Citizen CT-S801III Receipt Printer
Premium top-exit thermal receipt printer for high-volume retail, restaurant checkout, service counters, and tablet-based POS setups.
View CT-S801III USB + BluetoothCitizen CT-S801 & CT-S851 Receipt Printers
Citizen POS printer buyer guide
Citizen CT-S801 & CT-S851 Receipt Printer Series
Compare the Citizen CT-S801 and CT-S851 thermal receipt printer families, including CT-S801II, CT-S851II, CT-S801III, and CT-S851III models. Learn the differences, choose the right paper exit, review specs and interfaces, and shop compatible POS printer options from Spartan POS.
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Fast decision guide
Quick Answer: CT-S801 vs. CT-S851
Choose the Citizen CT-S801 when you want a top-exit receipt printer for retail checkout lanes, service desks, convenience stores, grocery counters, and traditional POS stations. Choose the Citizen CT-S851 when you want a front-exit receipt printer for restaurants, bars, kitchens, hospitality counters, or any location where spills, shelves, or tight counter space make front paper exit easier.
Best retail pick
CT-S801II or CT-S801III for fast top-exit printing at a checkout counter.
Best restaurant pick
CT-S851II or CT-S851III for front-exit receipt, order, and kitchen ticket printing.
Fastest generation
CT-S801III and CT-S851III support high-speed printing up to 500 mm/sec on supported configurations.
Popular Spartan POS options
Shop Citizen CT-S801 and CT-S851 Printer Options
Start with the current high-speed models below, or browse the full Citizen receipt printer collection for USB, Ethernet, Bluetooth, serial, parallel, Powered USB, and wireless configurations.
Citizen CT-S851III Receipt Printer
Front-exit thermal receipt printer for retail, restaurants, hospitality counters, and tight or spill-prone POS environments.
View CT-S851III USB
Front-Exit USB + Serial Option
Choose USB + serial when you need a front-exit receipt printer for modern POS hardware plus legacy serial compatibility.
View CT-S851III USB + SerialProduct overview
What Are the Citizen CT-S801 and CT-S851 Printer Series?
Citizen CT-S801 Series
The CT-S801 family is the top-exit side of Citizen's high-performance POS receipt printer line. It is built for fast direct thermal printing, easy drop-in paper loading, LCD-guided operation, auto cutting, cash drawer kick-out, and flexible POS connectivity. It is the natural choice for retailers and service counters where receipts should feed upward from the printer.
- Top paper exit for retail counters and standard POS lanes
- Direct thermal printing with no ink or toner
- LCD panel for status, setup, and error messages
- Available with modern and legacy interface options by configuration
Citizen CT-S851 Series
The CT-S851 family is the front-exit version. It shares many of the same core technologies as the CT-S801, but the paper exits from the front. That makes it a strong fit for restaurants, bars, hospitality counters, kitchens, and workstations where the printer may sit under a shelf or near areas where moisture, dust, or debris could affect top-exit paper.
- Front paper exit for hospitality, kitchen, and tight-counter setups
- Spill-resistant front-exit design on supported models
- Fast quiet thermal output for receipts and order tickets
- Strong option for restaurant POS and bar stations
Side-by-side comparison
Citizen CT-S801 vs. CT-S851 Comparison
The biggest difference is paper exit direction. CT-S801 is top-exit. CT-S851 is front-exit. After that, choose the generation and interface that match your POS system.
| Feature | Citizen CT-S801 Series | Citizen CT-S851 Series |
|---|---|---|
| Paper exit | Top exit | Front exit |
| Best fit | Retail checkout, grocery, convenience, specialty retail, service desks | Restaurants, bars, hospitality, kitchens, under-shelf counters, spill-prone spaces |
| Print method | Direct thermal | Direct thermal |
| Resolution | 203 dpi | 203 dpi |
| Max speed, II generation | Up to 300 mm/sec | Up to 300 mm/sec |
| Max speed, III generation | Up to 500 mm/sec | Up to 500 mm/sec |
| Paper widths | 58, 60, 80, and 82.5 mm on many configurations | 58, 60, 80, and 83 mm on many configurations |
| LCD operation panel | Yes | Yes |
| Auto cutter | Guillotine cutter with full and partial cut support | Guillotine cutter with full and partial cut support |
| Cash drawer support | Supports cash drawer kick-out on supported configurations | Supports cash drawer kick-out on supported configurations |
| Common interfaces | USB plus optional Ethernet, Bluetooth, serial, parallel, wireless LAN, USB hub, Powered USB by model | USB plus optional Ethernet, Bluetooth, serial, parallel, wireless LAN, USB hub, Powered USB by model |
Spartan POS tip: Choose the exit direction first, then choose the connection type. For a single register, USB is usually simple. For kitchen routing or shared network printing, Ethernet is often the better long-term choice. For tablet POS, verify the exact Bluetooth, iOS, Android, and POS software requirements before ordering.
