Polarity indicator and remanence with needle calibrated in Gauss. Range + / – 20 Gauss.
Western Instruments manufactures 4 models of Disposable Field Indicators, which provide readings in Gauss;
1. W-FI-10 – Intended to be used for Demagnetization and are calibrated during manufacture in a Homogeneous Field (Helmholtz Coil +/- 10 Gauss).
2. W-FI-20 – Intended to check residual fields, and are calibrated during manufacture for a Homogeneous Field (Helmholtz Coil +/- 20 Gauss).
3. W-FI-50 – Intended to check strong residual fields, and are calibrated during manufacture for a Homogeneous Field (Helmholtz Coil +/- 50 Gauss).
4. W-FI-100 – Intended to check very strong residual fields, and are calibrated during manufacture for a Homogeneous Field (Helmholtz Coil +/- 100 Gauss).
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