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Honeywell 705 Combustible and Toxic Sensor

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Manufacturer: Honeywell Analytics

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The sensor is electrocatalytic, and consists of two beads of refractory oxide formed on a fine platinum wire coil. The active bead is coated with a catalyst material whilst the reference bead is glass coated. In the presence of gas the catalyst coated bead promotes the oxidation of the gas, causing it to heat up and so increase in electrical resistance. This change of resistance relative to the reference bead can be measured, and is in direct proportion to the concentration of combustible gas. The signal is converted to an analogue output for direct display on a companion control card as percent LEL (Lower Explosive Limit).
 

Features Include:

  • Fast response
  • High resistance to catalytic poisoning
  • Low cost, high performance design
  • Low power consumption
  • Accurate, trouble free gas detection
  • Corrosion resistant aluminum construction
  • Five year warranty

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