
Development and manufacture of tank caps, level indicators, sensor technology and wiring harnesses for the automotive and leisure industry.

Gaslock GmbH
IserlohnNew on Amplifa
About Gaslock
Gaslock GmbH, headquartered in Iserlohn, develops and manufactures tank caps with self-locking closure mechanisms and valve systems, level indicators, fuel and accessory parts for the automotive, motorcycle and leisure industries. Since 1998 the company has supplied Harley-Davidson with self-locking tank caps that require a high degree of mechanical precision. In 2010, GASLEVEL®, an ultrasonic-based level indicator for gas cylinders used by campers, boat owners and caterers, was introduced. Production includes thermoplastic plastics processing (ABS, silicone) in small and medium series, SMD circuit board assembly with modern pick-and-place machines, and fully automated wiring harness manufacturing including cable cutting, double crimping, tinning and housing assembly. In addition to ABS and silicone, materials include billet aluminium and stainless steel for tank caps. In 2021, an IoT/LoRa division was established. The company employs 22 people at the Iserlohn site.
- Site
- Iserlohn
- Processes
- Thermoplastic processing, SMD assembly / circuit board assembly (pick-and-place), Wiring harness manufacturing – fully automatic cable cutting, Semi-automatic and fully automatic double crimping, Tinning of cable ends, Assembly of housings, Development of cable sets (planning, sampling through to series release), Manufacture of tank caps with closure mechanisms and valve systems (mechanical precision)
- Materials
- ABS plastic, Silicone, Aluminium (billet), Stainless steel, Neodymium magnet, Copper (cable ends, tinned), Copper
- Certificates
- EX certificate (ATEX, II 3 G Ex nA/ic IIA T3 Gc), EX certificate (ATEX)
- Employees
- 22
- Industries
- Automotive industry, Motorcycle industry, Caravan/Camping/Leisure, Marine (boats), Gastronomy/Catering, IoT
- 01
Design/Development
- 02
SMD circuit board assembly (pick-and-place)
- 03
Wiring harness manufacturing
- 04
Thermoplastic processing
- 05
Housing assembly
- 06
Cable routing and wrapping
- 07
Quality inspection
- 08
Shipping
Materials & Processes
ABS plastic
Housing material for level indicators such as GASLEVEL® Classic, produced by thermoplastic processing.
Silicone
Heat-resistant material for the magnetic silicone folding funnel.
Aluminium (billet)
Material for tank caps with high mechanical precision requirements.
Stainless steel
Used for screens in billet aluminium tank caps.
Neodymium magnet
Integrated magnets in level sensors and funnels for attachment to metal surfaces.
Copper
Cable ends are tinned during wiring harness manufacturing.
Sites

Iserlohn
DEProduction site
- Lot size
- Small and medium series
- Materials
- ABS, silicone, aluminium, stainless steel, copper
- Pick-and-place assembly machines (SMD)
- Fully automatic cable cutting machine
- Crimping system (semi-/fully automatic, double crimping)
Components & Products





Inside the production






Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Thermoplastic processingPlastics | – | – | – | small and medium series | ABS plastic |
| SMD assembly / circuit board assembly (pick-and-place)Assembly | – | – | – | – | Circuit boards, electronic components |
| Wiring harness manufacturing – fully automatic cable cuttingJoining | – | – | – | – | Cables, wires |
| Semi-automatic and fully automatic double crimpingJoining | – | – | – | – | Cables, crimp contacts |
| Tinning of cable endsSurface treatment | – | – | – | – | Copper (cable ends) |
| Assembly of housingsAssembly | – | – | – | – | Plastic |
| Joining | – | – | – | – | Insulating tubing, heat-shrink tubing, corrugated conduit |
| Development of cable sets (planning, sampling through to series release)Engineering | – | – | – | – | Cables |
| Manufacture of tank caps with closure mechanisms and valve systems (mechanical precision)Machining | – | – | – | small and medium series | Aluminium, stainless steel |
| Development and production of level indicators/sensor technology (ultrasonic)Engineering | – | – | – | – | ABS plastic, neodymium magnets |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Pick-and-place assembly machines (SMD) | – | – | – | – | Iserlohn |
| Fully automatic cable cutting machine | – | – | – | – | Iserlohn |
| Crimping system (semi-automatic and fully automatic, double crimping) | – | – | – | – | Iserlohn |
Additional services
Reference customers
Quality
Gaslock manufactures under ATEX Ex certification (II 3 G Ex nA/ic IIA T3 Gc) for use in potentially explosive atmospheres. Production takes place entirely at the Iserlohn site with modern equipment and qualified staff.
| Evidence | Iserlohn |
|---|---|
| EX certificate (ATEX) |
History
- 1998
Start of supplying Harley-Davidson with self-locking tank caps.
- 2010
Market launch of GASLEVEL® – level indicator for the leisure market.
- 2021
Establishment of the IoT/LoRa division (Internet of Things).
- 2024/2025
Product launch of the radiator cap (SAE J164) and the magnetic silicone folding funnel.