Gastec Hydrogen Sulfide Detector Tubes, White to Brown

Gastec colorimetric detector tubes for measuring hydrogen sulfide in workplace air. Pick the range that matches the levels you expect, from trace checks in the low ppm up to 4,000 ppm.

• Measures hydrogen sulfide (H2S)
• Color change: white to brown
• TLV: 1 ppm
• Four measuring ranges to choose from
• Glass tube; break both ends before sampling
• Use with a Gastec hand pump; avoid touching broken glass or reagent with bare hands

Manufacturer item number: see the list below. Select an option to see the exact item number.

Available in 4 versions:

• 4LL: 0.25 - 120 ppm – 4LL
• 4L: 1 - 240 ppm – 4L
• 4HM: 25 - 1,600 ppm – 4HM
• 4H: 10 - 4,000 ppm – 4H