Technical specifications
Key Specs for the CT-S801II, CT-S851II, CT-S801III, and CT-S851III
Exact specifications vary by part number, interface card, paper-width setting, and region. Use this as a buying guide, then confirm the exact SKU before ordering.
Print technologyDirect thermal receipt printing; no ink or toner required.
Resolution203 dpi on CT-S801 and CT-S851 family models.
Print speedII series: up to 300 mm/sec. III series: up to 500 mm/sec.
Maximum print widthUp to 80 mm on supported configurations.
Paper widthsCommon support for 58 mm, 60 mm, 80 mm, 82.5 mm, or 83 mm depending on model.
Maximum roll sizeUp to 83 mm outside diameter on many CT-S801/CT-S851 configurations.
EmulationESC/POS support for broad POS software compatibility.
Barcode supportCommon barcode and 2D symbols, including QR Code and PDF417 on supported models.
InterfacesUSB plus optional serial, parallel, Ethernet/wired LAN, wireless LAN, Bluetooth, USB hub, USB host plus Ethernet, and Powered USB by SKU.
CutterGuillotine auto cutter with full and partial cut support.
Cash drawerDrawer kick-out support for compatible POS cash drawers.
Reliability ratingsCitizen lists printhead and cutter life ratings under specified conditions and recommended media.
CT-S801III highlights
- Top-exit printer for retail-focused POS layouts
- Up to 500 mm/sec print speed
- 203 dpi direct thermal output
- USB standard with optional WiFi, serial, Bluetooth, Ethernet, and parallel options by configuration
- Drop-in paper loading, LCD panel, auto cutter, and cash drawer support
CT-S851III highlights
- Front-exit printer for hospitality and spill-prone environments
- Up to 500 mm/sec print speed
- 203 dpi direct thermal output
- USB standard with optional WiFi, serial, Bluetooth, Ethernet, and parallel options by configuration
- Designed for hospitality, kiosk, kitchen, and retail applications
Options and configurations
Available Options to Check Before You Buy
Connectivity
Match the printer to your POS terminal and software. Common options include USB, Ethernet, serial, parallel, Bluetooth, wireless LAN, Powered USB, and USB hub configurations. Not every interface is available on every SKU.
Paper width
Most businesses use 80 mm / 3 1/8 inch thermal receipt paper, but many configurations also support narrower 58 mm or 60 mm rolls. Confirm the paper guides and software receipt width before deployment.
Power supply
Some configurations use an internal or detachable power supply, while others may use an external adapter. Choose the option that keeps your counter clean and works with the available outlet layout.
Color
Black and white body options exist in the broader CT-S801 and CT-S851 family. Availability depends on the generation and part number.
Media sensors
Look for paper near-end, black mark, or label-related configurations only when your workflow needs them. Standard receipt printing usually does not require label or black mark options.
Mounting and placement
Counter placement is most common. For wall, vertical, kiosk, or under-shelf installations, verify the exact mounting accessory and model limitations before purchase.
Best use cases
Where the CT-S801 and CT-S851 Fit Best
Retail checkout
The CT-S801 is usually the cleaner fit for retail counters because receipts exit upward and are easy for cashiers to grab beside a POS terminal, scanner, and cash drawer.
Recommended: CT-S801II or CT-S801III with USB for a single station or Ethernet for networked POS.
Restaurants, bars, and hospitality
The CT-S851 is designed for front-exit printing, which is helpful under shelves, at bars, and in locations where top-fed receipts may be exposed to spills or debris.
Recommended: CT-S851II or CT-S851III with Ethernet for kitchen routing or USB for a dedicated POS station.
