Gastec รหัสสินค้าNo.91Lหลอดวัดความเข้มข้นของแก๊ส,Detector Tube for Benzaldehyde,Meas.range:4～92ppm,Quantity:10pcs/Box

Formaldehyde Detection Tubes (0.1 to 40 ppm) Measures Formaldehyde with a Range of 0.1 to 40 ppm.

• Measuring Range:
  • 0.1 to 5 ppm - 5 Pump Strokes  Correction Factor: 1
  • 5 to 40 ppm - 1 Pump Stroke Correction Factor: 8
• Sampling Time: 1.5 minutes per pump stroke
• Detecting Limit: 0.05 ppm (5 pump strokes)
• Changes from Yellow to Reddish Brown
• Corrections for temperature & humidity: Temperature correction is necessary
• Relative Standard Deviation: 10% (for 0.1 to 0.5 ppm), 5% (for 0.5 to 5 ppm)
• 3 Year Shelf Life
• Reaction Principle:
  • 3HCHO + (NH2OH)3H3PO4 → H3PO4
  • H3PO4 + Base → Phosphate
• 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

TUBE NAME	Formaldehyde
MEASURING RANGE	0.1-40.0ppm
NO. TESTS PER BOX	10
STORAGE	Store refrigerated at 10°C (50 F) or below.
TUBE NUMBER	91L