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SDS1200 Coulomb Sulfur Analyzer

22 samples loaded once, high test efficiency.

Widened crucible, stable temperature zone,high combustion efficiency .

Optimized and upgraded electrolytic cell, extended service life , stable test results for a long time.

Stable and reliable sampling mechanism, low noise.

Sundy Sundy

Product description

Working principles:

A sample combusts and decomposes in air current with catalyst, the sulfur in coal produces sulfide in the reaction, and among the products, the sulfur dioxide absorbed by potassium iodide (KI) solution . Titrate the iodine produced by electrolyzing potassium iodide, and calculate the total sulfur content in coal according to quantity of electricity consumed when electrolyzing.
The total sulfur content, St, ad, of the sample, expressed as a percentage by mass, is given by the equation below:
St, ad=m1/m×100
St, ad is total sulfur content in general analysis samples, expressed as a percentage by mass, %;
m1 is displayed in coulomb integrator, expressed in milligram, mg;
m is the mass of the sample, expressed in milligram, mg.



Accurate, precise and stable test result

1、Optimized system design, full sample combustion, full electrolysis of generated gases and thorough integration ensure accurate results.

2、The double-rod sample delivery mechanism greatly improves the stability of sample delivery;

3、With dilated and thickened electrode plates, electrolysis is more sufficient, integration is more complete, and the test is more accurate;

4、Wide-body crucible design, the sample is in full contact with the combustion-supporting gas, and the combustion is full and rapid.


High automation

1、Chain type automatic sample sending device allows the adding and replacing of samples during test, 22 samples can be loaded once, then all samples’ introducing, testing and discarding are automatic and completed continuously.

2、Two-stage air filter to ensure stable flow for a long time.


Humanization design with stable performance

1、With high quality furnace material, thermal insulation and life time is greatly improved.

2、Unique drying tube with high capacity efficiently reduces the desiccant replacement frequency.

3、Reliable gas pump adopted, longer lifetime and lower maintenance frequency can be obtained.

4、Gas leak check is convenient and fast.

5、The new electrolytic cell leakage and corrosion protection design prevents abnormal leakage from causing corrosion to the instrument;

6、Equipped with silencer, healthy and environmentally friendly.




Description SDS1200
Test Method Coulomb Titration
Sulfur Determination Range 0.01% – 40%
Standards ISO20336,GB/T 214-2007
Sulfur Resolution 0.001%
Analysis Time/sample 3 ~ 5min
Preheating Time ≤30min
Max. Quantity of sample 22
Sample Weight 10 – 110mg(50±5mg Recommended)
Furnace Temp 1150℃(coal), 900℃(oil) ,1190℃(cement)
Heating Elements Silicon Carbide
Temp. Control Precision ±1℃
Temperature Sensor Thermocouple
Power Requirement AC 220V(-15% ~ 10%)50/60Hz
Max. Power 3kW
Gas Requirement Air
Gas pressure 14 to 45psig (1 to 3 bar)
Sample Introduction and Discarding Automatic
Gas Flow Checking Gas stabilization and balance device, digital flow meter adopted. Gas flow monitored by software
Chemical Reagents KI、KBr、Glacial acetic
Humidity ≤85%
Ambient Temperature ≤40℃
Operational Control Windows®-based software on external PC
Operation Cost Lower cost Desiccant: allochroic silicagel
Dimensions 890*610*410mm
Weight 81kg
Advance Calculation Yes
Analysis Report Yes
Statistics Report Yes
System Monitor Yes

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