EMF News

HP-01 magnetometer; time varying & static magnetic fields from 10µT to 10T

The HP-01 magnetometer provides a straightforward means of taking safety measurements in workplaces where personnel are at risk from the effects of static or time-varying magnetic fields. Manufactured by Narda Safety Test Solutions, the device features an extremely wide measurement range of 10µT to 10T, while built-in orthogonally mounted Hall-effect sensors allow the field to be determined with a single measurement in any direction. The HP-01 is ideal for taking measurements to ensure compliance with the Control of Electromagnetic Fields at Work Regulations 2016, which are the transposition into UK law of EU Directive 2013/35/EU.

The magnetometer will help to avoid hazards due to the indirect effects of strong magnetic fields, such as projectile risk or interference with active implanted or body-worn medical devices such as pacemakers and infusion pumps. Typical areas where strong magnetic fields may be encountered include medical applications such as magnetic resonance imaging, DC motors in electric trains, and industrial processes involving the use of large magnetic stirrers, strong permanent magnets or electrolysis.

Capable of measuring time-varying fields with frequencies up to 1000Hz, the HP-01 incorporates a powerful FFT analyser that allows detailed, highly accurate signal analysis in both time and frequency domains. Results can be displayed as a live spectrum or showing the variation in the spectrum over time graphically as either a waterfall diagram or a spectrogram. Since the limit values in safety standards are usually specified for static fields and time-varying fields with frequencies up to 1Hz, the magnetometer facilitates compliance measurements by the inclusion of a built-in finite impulse response (FIR) filter that captures only frequency components in the 0Hz to 1Hz range. The instrument is operated using the HP01-TS software supplied, which is compatible with any PC running Windows 7 or later. Also included is a 10m-long fibre-optic cable with USB adapter, which connects the HP-01 to the PC, enabling it to be controlled from a safe distance; this can be increased with an optional 50m-long fibre-optic cable if required. Powered by rechargeable Li-ion batteries with a typical operating time of 6 hours, the HP-01 magnetometer weighs just 100g, has overall dimensions of 43 (D) x 200 (L) mm and can be used in ambient temperatures ranging from -20 to 55°C.


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