The New Dimension in 6-Inch Wide Labelling
When standard 4-inch labels aren't enough, the Citizen CL-S6621 steps in to provide a professional, wide-format solution without the footprint of a massive industrial machine. Engineered for versatility, this 6-inch workhorse bridges the gap between desktop convenience and industrial-scale capability, making it the premier choice for A5 pallet labelling, chemical drum marking, and A6 shipping tasks.
Professional Capacity, Desktop Footprint
The Citizen 1000836 (CL-S6621) is unique in the market. It offers a massive 168mm (6.6 inch) print width while utilising the space-saving Hi-Open™ mechanism, which opens vertically to save desk space.
- Unmatched Precision: Features ARCP™ (Active Ribbon Control & Positioning) technology, which eliminates ribbon wrinkling, a common issue in wide-format printing, to ensure every pallet label is perfectly scannable.
- Heavy-Duty Construction: Built with an all-metal printhead and a rugged chassis to withstand the rigours of 24/7 logistics and manufacturing environments.
- Seamless Integration: Equipped with automatic Cross-Emulation, allowing it to speak both Zebra® and Datamax® languages out of the box.
- Fast Throughput: Print at speeds of up to 150mm per second, ensuring high-volume wide labels are produced without delay.
Maximise Your Workflow: Upgrades & Maintenance
A wide printer handles more media, which is why having the right accessories is critical for maintaining peak efficiency.
High-Volume Productivity
- 8-Inch External Label Roll Holder (2000451): Specifically designed for the CL-S6621, this upgrade allows you to use larger industrial rolls, significantly reducing the frequency of media changes during long print runs.
- Dual Connectivity: Standard USB and Serial interfaces ensure compatibility with modern and legacy business systems alike.
Precision Care
- Thermal Printhead Cleaning Pens (4u-Pen-10): Wide printheads have more surface area to protect. Regular use of our cleaning pens prevents the buildup of dust and adhesive, protecting your 203dpi resolution and extending the life of your unit.
Why Buy the CL-S6621 from Northern Label Systems?
We don’t just provide hardware; we provide a 20-year legacy of labelling expertise.
- Free UK Delivery: We ship all wide-format printers and bulk media orders across the UK at no extra cost.
- Specialist Support: Wide-format printing has unique requirements for ribbons and media. Our helpful team will guide you to the exact wax/resin ribbon and synthetic label combination for your specific application.
- Value-Driven Pricing: As one of the UK’s leading Citizen partners, we offer competitive rates on both the 1000836 series and its genuine accessories.
Citizen CL-S6621 Frequently Asked Questions
What is the maximum label width the CL-S6621 can print?
The Citizen CL-S6621 can handle media up to 178mm wide, with a maximum print width of 168mm. This makes it ideal for A5 labels, palette tags, and large-format inventory signs.
Does this printer require a specific type of ribbon?
Because it is a wide-format printer, we recommend high-quality 170mm ribbons. Citizen Printer’s ARCP™ technology ensures that even at this width, the ribbon stays flat and tensioned, preventing the "ghosting" or wrinkling often seen on wider machines.
Is the external roll holder (2000451) easy to install?
Yes. The Citizen 2000451 roll holder clips onto the back of the printer in seconds. It allows you to use 8-inch (200mm) outside diameter rolls, which are common in industrial settings and more cost-effective than smaller desktop rolls.
Can I use the CL-S6621 for chemical drum labelling?
Absolutely. When paired with the correct synthetic labels and resin ribbons, the CL-S6621 is a top choice for Globally Harmonised System (GHS) compliant chemical labelling, due to its wide print area and durable output.
What interfaces come as standard?
The Part No: 1000836 comes with USB 2.0 and RS232 Serial ports. If you require network connectivity, an Ethernet interface card can be added as an internal upgrade.
Why is the Hi-Open™ case better for my workspace?
Most wide-format printers have a clamshell or side-opening lid that requires significant clearance. The Citizen Hi-Open™ case opens vertically, meaning the printer’s footprint never changes, even during a media reload.


