Introduction
Honeywell PX series industrial barcode printers are widely used in manufacturing, logistics, apparel, electronics, and packaging industries. Among the most popular models are PX4i, PX4ie, PX6i, PX6ie, PX45, and PX65.
Although these printers belong to the same PX family, their printheads differ in size, performance positioning, and compatibility groups. Understanding these differences is critical when purchasing replacement printheads, planning maintenance, or managing spare parts inventory.
This article provides a clear, practical explanation of:
- The main differences between these models
- How their printheads are classified
- Which printheads are compatible or interchangeable
1. Model Positioning Overview
Honeywell's PX series is mainly divided by print width and generation:
🔹 4-inch class printers
PX4i – Classic industrial model
PX4ie – Upgraded replacement of PX4i (faster CPU, more memory, modern interfaces)
PX45 – New-generation high-performance 4-inch industrial printer
🔹 6-inch class printers
PX6i – Classic 6-inch industrial model
PX6ie – Upgraded version of PX6i
PX65 – New-generation high-performance 6-inch industrial printer
👉 The most important distinction:
PX4 series = 4-inch print width
PX6 series = 6-inch print width
This directly determines the physical size of the printhead.
2. Key Differences Between the Printheads
(1) Print Width & Physical Size
| Series | Print Width | Printhead Length |
|---|---|---|
| PX4i / PX4ie / PX45 | ~4 inch | Shorter printhead |
| PX6i / PX6ie / PX65 | ~6 inch | Wider printhead |
➡ 4-inch and 6-inch printheads are NOT physically interchangeable.
(2) Resolution Options
Depending on configuration, PX series printheads are commonly available in:
203 dpi
300 dpi
406 dpi (mainly for PX4 class high-precision applications)
➡ Printheads with different DPI are not interchangeable, even within the same model.
(3) Generation & Performance
Although print quality principles are the same, newer models (PX4ie, PX6ie, PX45, PX65) are designed for:
Higher data processing speed
Better firmware support
Expanded connectivity (Gigabit Ethernet, USB Host, WLAN, RFID options)
More advanced industrial automation environments
The printhead structure and interface were kept compatible within each width class to support long-term service continuity.
3. Printhead Compatibility Explained (Most Important Section)
✅ Compatible / Interchangeable Groups
✔ Group A – 4-inch family
PX4i
PX4ie
PX45
These models share compatible printhead designs.
In most cases, their printheads are interchangeable within this group, provided that:
The DPI is identical
The correct Honeywell part number is used
The complete printhead kit is installed (not only the bare ceramic head)
✔ Group B – 6-inch family
PX6i
PX6ie
PX65
These models also share compatible printhead designs and can generally use the same printhead kits, again with the condition that DPI and part numbers match.
❌ Not Compatible
Any PX4 series printhead cannot be used in PX6 printers
Any PX6 series printhead cannot be used in PX4 printers
Reason:
Different print width, mechanical frame size, heating element length, and mounting structure.
4. Important Notes When Replacing a Printhead
To avoid installation problems and print quality issues, always follow these principles:
🔧 1. Replace the complete printhead kit
Not only the ceramic heating element, but also:
Cables
Brackets
Pressure components
Insulation parts
This ensures correct contact pressure and signal stability.
🔍 2. Verify three parameters before purchase
Printer model (PX4i / PX4ie / PX45 / PX6i / PX6ie / PX65)
Resolution (203 / 300 / 406 dpi)
Original part number
⚙ 3. Perform calibration after replacement
After installation, always run:
Media calibration
Sensor calibration
Printhead test (dead dot test and uniformity check)
This guarantees stable printing and extends printhead life.
5. Typical Application Differences
| Model | Typical Applications |
|---|---|
| PX4i / PX4ie | Manufacturing, electronics, logistics, compliance labeling |
| PX45 | High-speed production lines, automation systems, RFID projects |
| PX6i / PX6ie | Chemical, drum labels, carton labeling, wide logistics labels |
| PX65 | High-volume wide-format industrial printing, pallet and carton identification |
6. FAQ – Frequently Asked Questions
Q: Is PX4ie a direct replacement for PX4i?
A: Yes. PX4ie was developed as the next-generation replacement of PX4i. Their printheads are generally compatible when DPI and part numbers match.
Q: Can I install a PX4 printhead into a PX6 printer?
A: 4-inch and 6-inch printheads are physically different and cannot be installed across series.
Q: Can PX65 and PX6ie use the same printhead?
A: In most standard configurations, yes. They belong to the same 6-inch platform family and share compatible printhead kits.
Q: Why does my new printhead print unevenly?
A: Possible reasons include incorrect pressure adjustment, missing kit components, wrong DPI configuration, or lack of calibration after installation.
Conclusion
When selecting or replacing a Honeywell PX series printhead:
PX4i / PX4ie / PX45 form one compatible 4-inch family
PX6i / PX6ie / PX65 form one compatible 6-inch family
Cross-family replacement is not possible
DPI, part number, and full kit replacement are critical
Understanding these distinctions helps avoid wrong purchases, machine damage, and production downtime.
Reference (Important Source)
PX4i/PX6i Industrial Printer Data Sheet (Honeywell/Intermec).by Honeywell
PX4ie/PX6ie User Manual (PXie series).by CNFT Content
Specification and Data Manual for PX45/PX65 Series. by Honeywell
Honeywell support documentation: PX4ie/PX6ie/PX45/PX65 print header part numbers and compatibility statements. by Honeywell SPS Support
Honeywell support article: Instructions for print head interchangeability (recommendations for replacing the complete printhead kit). by Honeywell SPS Support
