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Geonics LTD EM61-MK2A

EM61 detection of ferrous and nonferrous metals

Will the EM61 detect both ferrous and nonferrous metals? Yes! The EM61 does, in fact, respond to both ferrous and non-ferrous metals! Let’s first quickly review how the EM61 detection occurs. The EM61’s transmitter coil carries a current that creates a strong primary magnetic field that has the potential to intercept a metal target. Once the […]

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EM31 vs EM38 Post

What is the difference between the EM31 and EM38?

Compare Geonics EM31 and EM38 Both measure apparent conductivity per meter as well as the inphase ratio of secondary to primary magnetic field in parts per thousand. Their measurement resolution is +/-0.1% of full scale, making their ability to discern targets about the same. Their components and operating controls look fairly similar. Essentially, the EM31 and EM38 work […]

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Static Background Post

When performing the Static Background Test, why does the EM61 response vary so much?

A little variation in the EM61 response may not be problem if looking for large response targets. However, when looking for smaller targets, baseline measurements must have as little variation as possible. So why are your EM61 readings varying more than+/-1.5 mV? Good question! I don’t know. That’s for you to discover. Variances as small as […]

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Geonics Depth

What is the maximum exploration depth of Geonics equipment?

How deep can Geonics equipment explore? That depends on what piece of equipment the user is using. The maximum exploration depth of Geonics equipment that measures ground conductivity and magnetic susceptibility, such as the EM-31, EM-38, and EM-34, is dependent on the selected intercoil spacing and orientation of the coils. In other words, the distance […]

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Convert GPS UTM Post

Geonics EM-38 Continuous Readings With GPS and Convert to UTM

Convert to UTM Geonics’ EM-38 Continuous Readings With GPS configured to output NMEA String $GPGGA. Recording continuous apparent conductivity data with a Geonics EM-38  and converting the GPS to UTM is fairly straight forward. 1) Start EM38Mk2 on the datalogger (Allegro CX or TK6000 are often used). Turn on the data logger and find EM38. […]

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