector model is designed to deliver optimum price, performance and versatility to fit any situation. Field swappable smart electrochemical sensors are available for Oxygen (O2), Hydrogen Sulfide (H2S), Sulfur Dioxide (SO2), Ammonia (NH3), Chlorine (Cl2), Hydrogen Fluoride (HF) and many other toxic gases. SenSmart gas detectors offer Important features including heated sensors (SenSmart 3100 & 6100), Ethernet / Web Server (SenSmart 6100) and wireless communications with the easy to install SenSmart 7100.  For lowest price points consider the SenSmart 1100 and 2100 4-20mA loop powered gas detectors.


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  • 2.4GHZ/900MHZ wireless with integral battery
  • Local calibration and real time event log
  • 15’ remote sensor option
  • Backlight Available
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  • QVGA LCD with stunning color graphics
  • Ethernet: Modbus TCP with web server
  • Dual Port Modbus RTU/relays option 
  • RS-485 remote sensor option up to 4000’
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  • Color backlit LCD Display
  • Display Color Changes with Alarm Status
  • Generation 2 Smart Sensor Compatible for increased signal stability
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  • 2-Wire 4-20mA (sink) with local  LCD graphic display
  • Gen 2 Smart Sensor
  • Local calibration and real time event log
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  • 3-Wire 4-20mA (source) with local backlit LCD graphic display
  • Local Calibration and real time event log
  • Single Port Modbus RTU/relays option 
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  • 2-Wire 4-20mA (sink) with local  LCD graphic display
  • Local calibration and real time event log
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  • Low Cost
  • 2-wire 4-20mA (sink)
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Hydrogen Sulfide (H2S)

H2S is a colorless toxic gas which can cause adverse effects on the human body as low as 2ppm, and can be fatal at levels as low as 100ppm with prolonged exposure. H2S is naturally occuring during the chemical breakdown of organic compounds in the absence of Oxygen. Typical areas where H2S sensing, detection and monitoring are a concern include: oil refineries, wastewater facilities, oil and gas wells, tanks and compressor stations.