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About piezobrush PZ3-i Plasma Surface Treatment

piezobrush PZ3-i setThe Relyon Plasma piezobrush® PZ3-i cold plasma unit provides surface treatment and activation prior to bonding, printing or laminating. Based on the very successful handheld piezobrush PZ3, but built specifically for integration into new or existing semi-automated or automated production lines, the piezobrush PZ3-i combines the effectiveness of plasma surface activation for improved adhesion, wetting, and cleanliness of substrates, with the superior productivity and repeatability of automation and robotics. It is compact, lightweight, modular, safe and efficient – and can be quickly and easily integrated into production lines in partially or fully automated systems, or is stand mountable for benchtop use. The device is intuitive to operate and can be maintained without tools.

Using Piezoelectric Direct Discharge (PDD®) Technology, which has been developed by Relyon Plasma, the device transforms low input voltage into high electric field strengths, dissociating and ionizing the ambient gas (normally air, but other process gasses can be used). This process generates cold-active plasma at a temperature of less than 50°C, meaning that it can be used to treat temperature-sensitive substrates.

Capable of effectively processing areas at speeds of up to 150mm/s, the system allows the efficient treating of components without delaying subsequent processes, improving productivity. For an optimised process, the system’s digital IO gives power output adjustment and on/off function – allowing the pinning down of the process variables: position, power, air pressure and time.


  • Surface treatment of plastics, glasses, ceramics, metals, composites and natural materials
  • Activation of a wide variety of base materials
  • Optimisation of bonding, printing and lamination processes
  • Selective improvement of wettability
  • Fine cleaning of surfaces, odour reduction
  • Alternative to chemical primers, flame treatment processes and mechanical roughening

One advantage of the piezobrush is that excitation of gas molecules is highly efficient and safe – but with a very high power density. In practice, a processing performance level is now achieved that had previously been possible only by means of considerably larger installations. The piezobrush PZ3-i does not require an elaborate infrastructure and is easy and intuitive to integrate and operate.

Should you require a purpose-built system for your semi-automated application, our technical team are able to integrate surface preparation equipment, dispensing valves and pumps, curing lamps and material feed reservoirs into an archytas enclosure, customised for your particular needs.

The piezobrush PZ3 is also available in a convenient and lightweight handheld format, granting the benefits of plasma surface treatment with several built-in process control features.

Features & Benefits

piezobrush PZ3-i Nearfield Module

  • Uses “cold plasma” to enable treatment of temperature-sensitive substrates
  • Control over variables (positioning, power, time, input gas pressure) for a repeatable, controllable and recordable process
  • Robot or machine mountable for precision and productivity
  • Very simple to implement – lightweight, only requires 24V DC power and dry compressed air
  • Control of output power via a variable 24V DC input
  • Safe – generally no light barrier, mechanical enclosure or PPE required. Local ventilation recommended
  • Efficient and environmentally friendly – energy efficient, no chemicals, no consumables
  • Reduces health & safety concerns from primers
  • Interchange plasma modules without tools for substrate and process changes
  • Modular design allows multiple units to be mounted adjacently for wide or large area treatment
  • LED status lights and I/O indicate faults


piezobrush PZ3-i multiple mountedThe Piezobrush PZ3-i is suitable for use in semi-automated and automated production lines in applications including:

  • Medical
    Filters, cell wells, test tubes, catheters, syringes, petri-dishes, needle hubs, lenses
  • Automotive
    Fuse covers, engine parts, air bag covers, rubber profiles, tubing, headlights
  • Electronics
    Cable, switches, polyester pcb’s, housings & enclosures, screens
  • Consumer
    Irons, blenders, shakers, measuring containers
  • Food, cosmetics & drug
    Bottles, caps, jars, tubes
  • Professional model making
    Preparing materials such as glass, GRP, ABS and other synthetic materials for bonding

The Piezobrush allows simple germ reduction on a great variety of surfaces such as glass, plastics or metals and thus provides excellent support in effecting processes in the field of microbiology, medicine, microfluidics or food engineering.


Typical treatment speed 1 – 15 mm/s (fine cleaning)
10 -150 mm/s (bonding)
100 – 1500 mm/s (printing)
Typical treatment distance 2 – 10 mm
Typical treatment width 5 – 29 mm (compressed air), up to 50 mm (nitrogen), modularly expandable
Plasma gas temperature < 50 °C
Process control Communication interface and status monitoring
Modules Standard and nearfield
Module position Individually and independently adjustable
Activation efficiency 90 m2/kWh
Process gas Compressed dry air, nitrogen. other gas types on request
Dimensions (mm) 40 x 157 x 71
Electrical connection 24V DC
Weight 380g


In order to achieve optimised surface activation for different substrates, the piezobrush PZ3-i has been equipped with two interchangeable modules (the same modules as the piezobrush PZ3).

piezobrush Standard Module PZ3 Standard module

This module is designed for the surface treatment of non-conductive substrates such as plastics, ceramics or glass. For effective treatment, a module-to-substrate distance of 1 to 5 mm is recommended. If uncontrolled arcing occurs on the substrate during use, the device switches off automatically. In this case the surface is at least partially conductive and should therefore be treated with the Nearfield module.

piezobrush Nearfield Module PZ3 Nearfield module

This module is used to treat electrically or partially electrically conductive materials such as metals, CFRP, indium tin oxide or conductive plastics. However, this module may also be necessary for the ideal treatment of materials with conductive coatings or assemblies with conductive components. With this module, the plasma only ignites when it is close enough to a conductive surface (this may also be hidden under a thin insulating layer). At a distance of a few millimetres, a violet glow is visible in the gap between module and substrate indicating that the treatment is being performed.

The device detects which module is installed and automatically adjusts the parameters accordingly.

Other Information

Find out more about the technology behind the PZ3-i by reading our technical bulletins and white papers:

See how the piezobrush works as part of a real application in this plasma surface treatment Case Study:

Increasing the strength of bondlines in 3D-printed assemblies threefold Increasing the strength of bondlines in 3D printed assemblies threefold

A significant challenge for Creabis GmbH, a 3D printing service provider, is the 3D printing of large and complex components, as normally 3D printers have maximum component dimensions of ~600mm. To make use of the advantages of 3D printing for larger components, they are printed as individual parts and then bonded together. Plasma surface treatment greatly enhances the strength of the bonds on these 3D-printed assemblies.

All Downloads

Filename Size Download
piezobrush PZ3-i product bulletin 0.18MB
Cold Plasma in the Electronics Industry 0.34MB
Whitepaper: Plasma Technology for Surface Cleaning 0.31MB
Case Study: Relyon Piezobrush PZ2 at Creabis GmbH 0.24MB

Ordering Information

Part number Description
REL1000700000 Relyon PZ3-i piezobrush for automated applications
REL1000700100 Relyon PZ3-i connection line package
REL1000650100 Relyon Plasma piezobrush PZ3-i – standard module
REL1000650200 Relyon Plasma piezobrush PZ3-i – nearfield module


Next Steps

Our technical sales team are on hand to discuss your application requirements. Click here to get in touch.

Find out more information on how to purchase.


  • Last updated: May 2022
  • Version: 1.0

Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in any manner as warrantees expressed or implied. The user shall determine the suitability of the product for his intended use and the user assumes all risk and liability whatsoever in connection therewith.