Hydrogen Sulfide Gas Analyzer: GPro 500
Tunable Diode Laser for H2S Measurement
The GPro 500 hydrogen sulfide (H2S) gas analyzer is a unique tunable diode laser spectrometer designed for direct measurement of H2S in gas streams. It uses a folded-path laser beam design for simple installation and accurate H2S measurement.
Top Performance in H2S Measurement
An H2S analyzer for challenging applications, the GPro 500 provides a reliable measurement in catalytic reformers and coke oven gas measurements.
Low Maintenance and Operating Costs
This H2S gas analyzer is designed to operate in situ without a maintenance-prone conditioning system, reducing the total cost of ownership.
The GPro 500 is an alignment-free TDL gas analyzer, meaning that the typical challenges of TDL installation and alignment are significantly reduced.
TDL H2S Gas Sensors Frequently Asked Questions
Why use a TDL sensor for measuring hydrogen sulfide?
TDLs have many advantages over other H2S measurement technologies. Firstly, they are installed in situ in the process pipe or vessel so are exposed directly to the gas and therefore measure immediately. Some other analyzers measure a sample of gas that has been extracted and conditioned, which takes time and increases risk. Secondly, TDLs are immune to the presence of other gases in the process and will only measure H2S. Thirdly, they are extremely reliable and require practically zero maintenance.
How can a H2S TDL reduce costs?
Unlike other gas measurement technologies, TDLs have a very low maintenance requirement. Once installed, they will run reliably for many months without needing any maintenance.
Are TDL H2S analyzers easy to install?
Sometimes. Once the insertion point has been selected it’s a matter of fitting one or two flanges and a temperature and pressure sensor. Most TDLs are of a cross-stack design, meaning that they’re comprised of two parts (laser source and receiver) that sit opposite each other in the pipe or vessel. The two units have to be very carefully aligned which can be problematic. The GPro 500 has both parts installed in the same unit. The laser source is reflected by a three-sided mirror and is directed back to the receiver. Therefore, no alignment is required. Watch our video on easy installation.
In which applications can TDLs be used?
TDLs have a wide range of applications, including process control in direct chlorination and oxy-chlorination; safety monitoring in VCM waste gas recovery; and combustion optimization in package boilers, thermal oxidizers, fired heaters, FCC units, etc. For more information check our Application eBooklet
|Gas Measured||Hydrogen sulfide|
|Lower Detection Limit||20 ppm-v|
|Accuracy||2% of reading or 20 ppm, whichever is greater|
|Linearity||Better than 1%|
|Drift||Negligible (<2% of measurement range between maintenance intervals)|
|Sampling rate||1 second|
|Response time (T90)||H₂S in N₂ 1% to 0% in <4 seconds|
|Repeatability||±0.25% of reading or 100 ppm-v H₂S (whichever is greater)|
|Process pressure range||0.8 bar - 3 bar (abs)/11.6 psi - 29 psi (abs)|
|Process temperature range||0-250 °C (23-482 °F); optional (for probe installation) 0-600 °C (0-1112 °F) with additional thermal barrier|
|Effective path length||50 mm - 10 m, depending on adaption|
Features and Benefits
|Meets Critical Application Needs|
This H2S gas analyzer is ideal for measurement and control applications such as H2S control in catalytic reformers and coke gas measurements. These tunable diode laser gas analyzers offer a precise, reliable, and fast measurement in critical applications.
|Immediate, In Situ Measurement|
The GPro 500 H2S gas analyzer is installed in situ, so you get a quick response without the need to extract and condition a sample. This offers a reliable and cost-effective alternative to technologies that require extraction and conditioning of gases.
|Designed for Challenging Installations|
The GPro 500 is configurable, enabling the hydrogen sulfide gas analyzer's measurement system to be paired with a variety of process adaptions to meet a wide range of installation requirements.
|Predictive Diagnostics Ensure Long Life|
This H2S gas analyzer uses Intelligent Sensor Management (ISM) technology to offer predictive diagnostics on analyzer condition, including informing you when cleaning of the optical path will be required.