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Gas detection

Hydrogen Sulfide (H2S) Detection

Choose an H2S gas detector around the monitoring task, required measuring range and sampling conditions. Review Eranntex model options for portable, transportable, fixed and online monitoring equipment, then confirm the sensor configuration and project requirements before requesting a quotation.

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Gas identity

Chemical name
Hydrogen Sulfide
Formula
H2S

Why H2S Is Monitored

In the United States occupational context, the CDC/NIOSH Pocket Guide identifies hydrogen sulfide as a workplace chemical hazard. Monitoring helps organizations evaluate H2S conditions against their site procedures and applicable requirements. This page does not prescribe exposure limits, alarm settings or entry criteria; those requirements must be established for the relevant jurisdiction and task.

Four Questions for H2S Detector Selection

Monitoring task
Will the detector be worn by a person, carried between measurement points, or installed at a fixed location? Describe the work activity and where measurements are needed before comparing product types.
Unit and range
What H2S unit and measuring range does the project require? Include the expected concentration and required resolution. Compare each model's own options; a listed range does not establish suitability for a task or define exposure limits or alarm settings.
Gas configuration
Is H2S the only target, or must other gases be monitored at the same time? List each gas and range, and confirm the simultaneous channel configuration for the selected model.
Sampling conditions
Will gas reach the sensor by diffusion, or must a pump draw a sample from another location? Specify the sampling point, tubing and accessories, temperature, humidity and any condensation. Confirm the complete sampling arrangement for the intended conditions.

How to Read the H2S Model Options

Compare options within the required measurement unit, then use the product links to review each model's specifications and available documents. The ranges, resolutions and sampling arrangements belong to the individual model shown; they are not a combined specification for one detector.

Each listed gas-and-range option describes a documented capability for that model. It does not identify an installed gas combination or a confirmed orderable configuration. Confirm the required gases, ranges and sampling arrangement for your project.

For BTYQ-MS104K-S1, confirm the sensing principle for the selected H2S range; the published model information does not assign a sensing principle to that option.

Documented H2S Product Options

Review model-specific documented ranges, resolutions and sampling methods before confirming a configuration.

ppm options

H2S documented product capabilities for ppm measurements
Product modelProduct categoryDocumented rangeResolutionSamplingProduct link
BTYQ-MS104K-LPortable Gas Detection
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
PumpView BTYQ-MS104K-L
BTYQ-MS104K-MPortable Gas Detection
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
Diffusion (standard) or Pump (standard)View BTYQ-MS104K-M
BTYQ-MS104K-S1Portable Gas Detection
  • 0–100
  • 0.01 ppm
DiffusionView BTYQ-MS104K-S1
BTYQ-MS104K-S2Portable Gas Detection
  • 0–10
  • 0–50
  • 0–100
  • 0–2,000
  • 0–10,000
  • 0.001 ppm
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
DiffusionView BTYQ-MS104K-S2
BTYQ-MS400-SPortable Gas Detection
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
Diffusion (standard) or Pump (standard)View BTYQ-MS400-S
BTYQ-MS600-SPortable Gas Detection
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.001 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 0.1 ppm
PumpView BTYQ-MS600-S
BTYQ-MS600-S1Portable Gas Detection
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.001 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 0.1 ppm
PumpView BTYQ-MS600-S1
BTYQ-MS600-S2Portable Gas Detection
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.001 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 0.1 ppm
PumpView BTYQ-MS600-S2
BTYQ-PTM600-STransportable Gas Detection Systems
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.001 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 0.1 ppm
PumpView BTYQ-PTM600-S
BTYQ-PTM600-S2Transportable Gas Detection Systems
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
DiffusionView BTYQ-PTM600-S2
GTYQ-MIC-500SFixed Gas Detection
  • 0–10
  • 0–50
  • 0–100
  • 0–200
  • 0–10,000
  • 0–20,000
  • 0–50,000
  • 0.001 ppm
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
  • 1 ppm
  • 1 ppm
DiffusionView GTYQ-MIC-500S
GTYQ-MIC-500S-CBFixed Gas Detection
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
DiffusionView GTYQ-MIC-500S-CB
GTYQ-MIC-600Fixed Gas Detection
  • 0–10
  • 0–50
  • 0–100
  • 0–2,000
  • 0–10,000
  • 0.001 ppm
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
DiffusionView GTYQ-MIC-600
GTYQ-MIC-600-CBFixed Gas Detection
  • 0–10
  • 0–100
  • 0–500
  • 0–2,000
  • 0.01 ppm
  • 0.01 ppm
  • 0.1 ppm
  • 1 ppm
DiffusionView GTYQ-MIC-600-CB

