硫化氫氣體檢測儀 4LT H2S
Hydrogen sulphide No.4LT
H2S
Performance |
MeasuringRange | 0.1 to 0.2 ppm | 0.2 to 2.0 ppm | 2.0 to 4.0 ppm |
Number of Pump Strokes | 2 | 1 | 1/2 |
CorrectionFactor | 1/2 | 1 | 2 |
SamplingTime | 1 minute per pumpstroke | ||
DetectingLimit | 0.05 ppm (n=2) | ||
ColorChange | Pale Yellow → ReddishBrown | ||
ReactionPrinciple | H2S + HgCl2 → HSHgCl + HCl | ||
Coefficient ofVariation | 10% (for 0.2 to 0.5ppm), 5% (for 0.5 to 2 ppm) | ||
ShelfLife | 2Years | ||
Correctionsfor temperature & humidity | Temperature correction is necessary | ||
Store the tubes inthe refrigerator to keep at 10oC (50oF) orbelow. |
Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color by itself |
Ammonia | - | No effect | Nodiscoloration |
Sulfurdioxide | - | No effect | Nodiscoloration |
Nitrogendioxide | - | No effect | Nodiscoloration |
Mercaptans | 1/10 time | Plus error | Produce reddish browncolor |
Methylsulfide | - | No effect | Nodiscoloration |
Othersubstance measurable with this detector tube |
Calibration gasgeneration | Permeation tube method |
TLV-TWA | TLV-STEL | Explosive range |
10ppm | 15ppm | 4.0to 44% |