Gastec รหัสสินค้า No.31B หลอดวัดความเข้มข้นของแก๊ส,Detector Tube for Oxygen,Meas.range:3～24%ppm,Quantity:10pcs/Box

Oxygen (O2) Detection Tubes ( 3 to 24%)Gastec Detection Tube No. 31B measures Oxygen with a Range of 3 to 24 %.

• Measuring Range: 3 to 6 %, 6 to 24 %
• Number of Pump Strokes: 1, 1/2
• Correction Factor: 1/2, 1
• Sampling Time: 1 minute per pump stroke
• Detecting Limit: 2 % (1 pump stroke)
• Color Change: Black → White
• Corrections for temperature & humidity: Unnecessary
• Reaction Principle: O2 + 4TiCl3 + 6H2O → 4TiO2 + 12HCl
• Relative Standard Deviation: 5 % (for 6 to 24 %)
• 3 Year Shelf Life
• Store the tubes at cool and dark place.
• If more than 40% carbon dioxide is coexisted, the tube reading will be 1% higher than the true concentration. (At 21% oxygen concentration tube 31B indicates 22%.)

• 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