mg/m3 options

H2S documented product capabilities for mg/m3 measurements
Product modelProduct categoryDocumented rangeResolutionSamplingProduct link
TH-2000-OUGas Monitoring & Analysis Systems
  • 0–10
  • 0.01 mg/m3
DiffusionView TH-2000-OU

Each row describes documented Product capability. It does not represent a confirmed SKU, an installed detection channel, a standard stock configuration, or permission to combine H2S with any other supported gas.

Products for Further Evaluation

View all H2S detectors

Related Monitoring Tasks

Illustrative personal gas monitoring scene with an Eranntex BTYQ-MS104K-S2 detector worn on a technician's upper chest.Application

Personal Gas Monitoring

A personal gas monitor samples air close to the worker. Choosing one means matching the required gases, wearing position and daily checks to the work. Use this guide to compare sampling arrangements, recording needs and portable detectors, then prepare the equipment and documents your team will need.

Review the monitoring task
Field team using remote gas sampling equipment outside a vessel access openingApplication

Confined Space Entry

Define two separate monitoring tasks: remote atmospheric testing before entry and continued monitoring while people are inside. Select gases from the site hazard assessment, then confirm sampling points, the pump, probe and line arrangement, instrument response and the equipment details needed for the inquiry.

Review the monitoring task
Technician checking a process valve during a gas leak inspectionApplication

Leak Detection

Industrial gas leak detection helps teams identify selected gas hazards around equipment, pipework and work areas. Portable instruments support inspection and investigation, while fixed detectors provide continuous monitoring at selected points.

Review the monitoring task
Fixed gas detector monitoring an industrial process areaApplication

Area Monitoring

Fixed and online gas monitoring systems provide ongoing visibility at selected industrial locations or sample points. Detector placement, sample handling, signal integration and alarm response should work together as one monitoring approach.

Review the monitoring task

Relevant Operating Contexts

Safety engineer checking a portable gas detector at an oil and gas process facilityIndustry

Oil & Gas

Oil and gas projects span mobile worker protection, continuous release-point detection and conditioned process sampling. Define the target gases, operating conditions and site response before selecting portable, fixed or online equipment.

Explore operating context
Safety technician inspecting process equipment at a chemical facilityIndustry

Chemical Processing

Define the target gases, measuring ranges and installation conditions for your process. Review the selected model's documentation and applicable certificate scope before specifying a configuration.

Explore operating context
Illustrative wastewater inspection scene: a technician holds a portable gas detector and lowers a sampling probe through an open access hatch.Industry

Water & Wastewater

Collection wet wells, sludge handling, digester gas lines and chemical dosing rooms need different gas-monitoring specifications. Match the required gases and measuring ranges to each location and task, then choose portable, fixed or extractive equipment. Include sampling conditions, the complete sample path and the required alarm response in the specification.

Explore operating context

Related Solution

Wireless gas monitoring topology linking area detectors by LoRa or 433 MHz to a main unit and cloud platform over 4G or Wi-Fi
Solution

Wireless Area Gas Monitoring

Connect compatible portable and fixed detectors across temporary, remote or difficult-to-wire sites, coordinate field alarms and bring device status and monitoring data into a shared operational view.

View solution

Engineering Resources

ENGINEERING GUIDEHow to Define an Industrial Gas Leak Detection Project
Read guide

Technical References

Define the H2S detection requirement

Provide the required unit and range, monitoring task, sampling method, deployment type, operating environment, applicable standard or jurisdiction, and any other gases that must be monitored.

Review documented options or discuss the requirement.

Final product configuration, gas combinations and orderable details require technical confirmation.

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