Product · Borehole Geophysics
Mount Sopris Instruments QL40-ELOG
A multipoint electrical logging probe that simultaneously records 8, 16, 32, and 64-inch normal resistivity along with spontaneous potential (SP) and single-point resistance (SPR) in a single pass.
New Refurbished Absolute Certified Surplus
About the Mount Sopris Instruments QL40-ELOG
By logging four resistivity spacings at once, the QL40-ELOG gives depth investigation at multiple radial distances from the borehole in one run, useful for distinguishing true formation resistivity from near-wellbore invasion effects.
Combined with SP and SPR channels, it is a standard tool for lithology correlation and water-quality assessment in open, fluid-filled boreholes.
| Specification | Value |
|---|---|
| Measurements | 4× normal resistivity (8/16/32/64"), SP, SPR |
| Probe format | Quick Link (QL40) — stackable or standalone |
| Borehole requirement | Open, fluid-filled |
| Output | Digital, real-time |
| Typical use | Lithology correlation, water quality |
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.