When Safety Counts!
Gas Detection & Warning Systems
Bieler+Lang manufactures and distributes gas warning devices & gas detection systems for more then 50 years, all-around the globe. Because safety counts.
Bieler+Lang is your competent partner
for safety technology and work safety.
In many areas, the occurrence of harmful or explosive gases and vapors is to be expected.
We help you to protect people, the environment, technical equipment and property from serious damage. For over 50 years, our products have been providing timely and reliable warning of gas accidents and explosions.
Therefore, trust in Bieler+Lang!
Products
Gas detection & warning systems
Explosive & flammable gases
Toxic gases, CO² 
Refrigerant
Mobility & Parking
Biogas
Building servicesServices
Everything from one source
Project planning
Everything from one source
We take care of everything for you, from project planning to installation of your new gas detection system. Sales and service are there to provide you with expert support.
Engineering
Individual gas detection systems
From small enclosures to floor-standing cabinets, we custom-manufacture your individual gas detection system.
Maintenance & Repair
Provision for your investment
Conclude a specific maintenance contract with us.
This way, you can be sure that your gas detection system will have the desired high availability.
Service
Safety must be maintained
Service
Maintenance &
Maintenance contracts
Current Trade Fairs
Bieler+Lang on the road for you. Save the dates!
HYDROGEN Technology EXPO Europe – October 2025. Hamburg, Germany.
Together with other smg group member, we will once again be in Hamburg from October 21-23, 2025.
Safety is our top priority! Bieler+Lang will be on site with a broad portfolio of gas detection systems.
From simple single-point monitoring in hazardous areas to complex digital industrial-scale systems—Bieler+Lang is your expert in gas detection technology. This ensures occupational safety, protection of your investments and hydrogen facilities, as well as our environment!
We look forward to seeing you in Hamburg!