a zeroloop partner
a zeroloop partner
Locked When It Should Be. Open When It Counts.
Locked When It Should Be. Open When It Counts.
Automatic gravity locks for waste bins, by Franzen.
Automatic gravity locks for waste bins, by Franzen.
Franzen's patented automatic gravity lock keeps every bin secured against theft, dumping, animals and vandalism — then opens itself the moment the bin is tipped to empty. Europe's leading bin-locking system, and the security layer for Zeroloop's smart collection network.
Locked against unauthorised access — even if the bin tips over
Opens automatically when emptied at collection
Protects pay-by-weight billing from illegal dumping
Matter's patented bio-filter lid turns foul gases into fresh air — no maggots, no odour, no weekly emptying. The perfect hardware partner for Zeroloop's smart, on-demand food waste collection.
Bio-filter lid breaks down odours into CO₂ & water
Sealed against flies & maggots — no infestations
2-year, maintenance-free filter life
Franzen's patented automatic gravity lock keeps every bin secured against theft, dumping, animals and vandalism — then opens itself the moment the bin is tipped to empty. Europe's leading bin-locking system, and the security layer for Zeroloop's smart collection network.
Locked against unauthorised access — even if the bin tips over
Opens automatically when emptied at collection
Protects pay-by-weight billing from illegal dumping
the problem
the problem
When Anyone Can Open the Bin
When Anyone Can Open the Bin
Unsecured waste bins cost councils and businesses every day.
Illegal dumping
Outsiders fill your bin — you pay to empty it.
Billing fraud
Pay-by-weight invoices skewed by unauthorised access.
Animals & pests
Wildlife tips and raids open, unsecured bins.
Wind & vandalism
A storm gust or a kicked bin spills waste everywhere.
the solution
The Automatic Gravity Lock
Franzen's patented gravity lock does the thinking for you. The lid stays locked through everyday handling — and a built-in safety device keeps it shut even if the bin is knocked over. When the truck lifts and tips the bin, gravity releases the lock automatically; set the bin down and it re-locks on its own.
Stays locked — secured against access, animals, wind and vandalism.
Tips to empty — gravity opens the lock automatically during collection.
Re-locks itself — closes securely the moment the bin is upright again.
the range
the range
The Complete System
The Complete System
Biowaste Bins with Bio-Filter Lid
Built to DIN EN 840 from weather-resistant, UV-stable recycled plastic. Brown or green lids.
Manual Triangular
81 × 41 mm. Ideal for municipal bins. Chemical-resistant housing, metal triangular key.
Key & Manual Locks
Secure closing without auto-open — ideal for confidential document bins.
Automatic 7000 Series
Protection against unauthorised opening & unwanted filling, with automatic open/close.
Top-part options: triangular key · barrel key · rotary knob · custom solutions on request.
Top-part options: triangular key · barrel key · rotary knob · custom solutions on request.
the system
Built From Four Parts
Decades of engineering, refined into a system that fits standard waste containers — and can be tailored to yours.
Upper lid part — key, triangular, knob or custom
Lower lid part
Lock part
Dowel — fastens the lock part
Better Together
Franzen + Zeroloop
Franzen secures the bin; Zeroloop makes it smart. Real-time fill sensors, GPS tracking and AI-routed pickups tell you exactly when each bin is ready — Franzen's gravity lock makes sure only the right waste is inside, and opens automatically when the truck arrives.
Franzen security
Locked bins, accurate contents, automatic opening at collection.
Zeroloop intelligence
Knows exactly when each secured bin is ready to collect.
Accurate data, secure bins, automated collection.
Accurate data, secure bins, automated collection.
At a Glance
At a Glance
Why Councils Choose Franzen
Stops illegal dumping — only keyholders can open the bin
Protects weight-based billing integrity
Automatic opening at collection — no manual unlocking
Stays shut if tipped — patented safety device
Resists weather, animals & vandalism
Fits standard containers — custom solutions on request
Chemical-resistant housing (acids, alkalis, oil, petrol)
Europe's leading bin-lock supplier
Heritage
Trusted Since 1838
S. Franzen Söhne GmbH has engineered precision locking systems for nearly two centuries and is Europe's leading supplier of locking systems for waste disposal — a development and manufacturing partner for high-quality locks across the automotive, luggage and security industries.
Est. 1838
Est. 1838
Patented gravity lock
Patented gravity lock
Europe's #1 bin lock
Europe's #1 bin lock
Custom development partner
Custom development partner
Heritage
Trusted Since 1838
S. Franzen Söhne GmbH has engineered precision locking systems for nearly two centuries and is Europe's leading supplier of locking systems for waste disposal — a development and manufacturing partner for high-quality locks across the automotive, luggage and security industries.
Est. 1838
Patented gravity lock
Europe's #1 bin lock
Custom development partner
At a Glance
Why Councils Choose Franzen
Stops illegal dumping — only keyholders can open the bin
Protects weight-based billing integrity
Automatic opening at collection — no manual unlocking
Stays shut if tipped — patented safety device
Resists weather, animals & vandalism
Fits standard containers — custom solutions on request
Chemical-resistant housing (acids, alkalis, oil, petrol)
Europe's leading bin-lock supplier
Better Together
Franzen + Zeroloop
Franzen secures the bin; Zeroloop makes it smart. Real-time fill sensors, GPS tracking and AI-routed pickups tell you exactly when each bin is ready — Franzen's gravity lock makes sure only the right waste is inside, and opens automatically when the truck arrives.
Franzen security
Locked bins, accurate contents, automatic opening at collection.
Zeroloop intelligence
Knows exactly when each secured bin is ready to collect.
Accurate data, secure bins, automated collection.
the solution
The Automatic Gravity Lock
Franzen's patented gravity lock does the thinking for you. The lid stays locked through everyday handling — and a built-in safety device keeps it shut even if the bin is knocked over. When the truck lifts and tips the bin, gravity releases the lock automatically; set the bin down and it re-locks on its own.
Stays locked — secured against access, animals, wind and vandalism.
Tips to empty — gravity opens the lock automatically during collection.
Re-locks itself — closes securely the moment the bin is upright again.
the system
Built From Four Parts
Decades of engineering, refined into a system that fits standard waste containers — and can be tailored to yours.
Upper lid part — key, triangular, knob or custom
Lower lid part
Lock part
Dowel — fastens the lock part