Gastec รหัสสินค้า No.121SL หลอดวัดความเข้มข้นของแก๊ส,Gas Detector Tube for BenZene,Meas.range:1～100ppm,(10pcs/Box)

Benzene Detection Tubes (1 to 100 ppm)Gastec Detection Tube No. 121S measures Benzene With a Range of 1 to 100 ppm.

• Measuring Range:
  • 1 to 20 ppm - 5 pump strokes
    Correction factor: 1
  • 20 to 100 ppm - 1 pump stroke
    Correction factor: 5
• Sampling Time: 2 minutes per pump stroke
• Detecting Limit: 0.25 ppm (5 pump strokes)
• Color Change: White to Dark green
• Corrections for temperature & humidity: Unnecessary
• Relative Standard Deviation: 20% (for 1 o 5 ppm), 15% (for 5 to 20 ppm)
• Reaction Principe: C6H6 + I2O5 + H2S2O7 → I2
• 3 Year Shelf Life
• Store the tubes at cool and dark place
• Comes in a box of 5 detector tubes and 5 pre 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