Kitchen tickets and order slips
Thermal printers are fast and quiet for many kitchen ticket workflows. For hotter or harsher kitchen areas, verify paper storage conditions and whether your kitchen actually requires impact printing instead.
Recommended: CT-S851 front-exit placement where tickets need to feed forward for easy access.
Kiosks, queue tickets, and service counters
Both series can support receipts, tickets, barcodes, and QR codes on supported software. Choose top-exit or front-exit based on how the customer or associate will retrieve the printout.
Recommended: CT-S801III for top-exit kiosk layouts, CT-S851III for front-exit counters.
Healthcare and service environments
For clinics, repair counters, pickup stations, and customer-service desks, choose the exit direction that minimizes clutter and makes printed receipts or labels easy to retrieve.
Tablet and mobile POS
Bluetooth and wireless options can be useful for tablet POS, but compatibility is software-specific. Confirm iOS, Android, Bluetooth, and POS app support before ordering.
Compare mobile receipt printers if you need battery-powered printing.
Media and image guidance
Recommended Media for This Shopify Page
Use product photos, a simple top-exit vs. front-exit diagram, and lifestyle images to improve click-through rate and help shoppers choose faster.
Hero image
Show CT-S801 and CT-S851 side by side. This reinforces the top-exit vs. front-exit decision immediately above the fold.
Comparison graphic
Create one simple diagram: CT-S801 arrow up, CT-S851 arrow forward. Add retail, restaurant, and kitchen icons.
Short video
Record a 30-45 second clip showing receipt output, paper loading, LCD status, and the final call to contact Spartan POS for compatibility help.
Warranty
Citizen CT-S801 and CT-S851 Warranty Overview
For U.S. purchases, Citizen Systems America lists CT-S801, CT-S851, CT-S801II, CT-S851II, CT-S801III, and CT-S851III under its POS packaged/whole thermal printer series with a 3-year warranty period. Warranty terms can vary by region, selling entity, date of purchase, part number, and usage conditions.
Warranty coverage generally does not cover damage from improper installation, incorrect operation, poor maintenance, misuse, excessive duty cycle, unapproved chemicals, non-equivalent supplies, transit damage, or unauthorized modifications. Keep your invoice, serial number, and model number available for any warranty or RMA discussion.
Spartan POS recommendation: Confirm warranty coverage at time of purchase for the exact SKU you order. If you are replacing a failed unit, compare the repair cost against a newer CT-S801III or CT-S851III upgrade with the interface your POS will use long term.
Maintenance
Maintenance Guide for Reliable Receipt Printing
Routine care checklist
- Use quality thermal receipt paper that matches the printer specifications.
- Store paper away from heat, moisture, direct sunlight, and chemicals.
- Keep the paper path clear of scraps, dust, and torn paper.
- Clean the exterior with approved methods and never spray liquid directly into the printer.
- Power off and let the printhead cool before internal cleaning.
Suggested cleaning schedule
| Interval | Task |
|---|---|
| Daily | Check paper level, confirm clean receipt output, and remove loose paper scraps. |
| Weekly | Inspect the paper path, cutter area, and cable connections. |
| Every 2-3 months | Clean the printhead, platen, and sensor areas according to Citizen maintenance guidance. |
| As needed | Update drivers, review interface settings, and replace worn or damaged cables. |
Paper loading basics
Open the paper cover, drop the roll into the compartment with the thermal side oriented correctly, pull a small amount of paper straight out, and close the cover until it clicks. If receipts print blank, the roll is usually loaded backward or the paper is not thermal paper.
Troubleshooting and repairs
Common Problems, Fixes, and Repair Decisions
Printer does not print
Check power, interface cable, POS software printer selection, driver, port settings, and paper status. For Ethernet printers, print or view the network settings and confirm the IP address.
Faded or light receipts
Start with the simplest causes: wrong paper, old thermal paper, dirty printhead, dirty platen, or print density settings. If cleaning and correct paper do not help, the printhead may require service.
Paper jam or cutter lock
Power off when appropriate, remove jammed paper and scraps, reload the paper correctly, and never force the cutter blade. Repeated cutter issues may point to debris, paper thickness problems, worn cutter parts, or physical damage.
Cash drawer does not open
Confirm the drawer is plugged into the printer drawer kick-out port, the cable is correct, the POS software is sending the open-drawer command, and the printer is online.
