Feature :
- On-site measurements can be performed easily by anybody, anytime and anywhere, in a short time
- Easy-to-check direct reading is possible due to the 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
Performance :
Measuring range |
25 to 50 ppm |
50 to 800 ppm |
800 to 1600 ppm |
Number of pump strokes |
2(200 ml) |
1(100 ml) |
1/2(50 ml) |
Correction factor |
1/2 |
1 |
2 |
Sampling time |
1.5 min |
45 sec |
30 sec |
Detecting limit: 5 ppm (2 pump strokes)
Colour change: White → Brown
Corrections for temperature & humidity: Unnecessary
Relative standard deviation: 5 %(for 50 to 800 ppm)
Shelf life : 3 years
Reaction principle :
H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
Possible coexisting substances and their interferences
Substance |
Concentration |
Interference |
Changes colour by
itself to |
Nitrogen dioxide |
≧
1/4 |
- |
No |
Calibration gas generation: Permeation tube method
Reference: https://inaparts.com/
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