Gastec รหัสสินค้าNo.159หลอดวัดความเข้มข้นของแก๊ส,Detector Tubes For Tetrahydrofuran,Meas.range:20～800ppm,Quantity:5pcs/Box

Tetrahydrofuran Detection Tubes (20 to 800 ppm)Gastec Detection Tube No. 159 measures Tetrahydrofuran with a Range of 20-800 ppm.

• Measuring Range:
  • 20 to 50 ppm
  • 50 to 800 ppm
• Number of Pump Strokes: 2, 1
• Correction Factor: 0.4, 1
• Sampling Time: 3 minutes per pump stroke
• Detecting Limit: 2 ppm (2 pump strokes)
• Changes from Pale vermilion to Pale blue
• Corrections for temperature & humidity: Temperature correction is necessary
• 3 Year Shelf
• Reaction Principle: C4H8O + Cr6+ + H2SO4 → Cr3+
• Relative Standard Deviation: 15% (for 50 to 200 ppm), 10% (for 200 to 800 ppm)
• Store the tubes at cool and dark place.

• 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