• About
  • Summary
  • System Specification
  • Measurement Specification

KMS 205 (LMR) Media Testing

KMS 205 is a dynamic and powerful diagnostic Kerr Mapping System ideal for both R&D and production operations. The system is able to automatically create a mapping of the magnetic properties (Hc, S*, SR and OR) of LMR media at any point of the entire disk in accordance to the user's settings or at any pre-defined positions and plot a full hysteresis loop within seconds. In addition, the system will automatically rectify alignment errors and take care of the input position and measurements.

The System is equipped with user-friendly graphing functions and customized mathematical function which provides flexibility to usage by different user groups, for example: operators, technicians and engineers. The ability to measure using a wide range of direct magnetic field and different disk sizes by changing the vaccum disk chuck, provides great felxibility and productivity to the user. The system also comes with read network connectivity for user to connect to the location network.

  • High magnetic field up to 10,000 Oersteds and above
  • 2 to 100 seconds programmable sweep rate
  • High magnetic field resolution
  • Auto Field Feedback ensure constant dH/dt
  • Measurement of Hc, S*, SR and OR of disk media
  • Non-destructive, non-contact measurement
  • Interchangable disk vaccum chuck for different sizes disk inspection
  • Rapid mapping and High accuracy to provide fast process feedback
  • User programmable location and Maps for Measurement


Size (in mm)
1118W x 688D x 1362H
Weight (in KG) :

Operating Environment Requirements

Operating Environment
Cleanroom Class 1,000 or better
Temperature Range :
20°C ± 2°C (68°F ± 3.6°F)
Relative Humidity :
70% and below, Non-condensing

Electrical Requirements

Input Voltage
208VAC, 8A, Single Phase, 3-wire configuration
Frequency :
Input Connection :
3-meter line cord with 208VAC, 8A BS1363 plug

Air Input Requirements

High Pressure Air (HPA)
Clean, dry air at 0.45 ± 0.03 MPa
Incoming Air Inlet :
Ø6mm tubing
Disk Vaccum Setting :

Measurement Specification

Positioning System
Ball screw assist nano-step stepping motor
Disk Holding Chuck
Vaccum-controlled air Suction
Magnetic Properties Measurable
Coercivity (Hc), Coercive Squareness (S*),    Squareness Ratio (SR), Orientation Ratio (OR)
AFC Media Measurable
Major and Minor loop
H, Field Strength Range
10,000 Gauss Max

Measurement Duration (Sweep Rate)


Min. 2sec, max. 90sec

(1 sec is possible but not recommended)
2,000 to 7,000 Oe
± 0.5%
15 Oe
S* :
0.50 to 0.98
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©2007 Seidensha Singapore Pte. Ltd.
Last Updated May 2010