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EnglishWhat Is Severn Engineering Instruments LLC and What Does severnengineering.com Offer?
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Severn Engineering Instruments LLC is the company behind The Severn Gage, a non-destructive inspection instrument offered in two models: a Low Mu Permeability Indicator and a Ferrite Indicator. The site presents these as simple, rugged tools for laboratory, shop, and field use. If you need to check the magnetic permeability of weakly magnetic materials or the ferrite content of stainless steel welds, this is the product line the site describes.
The two Severn Gage models
The Severn Gage is not a single-purpose instrument. The site splits it into two configurations, each aimed at a different measurement problem.
Low Mu Permeability Indicator
This model measures the magnetic permeability of weakly magnetic materials, with stainless steel given as the example. Permeability here means how readily a material can be magnetized. A low-mu indicator is therefore the relevant tool when the question is how weakly magnetic a part or material actually is, rather than how much ferrite it contains.
Ferrite Indicator
This model measures the ferrite content of a material, with stainless steel weld as the example. The site notes it is used extensively to measure the soundness of welds to stainless steel pipes in nuclear power plants and food handling equipment.
The Ferrite Indicator is available in two calibration types:
- Percent Ferrite
- Ferrite Number
That distinction matters because the two scales are not interchangeable. Which one you need depends on the specification or standard your inspection is being checked against, so confirm the required scale before ordering.
How to tell which model fits your task
| Your question | Model to look at |
|---|---|
| How magnetizable is this weakly magnetic material (e.g., stainless steel)? | Low Mu Permeability Indicator |
| How much ferrite is in this stainless steel weld? | Ferrite Indicator |
| I need a percent ferrite reading | Ferrite Indicator, Percent Ferrite calibration |
| I need a ferrite number reading | Ferrite Indicator, Ferrite Number calibration |
If your work involves weld soundness on stainless steel piping in nuclear or food-handling settings, the site's own description points to the Ferrite Indicator. If your concern is the permeability of the base material itself, the Low Mu Permeability Indicator is the matching model.
Where it is meant to be used
The site describes the instrument as suitable for laboratory, shop, and field use, and characterizes it as simple, rugged, and non-destructive. That combination is the practical selling point: the same gage is positioned for controlled bench work and for on-site inspection, without a destructive test.
What the site does not state
The available page material does not list prices, ordering or payment details, technical specifications, calibration procedures, or login requirements. Treat those as unconfirmed rather than assuming the product is free, openly purchasable, or usable without an account. If you need pricing, dimensions, accuracy figures, or calibration services, those questions have to be directed to the company rather than answered from the page content summarized here.