The Ferromaster has been discontinued. Its replacement is the FerroPro.
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The FERROMASTER is a compact, hand-held instrument made for easy measurement of relative magnetic permeability of materials and workpieces with µr between 1.001 and 1.999. The relative permeability is measured by touching the workpiece with the sensor tip and reading the result on the LCD display. The permeability probe contains a small permanent magnet which magnetizes the sample by the probe tip, which then gets read by two sensitive magnetic field sensors and measures the distortion of the magnetic field introduced by the magnetized sample. Calibration can be easily readjusted. The FERROMASTER comes in a robust waterproof case (protection IP65) and is well suited to applications in harsh environments. The built-in battery serves for approximately 50 hours of operation.
Applications
How it Works
The magnetic permeability of a material generally depends heavily on the strength and frequency of the magnetizing field. The probe head of the Ferromaster contains a permanent magnet that generates a constant magnetic field of around 35 kA/m (440 Gauss) at the test probe. Ferromaster works with a saturation core and 2 alternating field coils according to the fluxgate principle and can measure permeabilities in the measuring range between 1.001 and 1.999. Above this measuring range, the saturation cores are too saturated and no longer result in a linear measurement. The measured value of the permeability depends on the dimensions of small samples. The sensitivity of the device is effected by the thickness of the sample. From a sample thickness of about 5 mm (0.200") and a lateral extent of around 2 cm (0.800"), the measurement is independent of the size.
| Specification | FerroPro FP-5 | Ferromaster |
| Range | μr = 1.000 to 5.000 | µ = 1.001 to 1.999 |
| Accuracy | High | Standard |
| Memory / PC Interface | Yes | No |
| Rugged Probe and Probe Cable | Yes | No |
| Measurement Range | µ = 1.001 to 1.999 |
| Resolution | 0.001 |
| Display | LCD 3 1/2 Digits |
| Accuracy of Calibration @ 20 °C | (µ-1) x 5%, reference to NPL calibration standards, can be readjusted |
| Operating Temperature | 32 °F to 122 °F / 0 °C to 50 °C |
| Field Strength at Probe Tip | ~35 kA/m |
| Battery | 9V (PP3, Alkaline) |
| Operation Time with 1 Battery | ~50 hours |
| Unit Dimensions | 6" x 3.2" x 1.3" / 151 x 82 x 33 mm |
| Length and Diameter of Probe | 1.3" x 0.7" / 35 mm x 19 mm |
| Environmental Protection | IP65 |
| Connection Cable Length | 59" / 1.5 m |
| Weight | 0.6 lbs. / 280g |
(Dimensions of the permeability probe in mm (subject to alterations)
| Description | Part # | Saved | Price | Select Option | Add to |
|---|---|---|---|---|---|
|
Magnet Permeability Meter / Ferromaster with Probe, Calibration Standard and Case (Old PN: 7350)(Specify Calibration Standard Range)
Model #
|
MI-LM-3110-Master |
|
Request Pricing | ||
|
Calibration Standard for Ferromaster (Old PN: 7353)(Specify Range)
Model #
|
MI-LM-3170-Master |
|
$335.00 | ||
| Ferromaster Factory Recalibration (shipping not included) | MI-LM-FERRO-CAL |
|
$275.00 | ||