Product · Borehole Geophysics
Mount Sopris Instruments 19GR
A nano-diameter natural gamma probe measuring just 19.05mm (0.75") across — among the slimmest gamma logging tools available — built for small-diameter monitoring wells and geotechnical boreholes.
New Refurbished Absolute Certified Surplus
About the Mount Sopris Instruments 19GR
Where standard QL40-class probes (around 40mm) won't fit, the 19GR lets natural-gamma lithology logging extend into narrow-diameter piezometers, geotechnical boreholes, and other tight-access wells.
It shares the same basic gamma-detection principle as larger probes, trading some sensitivity for the ability to reach small-diameter installations that would otherwise go unlogged.
| Specification | Value |
|---|---|
| Measurement | Natural gamma radiation |
| Probe diameter | 19.05 mm (0.75 in) |
| Typical use | Small-diameter monitoring wells, geotechnical boreholes |
| Borehole type | Open or cased |
| Positioning | Slimmest gamma probe class in the range |
Available across all four PartnerGeometrics condition tiers — New, Refurbished, Absolute Certified, and Surplus. See our condition tier guide for details on what each tier includes.