Buy a gas detector

Buying a gas detector: the right choice for multi-gas detection

When buying a gas detector for professional applications, it is all about reliability, ease of use and the right sensor combination. Whether you are looking for a compact personal four-gas detector or a comprehensive six-gas detector with pump, data logging and live online monitoring: at BaSystemen you will always find a suitable solution. Thanks to our wide range you can choose precisely on the basis of application, environment (such as ATEX) and the gases you need to measure. Below we help you on your way with an overview of the most popular options.

Personal four-gas detectors for everyday use

For everyday personal protection, compact 4-gas detectors are the standard. They usually measure oxygen (O₂), explosive gases (LEL), carbon monoxide (CO) and hydrogen sulphide (H₂S). These models are ideal for general safety applications in industry, construction and installation engineering.

Examples of personal gas detectors:

• WatchGas SST4 Micro – Ultra-light, accurate, with data logging and alarm functions.

• WatchGas SST4 Mini – Extremely rugged, easy to operate and attractively priced.

• Multi Gas Clip Simple / Simple Plus – No buttons or maintenance required, up to 36 months of use without charging.

• Riken Keiki GX-3R – The world's smallest four-gas detector with rugged ATEX certification.

• WatchGas PDM Duo – Measures two gases at the same time, highly suitable for working environments with specific risks.

• Riken Keiki GX-3R Pro – The little brother of the Riken Keiki GX-3R, but with expansion options for up to 5 gases, with a CO2 or SO2 sensor for example.

• WatchGas QGM CAT / IR – Budget-friendly four-gas detector with a catalytic or infrared sensor, suitable for ATEX zones.

Pumped four-gas detectors for inspections and confined spaces

Pumped models are essential for gas detection in hard-to-reach places or for the preliminary inspection of confined spaces. They actively draw in air and therefore offer a fast response.

Recommended models:

• WatchGas SST4 Pump – Combines budget-friendly, reliable WatchGas gas detection with a powerful internal pump.

• MultiGas Clip Pump – Rugged pump version of the reliable MultiGasClip line, known for its long battery life.

• QRAE 3 – Compact, with interchangeable sensors and wireless connectivity.

Five- and six-gas detectors with extensive analysis capabilities

These models are suitable for situations in which additional gases have to be measured, such as VOCs, NH₃, Cl₂, NO₂ or CO₂. They are often fitted with a PID sensor, IR technology or electrochemical modules.

Recommended models:

• Riken Keiki GX-6000 – Measures up to 6 gases at once, including a PID or IR sensor.

• Riken Keiki GX-9000 – Rugged, advanced monitor with a wide range of sensors.

• WatchGas POLI – Modular design, suitable for several sensor types.

• GMI PS500 – Versatile 5-gas detector with a choice of more than 20 sensors.

• MultiRAE Lite / MultiRAE 2 / MultiRAE Pro – For a wide range of gas detection needs, from basic to comprehensive with PID, Bluetooth and more.

Online gas detection with live connectivity: the Blackline Safety G7 series

For continuous monitoring and real-time alerts, the Blackline G7 series offers advanced, connected gas detectors. They are extremely well suited to lone worker protection and to environments where 24/7 monitoring is crucial.

Recommended models:

• Blackline G7c – Wireless 4-gas detector with GPS, live connection and cloud management.

• Blackline G7c Pump – For remote detection with a built-in pump and live communication.

• Ideal for: the process industry, chemicals, oil & gas, and all situations in which immediate alerting is essential.

Which gas detector should you buy? We will help you choose

Buying the right gas detector starts with a proper analysis of your working environment, the risks present and your measuring needs. Our specialists know the market and will quickly guide you to the right device, whether that is a simple model or a professional gas detection system with cloud support.

➝ Contact us for advice without obligation or for a demonstration of a specific gas detector. We are happy to think along with you.