Overview
Sturdy, simple and unique design, based on the lead acetate tape sensor, provides linear, interference-free and reliable H2S and total sulfur concentration measurement outputs.
Principle
The DKS1100/1200 instrument measures H2S in natural gas or other process gases. It has dual 4-20mA current loop output interfaces, dual measurement alarms, and an additional question and fault alarm relay output. The external expandable magnetic drive buttons allow the operator to use the instrument without opening any covers. The DKS1100/1200 displays the H2S concentration (ppb, ppm, gram, %, mg/m3) automatically from the low calibration range to 5 times the low calibration range. Calibration can be performed through the operator interface for manual calibration, or through the automatic calibration interface by connecting the calibration tank for calibration; The DKS1100/1200 can be configured with a certain number of selectable sampling systems and other accessories for high-concentration H2S, total sulfur content, or H2S concentration in liquids measurement.
Sensor: Only when hydrogen sulfide reacts with lead acetate does the test paper strip turn brown, and the content of hydrogen sulfide is directly proportional to the color change on the lead acetate paper strip.
The detection formula is as follows: Pb(Ac)2+H2S=PbS+2HAc
Lead acetate tape is the most reliable sensor that is not interfered by other sulfides. This is why lead acetate is chosen when high-precision measurement is required. However, it achieves linear output and single-point calibration.
Longest-lasting tape: DKS1100/1200 provides the longest-lasting tape on the market currently. Advanced algorithms are used to ensure that the entire 300 feet of tape is used up. The instrument can use a 350-foot roller.
DKS1100/1200 Explosion-proof and Sampling System Dilution Pretreatment System
Features
Ø Alarm response time less than 20 seconds
Ø Interference-free lead-acid paper tape sensor
Ø Optional CO2 sensor and total sulfur analysis
Ø Accuracy: 1.5%, repeatability: 1%
Ø Range: 0~50 ppb or 0~100%
Ø The paper tape can be used for 60 to 90 days (the longest paper tape on the market)
Technical Parameters
Power | 12~24 VDC@≤3W or 100~240VAC，50/60 HZ |
EPC | Class 1,Div 2 Grps A,B,C,&D; CSA Certification |
Working Temperature | 0~50℃(standard), other ranges can be customized. |
Output Range | H2S：0~50ppb 0~100 ppm(standard)，concentration can be customized |
Response Time | 20s |
Accuracy | Full scale 1.5% (H2S), 3% (total sulfur or diluted) |
Input | 24-bit A/D sensor module based on microprocessor; Minor remaining paper tape alarm; Remote calibration, gas path switch, low pressure alarm |
Output | Double isolation 4-20mA (requires loop power supply) Modbus serial RS-232 & RS-485 (can be equipped with Ethernet) Four 5A single-pole double-throw alarm output relays (high, high, low paper, failure) Electromagnetic actuator (automatic calibration, total sulfur, gas path switch, drive valve) |
Display | 2x16 character liquid crystal display with backlight Operate the menu through the built-in buttons |
Configuration software (optional) | Analysis configuration software based on the WindowsTM platform; file retrieval, Modbus mapping |
Optional Equipment |
|
Total sulfur reactor | Total Sulfur Furnace - Converts all sulfides into H2S that can be analyzed for total sulfur (requires AC power) |
Gas circuit switch | allow to switch between two input gases, or to switch from H2S to total sulfur measurement. |
Automatic calibration | Allow initialization calibration based on time or external switches |
Dilution device | Up to 100% H2S can be measured with an osmotic membrane and a non-disturbing H2S carrier gas dilution |
Liquid sampler | Measure H2S from liquid hydrocarbons or water |
Customized system | Customize integrated systems according to different operating conditions |
Dashboard | The DKS1100 standard system is installed in a casing with dimensions of 13" wide x 15" high x 8" long, made of glass fiber; The non-standard system is installed on an instrument panel that is 24" wide x 32" high x 1/4" thick and has been surface oxidized. |
Measurement of CO2 | Dual-beam near-infrared detection, CO2 concentration displayed on the second line of the display, capable of 4-20mA output, measurement range from 0-2% to 0-20%. |
Applications
Ø Measurement of natural gas
Ø Petrochemical production
Ø Measurement of condensation
Ø Measurement of H2S in LPG
Ø Measurement of total sulfur concentration
Ø Measurement of CO2 concentration
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