Resistivity Ultra Minires40


An updated version of the Ultra Minires now offers 40 milliAmps of transmitted current for those longer a-spacings that are becoming more popular. Along with this increase in current is a slight increase in voltage as well - 800 volts peak to peak regardless of load. With a newly designed internal lithium rechargeable battery pack, this Minres40 is easy to use.

The Ultra MiniRes40 is likely the most accurate resistivity and IP field instrument available today. This 2.5 Hz model is a great all-around instrument for grounding and mining reconaissance surveys. At 2.5 Hz, it takes a little longer for the readings (because of the lower frequency rate) but is capable of larger "a" spacings. Recent comparison tests with an AGI SuperSting show comparable data out to an a-spacing of 2000 feet! The accuracy and repeatability have made the Minires a favorite for those working soil resistivity surveys for grounding of power and pipeline protection systems.

Power Source: Rechargeable Lithium Ion batteries
Input Resistance: 200 Megohms
Transmitter current: 40.00 milliamps
Resistance resolution: 0.1 milliOhm= 100 microOhms
IP resolution: 0.01 milliOhm

Do you need wire for Wenner Array soundings?

For max a-spacings up to 300': Wenner 300

For max a-spacings greater than 300': Wenner over 300


25 x 20 x 9 inches


24 lbs

Rental per day





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