Gastec รหัสสินค้าNo.91หลอดวัดความเข้มข้นของแก๊ส,Detector Tube for Formaldehyde,Meas.range:2～100ppm,Quantity:5pcs/Box

Formaldehyde Detection Tubes (2 to 100 ppm)Formaldehyde with a Range of 2 to 100 ppm.

• Measuring Range:
  • 2 to 20 ppm
  • 20 to 50 ppm
  • 50 to 100 ppm
• Number of Pump Strokes: 2, 1, 1/2
• Correction Factor: 1, 2.5, 5
• Sampling Time: 45 seconds per pump stroke
• Detecting Limit: 0.5 ppm (2 pump strokes)
• Changes from White to Brown
• Reaction Principle: HCHO + C6H4(CH3)2 + H2S2O7 → Condensation Polymer
• Relative Standard Deviation: 15% (for 2 to 6 ppm), 10% (for 6 to 20 ppm)
• 3 Year Shelf Life
• Store the tubes at cool and dark place.
• Comes in a Box of 5 pre tubes 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