Product Description
Engineered for applications where space is at a absolute premium, the Honeywell PX4i 400 dpi printhead delivers uncompromising clarity down to the smallest detail. With a resolution of 16 dots per millimeter (400 dots per inch), this configuration renders razor-sharp 2D matrix codes, 3pt micro-text, and intricate vector graphics without bleeding or edge distortion. It bridges the gap between high-speed industrial durability and near-photographic print quality, ensuring 100% scan accuracy on high-density labels.
Honeywell specifically positions the PX4i 406 DPI configuration for precision labeling without loss of speed. The printer supports 100–250 mm/s at 406 dpi (4–10 ips), making the high-resolution configuration suitable for production environments where print detail and throughput are both important.
Key Specifications
| Item | Specification |
| Product Type | Thermal Printhead |
| Printer Model | Honeywell PX4i |
| Resolution | 406 dpi / 16 dots/mm |
| Market Description | 400 DPI Printhead |
| Part Number | 850-812-900 |
| Printing Technology | Direct Thermal / Thermal Transfer |
| Application | Industrial Label Printing |
| Printhead Type | Replacement Printhead Assembly |
Honeywell's documentation confirms that the PX4i supports a 406 dpi printhead configuration and identifies the 400 dpi printhead family as 850-812-9xx; the spare-parts catalog specifies 850-812-900.
Main Features and Advantages
The 400 dpi class printhead provides 406 dpi / 16 dots per millimeter resolution, producing crisp characters, fine graphics, and high-density barcodes. It is especially suitable for labels where small details and print precision are important.
Developed for the Honeywell PX4i platform, this printhead is intended as a direct replacement for the 400 dpi configuration. The official PX4i documentation identifies 850-812-9xx as the 400 dpi printhead option, while the spare-parts catalog lists 850-812-900.
The PX4i is an industrial printer designed for high-volume and demanding applications. A suitable replacement printhead helps maintain consistent print quality and minimize interruptions caused by worn or damaged printhead elements.
The high resolution is well suited to applications involving small fonts, 1D/2D barcodes, product identification, logistics labels, and compliance information, where accurate and legible printing is essential.
Why Buy Honeywell PX4i 400 DPI Thermal Printhead from Us
1. Genuine-Compatible Product Expertise
We specialize in thermal printheads for industrial barcode printers and can help customers identify the correct PX4i printhead according to printer model, resolution, and part number, reducing the risk of ordering an incompatible component.
2. Professional Pre-Sales Support
Before shipment, we can verify your printer information and printhead requirements. This is especially useful when PX4i printers are available in multiple resolutions, including 203, 300, and 406 dpi configurations.
3. Reliable Replacement Supply
We support replacement requirements for maintenance, repair, and long-term industrial printer operation. Our goal is to provide stable product quality and dependable supply for both small replacement orders and regular purchasing.
4. International B2B Service
We work with overseas customers on product confirmation, quotation, packaging, shipping, and after-sales communication, providing a convenient sourcing solution for Honeywell PX4i replacement parts.
Exclusive Target Use Cases
- Electronics & Semiconductor Manufacturing: Direct marking for PCB components, micro-relays, and high-density serial labels requiring sub-5mm 2D Data Matrix codes.
- Pharmaceutical & Medical Device Labeling: Vial, syringe, and specimen labeling containing dense FDA UDI (Unique Device Identification) codes and extensive multi-language regulatory text.
- Aerospace & Defense Parts Tracking: Small-component identification tags complying with strict MIL-STD-130 UID standards that require high-density Data Matrix rendering.
- Jewelry & Small Asset Tagging: Ultra-narrow rat-tail and barbell tags where printable surface area is limited to a few square millimeters.
- Automotive & Aerospace Sub-Assembly: Produce durable, high-density parts-tracking tags that withstand harsh industrial environments while remaining 100% scannable.
- Regulatory & Compliance Marking: High-density warning symbols, international certification logos, and fine-print legal disclosures.
Product Applications
The PX4i 400 dpi printhead is suitable for product labeling, logistics and shipping labels, inventory identification, retail labeling, pharmaceutical and healthcare labels, electronic component labels, and other applications requiring high-resolution barcode and text printing.
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Technical Specification Differential
| Parameter | PX4i (400 dpi Configuration) | Application Benefit |
| Print Resolution | 16 dots/mm (400 dpi) | 33% higher resolution than 300 dpi; prevents scan failures on ultra-dense 2D barcodes |
| Max Print Speed | Up to 250 mm/s (10 ips) | Optimized thermal balance for high-density rendering without sacrificing industrial throughput |
| Min. Text / Element Size | 3 pt font / 2.5 mil 1D Barcode | Legible micro-branding, regulatory warnings, and high-density PCB/component marking |
| Max Print Width | 106 mm (4.17 in) | Standard 4-inch footprint optimized for multi-up small-label layouts |
Key Differentiating Feature
400 DPI High-Resolution Engine
- Sub-Millimeter Micro-Labeling: Precise rendering of tiny 2D Data Matrix codes and fonts as small as 4 pt without pixelation or scan failures.
- Maximizable Label Real Estate: Pack extensive traceability data, standard compliance icons, and serialized tracking info into ultra-compact label footprints.
- Zero-Smudge Edge Definition: High thermal resolution ensures clean contrast and exact edge definition on challenging heat-sensitive and synthetic media.
Important Compatibility Note
Please confirm your printer model and required print resolution before ordering. The PX4i is available with multiple printhead resolutions, including 203 dpi, 300 dpi, and the high-resolution 406 dpi configuration. The 850-812-900 printhead is identified in Honeywell/Intermec documentation as the 400 dpi PX4i printhead assembly.
Why Choose 400 dpi Over 300 dpi?
While the PX4i 300 dpi is the workhorse for standard shipping, compliance, and pallet labeling, the 400 dpi model is built for information-dense operations. Upgrading to 400 dpi allows you to condense massive amounts of batch, tracking, and compliance data into significantly smaller label footprints-reducing media consumption costs while maintaining strict compliance with high-precision optical scanners.
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