Key Specifications/Special Features:

• STK 1000 (toxic gas detection):
  • Target gas: carbon monoxide
  • Typical detection ranges: 20 to 1,000ppm
  • Standard circuit conditions:
    Heater voltage: 5V DC (periodic))
    Circuit voltage: 5 +/- 0.2V DC
    Load resistance: variable

    Electrical characteristics:

    Heat resistance at room temperature: 32 degrees

    Heat current (103mA)

    Heater power consumption: 89mW (average)

    Sensor resistance: 3 to 30 in 100ppm

    Standard test gas: carbon monoxide

    Standard test conditions: 24 +/- 2C, 50 +/- 5%
• STK 2000 (combustible gas detection):
  • Target gas: methane
  • Typical detection ranges: 500 to 1,000ppm
  • Standard circuit conditions:
    Heater voltage: 5V +/- 0.2V DC/AC
    Circuit voltage: 5¾ 0.2V DC
    Load resistance: variable

    Electrical characteristics:

    Heat resistance at room temperature: 43¾ 4

    Heat current: 76mA

    Heater power consumption: 380mW

    Sensor resistance: 2 to 20 in 400ppm

    Standard test gas: methane

    Standard test conditions: 24¾, 2, 50¾, 5%
• STK 3000 (air quality control):
  • Target gas: air contaminants
  • Typical detection ranges: 2 to 10ppm
  • Standard circuit conditions:
    Heater voltage: 5V 0.2V DC/AC
    Circuit voltage: 5 0.2V DC
    Load resistance: variable

    Electrical characteristics:

    Heat resistance at room temperature: 59 5

    Heat current: 56mA

    Heater power consumption: 280mW

    Sensor resistance: 3 to 300 in air

    Standard test gas: air and hydrogen

    Standard test conditions: 24¾, 2, 50¾, 5%
• STK 4000 (cooking control):
  • Target gas: alcohol
  • Typical detection ranges: 10 to 1,000ppm
  • Standard circuit conditions:
    Heater voltage: 5V 0.2V DC/AC
    Circuit voltage: 5 0.2V DC
    Load resistance: variable

    Electrical characteristics:

    Heat resistance at room temperature: 59¾ 5

    Heat current: 56mA

    Heater power consumption: 280mW

    Sensor resistance: 3 to 300 in air

    Standard test gas: air and ethanol

    Standard test conditions: 24¾, 2, 50, 5%

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