Network printer not found
Check DHCP/static IP settings, subnet, router, POS station firewall, Ethernet cable, and POS port configuration. For kitchen printing, a wired Ethernet setup is often more stable than wireless.
Repair vs. replace
Repair may make sense for cable, interface, configuration, cutter jam, or cleaning-related issues. Replacement often makes more sense for liquid damage, repeated cutter failures, worn printheads, unsupported legacy interfaces, or when upgrading to faster III series hardware.
Spartan POS buying guide
How to Choose the Right Model in 60 Seconds
1. Choose paper exit
Top exit: choose CT-S801 for most retail counters. Front exit: choose CT-S851 for restaurants, bars, kitchens, and tight spaces.
2. Choose connection
USB: direct POS terminal. Ethernet: networked stations and kitchen routing. Bluetooth/wireless: tablet or cable-light setups, only after software compatibility is confirmed.
3. Add supplies
Add compatible thermal receipt paper, a cash drawer, and a barcode scanner to complete the POS station.
FAQ
Citizen CT-S801 and CT-S851 Frequently Asked Questions
What is the difference between the Citizen CT-S801 and CT-S851?
The CT-S801 is a top-exit thermal receipt printer that works well for retail counters and standard POS lanes. The CT-S851 is a front-exit thermal receipt printer that is better for restaurants, bars, hospitality counters, kitchens, and tight spaces where forward-facing receipt output is easier to access.
Are the CT-S801 and CT-S851 thermal printers?
Yes. The CT-S801 and CT-S851 families are direct thermal receipt printers. They use thermal receipt paper and do not require ink or toner.
How fast do these Citizen printers print?
The CT-S801II and CT-S851II print at up to 300 mm/sec. The newer CT-S801III and CT-S851III support up to 500 mm/sec on supported configurations.
What paper size do the CT-S801 and CT-S851 use?
Many models support 58 mm, 60 mm, 80 mm, 82.5 mm, or 83 mm thermal receipt paper depending on the exact configuration. Standard 3 1/8 inch, 80 mm thermal receipt paper is common for POS receipt printing.
Do these printers support Ethernet?
Yes, Ethernet or wired LAN is available on supported configurations. Ethernet is often a strong choice for networked POS environments and kitchen routing.
Do the CT-S801 and CT-S851 support Bluetooth or tablet POS?
Bluetooth is available on selected configurations, including models intended for modern POS setups. Always confirm compatibility with your POS software, operating system, and exact printer SKU before ordering.
Can these printers open a cash drawer?
Yes. Supported CT-S801 and CT-S851 configurations include cash drawer kick-out support for compatible POS cash drawers.
Which model is best for a restaurant kitchen?
The CT-S851 is usually the better fit when you want a front-exit thermal printer for kitchen or hospitality workflows. For especially hot, greasy, or harsh kitchen environments, verify whether thermal printing or impact printing is better for your use case.
How often should I clean a Citizen CT-S801 or CT-S851 printer?
A practical schedule is to inspect the printer weekly and perform deeper cleaning every 2-3 months, or more often in dusty, high-volume, or kitchen environments. Always turn the printer off and let the printhead cool before internal cleaning.
What should I do if the cutter locks?
Do not force the cutter. Remove jammed paper and scraps, reload the paper correctly, and follow the model's manual for cutter recovery. If the cutter continues to lock, the printer may need service or replacement.
What warranty do these Citizen printers have?
For U.S. purchases, Citizen Systems America lists CT-S801, CT-S851, CT-S801II, CT-S851II, CT-S801III, and CT-S851III as POS packaged/whole thermal printer series models with a 3-year warranty period. Confirm the warranty for the exact SKU and selling entity at time of purchase.
Can Spartan POS help me choose the correct interface?
Yes. Contact Spartan POS with your POS software, terminal model, current printer part number, and preferred connection type. A product specialist can help you choose USB, Ethernet, Bluetooth, serial, or another compatible configuration.
Ready to buy?
Get the Right Citizen Receipt Printer for Your POS System
Choose CT-S801 for top-exit retail printing. Choose CT-S851 for front-exit restaurant, bar, kitchen, or hospitality printing. Spartan POS can help you match the right printer, interface, receipt paper, and cash drawer to your existing POS setup.
Spartan POS | 1-888-895-4767 | info@spartanpos.com
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