Gastec รหัสสินค้า No.4M หลอดวัดความเข้มข้นของแก๊ส,Detector tube for Hydrogen Sulphide H2S,meas.range:12.5～500ppm,Quantity:10pcs/Box

Hydrogen Sulfide (H2S) Detection Tubes (12.5 to 500 ppm) Gastec Detection Tube No. 4M measures Hydrogen Sulfide with a Range of 12.5 to 500 ppm.

• Measuring Range:
  • 12.5 to 25 ppm
  • 25 to 250 ppm
  • 250 to 500 ppm
• Number of Pump Strokes: 2, 1, 1/2
• Correction Factor: 1/2, 1, 2
• Sampling Time: 45 seconds per pump stroke
• Detecting Limit: 2.5 ppm (2 pump strokes)
• Changes from White to Brown
• Reaction Principle: H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
• Relative Standard Deviation: 5% (for 25 to 250 ppm)
• 3 Year Shelf Life
• 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