Continuous Inkjet Printers / Case Coder
Reliable Coding with an IP55 Rating for Challenging Environments
Industrial coding and marking equipment have to operate in challenging environments where dust, moisture, and extreme conditions threaten standard printer performance. Unprotected inkjet printers can suffer from clogging, ink degradation, and frequent downtime to fix these issues.
To counter these challenges, IP-rated coding solutions are used to provide better protection against environmental hazards. An ingress protection rating, or an IP rating, is used to classify a printer's ability to resist dust and water exposure to keep printers performing in demanding industries.
What Does IP55 Rating Mean for Inkjet Printers
IP ratings are governed by the IEC 60529 standards and are used to provide a universal classification system for the protection of electrical enclosures against solid particles and liquids.
The IP55 rating consists of two key levels of defense:
The First Digit (Five) - Limited Dust Ingress Protection
- Provides partial but sufficient protection from dust. This makes sure that the printer functions remain unaffected even in powder-heavy or particulate-rich environments.
- Dust cannot accumulate to a level that interferes with internal components or print quality.
The Second Digit (Five) - Water Jet Protection
- Can withstand low-pressure water jets from any direction, which makes the printer suitable for routine cleanings, humid environments, and accidental exposure to moisture.
This makes IP55-rated inkjet printers the best choice for high-throughput industrial applications where exposure to dust and moisture is commonplace.
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Why IP55-Rated Printers Are Essential for Harsh Environments
In industries such as automotive manufacturing, electronics, and construction materials, fine dust particles are everywhere. They accumulate inside inkjet nozzles, which leads to clogging, poor print resolution, and frequent maintenance. Over time, this dust buildup can interfere with print quality, causing production slowdowns and increases operational costs.
In sterile sectors, like pharmaceuticals and beverage bottling, regular washdowns are necessary to maintain strict hygiene standards. In these environments, however, printers need adequate ingress protection as they are vulnerable to corrosion and internal electrical damage when exposed to water.
With IP55-rated printers on production lines, manufacturers can protect equipment from disruptions while maintaining compliance with industry standards.
Key Features of Reliable Coding with IP55 Rating
In the complex challenges posed in industrial coding environments, reliable coding solutions must withstand dust, moisture, and rigorous operational conditions. An IP55-rated printer protects the key components by resisting dust and water infiltration. Automated maintenance and cleaning, monitoring tools, and diagnostics are features of a reliable IP55-rated printer, which will in turn promote uptime and issue resolution before problems arise.
Benefits of Investing in an IP55-Rated Printer for Long-Term Reliability
By investing in an IP55-rated printer, manufacturers gain a future-proof solution that offers significant advantages of continuous high-speed printing. All without the risks of frequent failures or performance inconsistencies. Other benefits include:
- Lower Maintenance Costs: Automated cleaning and self-diagnostic capabilities reduce additional expenses by preventing printhead clogs, ink buildup, and unexpected failures.
- Extended Lifespan: Traditional CIJ printers degrade quickly in dust- and moisture-prone environments, reliable printers should be built to withstand extreme conditions, with a rating of IP55 or higher to enhance the longevity of the machine.
- Industry Compliance: Packaging lines marking procedures must comply with traceability, safety, and quality assurance regulations. Precise and legible prints are needed, as without them the risk of poor adherence to regulations increases.
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How the KEYENCE MK-G Series Delivers High-Quality Prints in Tough Conditions
The KEYENCE MK-G Series has been designed to overcome environmental challenges that are often unforgiving to other inkjet printers. As temperatures fluctuate and humidity and dust gather, print clarity and consistency suffer. With its real-time ink adjustments and advanced cleaning cycles, the MK-G Series can remain reliable without sacrificing performance:
- Real-Time Ink Adjustments for Temperature Stability: The MK-G Series eliminates temperature-based ink issues by analyzing ink viscosity and flow rates 10 times per second, providing a high-quality print even in factory heat and humidity.
- Prevention of Ink Dilution During Cleaning Cycles: Routine maintenance can lead to inconsistent print density and weak character definition. To fix this, the MK-G Series features a conditioning tank system that recycles cleaning solvent without diluting the ink concentration.
- Precision Coding: Traditional CIJ printers often struggle to maintain accuracy at rapid speeds, which results in distorted characters, incomplete codes, or unreadable barcodes. The MK-G Series is engineered with an IP55-rated structure for high-speed printing that maintains quality, even in a fast-moving and harsh automated production environment.
A Robust Solution for Your Industrial Coding Needs
The KEYENCE MK-G Series is the world’s first self-troubleshooting CIJ printer, designed to maximize efficiency, minimize downtime, and seamlessly integrate into industrial production lines. The MK-G Series also features a Smart Startup and Shutdown feature that self-diagnoses before and after each cycle run to help prevent failures. Its all-around IP55-rated structure, including the printhead, the MK Dock, and the Operation Assist Camera, ensures total protection against dust, moisture, and harsh factory environments.
As it is built for high-impact environments and is rated IP55, it can withstand factory vibrations, drops, and other extreme conditions. With automated ink viscosity adjustments and its rugged structure, the MK-G is a reliable choice for high-speed industrial coding.
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FAQs on IP55-Rated Printers
What Is the Difference Between an IP55 Rating and Other IP Ratings?
IP55 provides better water jet resistance than IP54, which only protects against splashes. IP65, on the other hand, is fully dust-tight, whereas IP55 offers a balance of protection and easier maintenance.
Can the KEYENCE MK-G Series Continuous Inkjet Printer Be Used for Applications That Require Ink With Specific Color Properties?
Yes, it supports various ink types to maintain sharp contrast and high visibility.
Is the KEYENCE MK-G Series Inkjet Printer Easy to Integrate Into Existing Production Lines?
Its compact, modular design can be added to both new and existing setups. The MK-G Series features remote monitoring that helps simplify adjustments and system management.
How Does the KEYENCE MK-G Series Handle Variable Data Printing?
The MK-G Series enables real-time data encoding for batch numbers, expiration dates, and barcodes on various substrates.
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Related Downloads

This guide explains continuous inkjet (CIJ) printer applications together with pictures and illustrations. It contains many installation examples in various industries divided into food, medicine, and cosmetics; electrical machinery and electronics; and automotive, metal, and others. These examples show printing on targets specific to each industry.