Gastec รหัสสินค้า No.121S หลอดวัดความเข้มข้นของแก๊ส,Gas Detector Tube for BenZene,Meas.range:2～312ppm,(10pcs/Box)

Benzene Detection Tubes (2 to 312 ppm)Gastec Detection Tube No. 121S measures Benzene With a Range of 2-312 ppm.

• Measuring Range:
  • 2 to 5 ppm - 4 pump strokes
    Correction factor: 0.4
  • 5 to 120 ppm - 2 pump strokes
    Correction factor: 1
  • 120 to 312 - 1 pump stroke
    Correction factor: 2.6
• Sampling Time: 2 minutes per pump stroke
• Detecting Limit: 0.5 ppm (4 pump strokes)
• Changes from White to Dark Green
• Corrections for temperature & humidity: Unnecessary
• Relative Standard Deviation: 20% (for 5 to 40 ppm), 15% (for 40 to 120 ppm)
• 3 Year Shelf Life
• Reaction Principle: C6H6 + I2O5 + H2S2O7 → I2
• Store the tubes at a cool and dark place.
• Comes in a Box of 5 pretubes and 5 detector tubes

• On-site measurements can be performed easily by anybody, anytime and anywhere, in a short time
• Easy-to-check direct reading possible due to calibrated scale directly printed on the tube
• An extensive measuring range can be obtained by adjusting the sampling volume
• In order to assure high precision, each production lot is tested and calibrated independently, Each detector tube has its own quality control number printed on the tube
• Long shelf-life with excellent long-term stability