SKU: GAS211 Categories: ,

GAS211 Sulphide Ions Gastec Soluble Ion Tubes 1 – 100ppm

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SKU: GAS211 Categories: ,


GAS211 Sulphide Ions Gastec Soluble Ion Detector Tubes

The Gastec Sulphide Ion in Solution Detector Tube No. 211 provides an accurate, cost- effective, quick and easy method for detecting sulphide ion levels in solution. Determining a more efficient manner of testing for this has become paramount, especially in the wastewater treatment industry.

With Gastec’s easy-to-use system, direct-reading tubes produce a quantitative colour-stain that quickly pinpoints problem areas in just 2 to 3 minutes. The calibration scale, printed directly on each tube, provides on-the-spot results that are easy to read. This system saves you time and money by avoiding lengthy laboratory turnaround time. The Gastec sulphide ion tube requires no colour comparison chart or laboratory equipment to determine results. Additionally, the colour- stain ends with a clearly defined line of demarcation to further eliminate confusion, increasing the accuracy of the results.

The only equipment required for testing sulphide ions is the Gastec No. 211 detector tube and a clean container, saving money and eliminating the hassle of transporting cumbersome equipment. The system is so easy-to-use technical training is not necessary to perform tests accurately.

The detector tubes are available in four different ranges for more specific measuring, with a total range of 0.5 to 1000 ppm. With Gastec’s sulphide ion tube, no mixing of chemicals is required, minimising potential errors.

To measure, simply immerse the detector tube in a sample of liquid (placed in a beaker or other container). Anyone can measure concentrations quickly, easily and accurately on site.

Measuring Range 1 to 100 ppm
Sampling Time 2 minutes
Detecting Limit 0.5 ppm
Colour Change White     to     Brown
Reaction Principle S2- + Pb (CH3COO)2           PbS
Coefficient of Variation 10% (for 1 to 10 ppm), 5% (for 10 to 100 ppm)
Shelf Life 3 Years
Corrections for
temperature & humidity
Store the tubes at cool and dark place.


Possible coexisting substances and their interferences
Substance Concentration Interference Change colour by itself
CO32- 500 ppm Plus error No discoloration
Cl 5000 ppm Plus error No discoloration
CrO42- 25 ppm Minus error Yellow discoloration
SO32- 300 ppm Minus error No discoloration
S2O32- 50 ppm Unclear demarcation No discoloration
Calibration gas generation Sodium Sulphide standard solution

Additional Information

Weight 0.1 kg
Multi Gas Tags

Gas Range



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