Gastec รหัสสินค้า No.121SP หลอดวัดความเข้มข้นของแก๊ส,Detector Tube For Benzene,Meas.range:0.2～66ppm,(10pcs/Box)

Benzene Detection Tubes (0.2 to 66 ppm) Gastec Detection Tube No. 121SP measures Benzene with a Range of 0.2 to 66 ppm.

• Measuring Range:
  • 0.2 to 20 ppm - 3 pump strokes
    Correction factor: 1
  • 20 to 66 ppm - 1 pump stroke
    Correction factor: 3.3
• Sampling Time: 2 minutes per pump stroke
• Detecting Limit: 0.1 ppm (3 pump strokes)
• Color Change: White to Brown
• Corrections for temperature & humidity: Unnecessary
• Relative Standard Deviation: 10% (for 0.2 to 5ppm) , 5% (for 5 to 20 ppm)
• 2 Year Shelf Life
• Reaction Principle:
  • 2C6H6 + HCHO → C6H5 - CH2 - C6H5
  • C6H5 - CH2 - C6H5 + H2S2O7 → Reaction product
• Store the tubes at a 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