H2S Data Logger
Data Logger for Sewer Monitoring
The GHS-8AT-EX by Gastec is a hydrogen sulphide data logger purpose built for continuous monitoring in sewer systems and other environments prone to H2S generation. Corrosive hydrogen sulphide can cause significant damage to sewer infrastructure, generate offensive odours and damage surrounding buildings and facilities over time. The GHS-8AT-EX provides ongoing monitoring of H2S concentration, helping operators track corrosion risk and identify the source of odour problems before they escalate.
KEY BENEFITS
- Large display screen shows concentration, temperature and remaining battery capacity
- Notifies the user when the sensor needs calibration
- Recording switch allows free selection of start and end points for data logging
- Small and lightweight design
- Outer case easily removed for replacement
+ more in the Description tab below
Continuous H2S Monitoring for Sewer and Wastewater Environments
Hydrogen sulphide is a persistent problem in sewer systems and wastewater infrastructure. When corrosive H2S gas accumulates, it causes rust and structural deterioration within the sewer itself, generates offensive odours that escape to the surface, and in severe cases causes significant damage to nearby buildings and facilities. The GHS-8AT-EX was developed specifically to address this challenge, providing continuous, reliable H2S monitoring to help operators stay ahead of corrosion and odour issues before they become major problems.
Built for Long-Term Unattended Deployment
The GHS-8AT-EX is designed to be deployed in sewer environments for extended periods, recording concentration and temperature data continuously. Even at a 1-minute logging interval, the instrument can store up to one month of data. Two AA batteries provide approximately 90 days of continuous operation under normal conditions, making it well suited to long-term unattended monitoring programs.
Interchangeable Sensors for Different Applications
Gastec offers five different hydrogen sulphide sensor modules for the GHS-8AT-EX, with measuring ranges from 0 to 10 ppm through to 0 to 3000 ppm. The sensors are interchangeable, allowing the same data logger to be configured for a wide range of measurement applications depending on the expected concentration at the monitoring location.
Built to Survive Harsh Sewer Conditions
With an enhanced IP66/67 rating for water and corrosion resistance, the GHS-8AT-EX is built specifically to handle the demanding conditions found inside sewer systems. The unit is designed to float on water, an important consideration given the environments it is typically deployed in. The outer case can be easily removed for sensor replacement or maintenance, keeping ongoing servicing straightforward.
Simple Data Retrieval and Analysis
Once a monitoring period is complete, the GHS-8AT-EX connects to a PC via USB cable to download logged data. Using Gastec’s dedicated ANASYS software, this data can be displayed graphically or exported as a text file for further analysis, supporting investigations into odour sources, corrosion patterns and overall sewer system performance.
Benefits
- Large display screen shows concentration, temperature and remaining battery capacity
- Notifies the user when the sensor needs calibration
- Recording switch allows free selection of start and end points for data logging
- Small and lightweight design
- Outer case easily removed for replacement
- Enhanced water and corrosion resistance, IP66/67 rated, designed to float on water
- Up to one month of concentration and temperature data can be recorded, even at 1-minute logging intervals
- Interchangeable sensor modules available across five different measurement ranges to suit different applications
Application
Hydrogen sulphide monitoring
Sensor type
Controlled potential electrolysis sensor
Sampling method
Diffusion
Sensor accuracy
±5% of full scale
Temperature measuring range
0°C to 40°C
Temperature sensor
CMOS temperature sensor
Temperature accuracy
±3°C
Display
LCD, shows concentration, temperature, time, battery life, remaining data capacity in days
Log type
Selectable from instant, average, peak, minimum
Operating temperature
0°C to 40°C
Operating humidity
30 to 95% RH, non-condensing
Power supply
2 x AA batteries, approx. 90 days continuous operation
Data capacity
Up to 1 month at 1-minute logging intervals
IP rating
IP66/67
Data download
USB connection to PC, ANASYS software for graphical display or text file export
Hydrogen Sulphide
H2S
- Chemical Manufacturing
- Confined Space & Compliance
- Energy (Oil & Gas)
- Landfill & Remediation
- Mining & Minerals
- Water & Wastewater
The GHS-8AT-EX is a hydrogen sulphide data logger designed for continuous monitoring in sewer systems and wastewater infrastructure, helping operators track corrosion risk and identify sources of offensive odour.
The instrument can store up to one month of concentration and temperature data, even at a 1-minute logging interval. Two AA batteries provide approximately 90 days of continuous operation.
Yes. Gastec offers five interchangeable hydrogen sulphide sensor modules covering ranges from 0 to 10 ppm through to 0 to 3000 ppm, allowing the instrument to be configured for different applications.
The unit carries an IP66/67 rating for enhanced water and corrosion resistance and is designed to float on water, making it suitable for deployment inside sewer systems.
Data is downloaded by connecting the GHS-8AT-EX to a PC via USB cable. Gastec's dedicated ANASYS software allows the data to be displayed graphically or exported as a text file.
Calibration requires a dedicated CK-11 series hydrogen sulphide gas generation kit matched to the sensor type installed in the unit.
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