Gastec รหัสสินค้า No.91L หลอดวัดความเข้มข้นของแก๊ส,Detector Tube For Formaldehyde,Meas.range:0.1～40ppm,Quantity:10pcs/Box

Formaldehyde Detection Tubes (0.05 to 1.0 ppm)Gastec Detection Tube No. 91LL measures Formaldehyde with a Range of 0.05 to 1.0 ppm.

• Measuring Range: 0.05 to 1.0ppm
• Pump Strokes: 5 (500 ml)
• Correction Factor: 1
• Sampling Time: 1.5 minutes per pump stroke
• Detecting Limit: 0.03 ppm (5 pump strokes)
• Changes from Yellowish Brown to Pale Pink
• Reaction Principle:
  • 3HCHO + (NH2OH)3H3PO4 → H3PO4
  • H3PO4 + Base → Phosphate
• Relative Standard Deviation: 10% (for 0.05 to 0.3 ppm), 5% (for 0.3 to 1.0 ppm)
• 1 Year Shelf Life (in the refrigerator)
• Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.

• 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