MPI Bench Units

SBU 1500

Small Bench Unit

MPI Bench Unit

The SBU 1500 is a bespoke small bench unit for performing MPI. The SBU 1500 includes AC current flow energising modes as standard with optional HWDC and FWDC current flow and magnet flow (FWDC) modes available. Typically the SBU 1500 sits on a work bench and is small enough to be moved around if necessary using the side mounted handles - Although this unit can be free standing if required.

The variable position head-stock use a simple lever operated clamping mechanism to grip components between the U2 type 60mm diameter Copper gauze contact pads. The SBU 1500 is supplied with heavy duty energising foot pedal and fully calibrated with the relevant paperwork as standard.

Control System

Johnson & Allen MPI Bench Units are built around one of three control systems - The Manual System, Start System and the Plato 3 System.

  Manual System Start System Plato 3 System
Manual Current Regulation
Automatic Current Regulation  
Shot Timer Optional

Automatic Demagnetising

Quick Break
(for FWDC)
Quick Make    

Button Press Mode Change Over

Optional Optional
Programmable Job Sequences    
Data Acquisition & Monitoring    
Code Loader (Barcode Scanner)    


Plato-3 is a control and monitoring system for MPI bench units and power packs with an emphasis on data recording and traceability.

Click here to read more about the Plato 3 System

Plato-3 includes all the features found in the earlier Plato-2 System like auto-regulated current (dial-an-amp), variable shot timer and programmable job sequences but brings to the table new features, full data acquisition and monitoring and a more intuitive interface displayed on a colour monitor.

UV Inspection Booth

For fluorescent MPI processes the SBU 1500 can include a bespoke UV Inspection Booth to reduce ambient light below the 20 Lux demanded by most MPI standards. UV Inspection Booths are usually free standing and fitted with both UV lights and white lights to give adequate background UV light when inspecting with the option of white light for safely loading components and maintenance.

UV Inspection Booths are built around a sturdy steel frame and panelled with either a PVC canvas or steel sheet. Most UV Inspection Booths also incorporate a number of fans to remove heat and prevent build-up of chemical vapours within the booth.

Bench Accessories

The SBU 1500 can be supplied with a wide range of accessories including threading bars, rigid fixed coils, headstock mounted ‘V’ brackets, mini-jigs and hand-held UV Inspection Lights to aid in inspection processes.

Quality UK Construction

Johnson & Allen pride itself on high quality design and construction which is why the power transformers and coils used in the SBU 1500 are wound, built and extensively tested in-house before they are installed. All Johnson & Allen bench units are designed and manufactured by our experienced team in Sheffield.

Product Data

Input Voltage 230V
Frequency 50Hz
Phase Single
Energising Modes AC (Standard)
Mag. Flow (Optional)
HWDC (Optional)
Current Flow Output 0 - 1500A RMS AC
Mag. Flow Output 16,500 Amp Turns
Metering Digital
Max. Component Length 300mm
Weight 75 kg (Approx.)
Dimensions 760 x 550 x 400mm
Mains Lead 2m

Duty Cycle (Recommended)

6 seconds ON, 30 seconds OFF

Dependant on output current settings.


Talk To Our Team

As with all bespoke builds Johnson & Allen recommend customers contact our technical sales department to discuss their precise needs first. Our experienced team can recommend the most economical way to achieve customer requirements.

Share This Product

MPI Bench Units

Find out more