Bieler+Lang gas detection & warning systems + Bieler+Lang electronics production
Gas warning devices and PCBs from Bieler+Lang – quality and safety you can rely on!

Bieler+Lang – Everything from a single source
Bieler+Lang gas detection and warning systems and Bieler+Lang electronics production. An overview :
Bieler+Lang has been producing electronic components in-house in southern Germany for almost 60 years. Our gas detection products have been providing timely and reliable warnings of gas accidents and explosions for almost as long. Many well-known companies – from large corporations to small plant manufacturers – have often relied on our durable quality products developed and manufactured in Germany for decades. The most important milestones in our almost 60-year history can be found here – Our history.
Bieler+Lang GmbH is currently pursuing three main areas of business:
- Manufacture and sale of gas detection systems and gas detectors
- Service and maintenance of gas warning devices
- Electronics production – also as contract manufacturing
Bieler+Lang gas warning systems and gas detectors
Bieler+Lang gas detection and warning systems – your competent partner for safety technology and occupational safety.
In many areas of daily life, the occurrence of mostly invisible and odorless dangers is to be expected – dangerous gases! If such harmful or explosive gases and vapors remain undetected, the consequences are often serious or even fatal. – We help you to protect people, the environment, technical equipment and property from serious damage!
Bieler+Lang gas detection products are constantly being improved by our development engineers and are produced and calibrated in-house according to strict quality standards. Our devices are characterized by simple operation and high reliability, often resulting in an extremely long service life.
This website offers deep insights into the cosmos of Bieler+Lang gas detection and warning systems:
- Under Areas you will generally find the area of application for which a gas warning device is required.
- Gases lists a large number of toxic, explosive or flammable gases that frequently need to be detected. Here, too, we can only provide an overview of the most common gases, their most frequent applications and their most dangerous properties. However, our devices and gas detection systems can also detect many other gases and vapors and are always designed for the specific application of each customer. For all inquiries, please contact our expert sales department.
- Under the heading Products you will find some of our most important components for gas warning systems, sorted by:
- Controllers for gas warning systems
- Gas detectors | Gas detectors
- Accessories for gas warning devices
You can also find out more about our training courses at the Bieler+Lang Academy and our service for all aspects of gas warning devices.

Bieler+Lang Maintenance & service of gas warning devices
Regular maintenance means a permanently high level of safety and availability for your system and is essential.
All Bieler+Lang products are designed and produced according to the latest guidelines. A high quality standard guarantees a long service life for our products. Unlike the electronics, however, the sensors have a limited service life. Depending on the type, they must be serviced or replaced regularly. – But that’s not all: the detectors of the gas detection system must then be correctly adjusted and calibrated again in order to reliably detect the target gas in the desired measuring range.
Maintenance+ServiceWe can carry out maintenance for you in accordance with the prescribed intervals from BG RCI leaflets T023 (DGUV 213-057) and T021 (DGUV 213-056).
- Individual maintenance contracts: In addition to our standard maintenance contract, we also offer premium maintenance contracts. We are then available for you around the clock!
- In addition, your employees can learn about our training courses at the Bieler+Lang Academy to become a qualified person (gas warning device) in accordance with T023 and then carry out some recurring maintenance tasks themselves.

Bieler+Lang electronics production
The production of electronic components and parts, the assembly of circuit boards with all the associated steps and processes has always been the innovative and qualitative heart of Bieler+Lang.
Electronics manufacturingFrom the development to the final assembly of the product, but also the logistical planning of all associated processes – from purchasing to modern warehousing to the delivery of finished products or electronic components – at Bieler+Lang you will find all the associated services, experts and specialists under one roof!
Bieler+Lang GmbH is currently pursuing two directions in the field of electronics production:
- As part of the safe monitoring group the in-house Bieler+Lang production facility forms the innovative and qualitative backbone of gas detector manufacturing for the entire smg group. – Bieler+Lang is therefore the production hub of the entire Safe Monitoring Group!
- Our contract manufacturing is also the first port of call as a supplier for a number of hand-picked, long-standing customers with high demands in terms of quality, supply chain and punctuality.
Bieler+Lang summarized – this is what distinguishes our company and our team:
- Flexible and customer-oriented
- Competent advice, planning, installation and service
- Fast response time
- Robust + durable products
- Broad + solid product portfolio
- In-house plant engineering
- Very good system and project consulting
- great price-performance ratio
- a great deal of preliminary work on all customer projects – from technical advice to project planning support and our on-site visits – Bieler+Lang is very close to the customer
- customized solutions
- High level of expertise in all customer projects
- Complete process from a single source (device manufacture – installation – maintenance)
- Broad and individual training program (Bieler+Lang Academy)
- Committed employees who are “on fire” for their field of work
- our factory customer service – the dedicated and expert service team
- High level of certification for our products
- Long-term customer loyalty
- Established company for decades
Conclusion – Gas warning systems from Bieler+Lang: Regardless of whether you have a small or large system, our sales experts will analyze your safety requirements on site and advise you on the relevant regulations for your application. Our specialists will then develop a safety concept tailored to your needs. Our in-house plant engineering department implements the system according to your requirements. Our service technicians install your new safety technology and commission it. Our comprehensive service network will continue to support you, because only a regularly maintained system can meet the high requirements over many years. Bieler+Lang – Security you can rely on!
- own production
- Very high level of vertical integration (from PC assembly and product assembly to shipping and logistics – all from a single source)
- Long-term partnerships and customer relationships
- Flexibility in electronics production
- High stress resilience
- High quality level
- Classic SME under the umbrella of the safe monitoring group
- Prototype construction + small series production
- wealth of experience
- High level of certification (ISO 9001, ISO 14001, etc.)
Conclusion – Electronics production with Bieler+Lang: We offer high quality made in Germany. Short distances and a high level of vertical integration, flexibility and special features, such as our just-in-time delivery service to customers and partners in Germany, have made us a reliable supplier for decades.
