Downhole Probes

Mount Sopris offers the widest range of slimline downhole probes in the industry. Designed to standup to the harshest borehole environments, our small diameter sondes are also surprisingly lightweight and easy to handle. Most probes come in both stand-alone and stackable versions, saving you time and money. Please check out our standard probes below which are organized by measurement type. Don’t hesitate to Contact Us for assistance in selecting the best tools for your application.

QL40-ELOG – Electrical Resistivity

Description The QL40-ELOG digital probe measures 8, 16, 32 and 64 inch normal resistivity, single point resistance (SPR) and spontaneous potential (SP) simultaneously. Users can log resistivity profiles with different depths of investigation and gain information about...

QL40-IP – Induced Polarization

Description The QL40-IP Induced Polarization probe combines a quadruple spacing normal resistivity tool and dual spaced induced polarization tool to measure the electrical resistivity, spontaneous potential and chargeability of rocks. A high chargeability response is...

QL40-DLL3 – Dual Laterolog

Description The QL40-DLL3 Dual Laterolog tool provides a time multiples dual spacing focused resistivity measurement with two different depths of investigation, Shallow LL3S and Deep LL3D resistivity in Ohm.m. It is characterized by an excellent vertical resolution in...

40GRP – Gamma + Resistivity

Description The 40GRP-1000 combination probe is ideal for slimline, one-pass, hydrogeological studies, lithology work, uranium exploration, and general borehole formation data. The totally digital probe combination measures 16, 64 inch (0.4, 1.6 meter) normal...

40LGR – Gamma + SP + SPR

Description The 40LGR-1000 Gamma, SP, and SPR probe is the most fundamental probe used in hydrogeological studies, lithology work, uranium exploration, and general borehole formation data.  The totally digital probe combination measures single point resistance,...

QL40-GR – Natural Gamma

Description The QL40-GR probe measures the amount of gamma radiation occurring naturally within the formations crossed by a borehole. Gamma rays are produced mainly by isotopes of potassium, thorium, and uranium. The gamma log is widely used in the groundwater and...

QL40-SGR – Spectral Gamma

Description The QL40-SGR probe measures the amount of gamma radiation occurring naturally within the formations crossed by a borehole and counts the number of gamma emissions associated with each energy level. Gamma rays are produced mainly by isotopes of potassium,...

QL40-GR-CCL – Casing Collar Locator

Description The QL40-GR-CCL is a combination of a natural gamma ray (GR) assembly and casing collar locator (CCL). The natural gamma ray (GR) module measures the amount of gamma radiations occurring naturally within the formations crossed by a borehole.  A...

2GHF-1000 – Triple Gamma

Description The 2GHF-1000 Triple Gamma Geiger probe was designed specifically for use in Uranium Exploration and Production. It measures natural gamma radiation from a Sodium Iodide scintillation crystal and a ZP1320 High-flux Geiger-Muller tube pair with...

2LSA-1000 – Large Crystal Spectral Gamma

Description The 2LSA-1000 probe measures the amount of gamma radiation occurring naturally within the formations crossed by a borehole and counts the number of gamma emissions associated with each energy level. Gamma rays are produced mainly by isotopes of potassium,...

32GR – Slim Natural Gamma

Description The 32GR probe is a new generation slim gamma logging tool from Mount Sopris Instruments. It is all digital with newly upgraded electronics, has a slim 32 mm (1.25″) diameter, and measures the amount of gamma radiation occurring naturally within the...

19GR – Nano Gamma

                                                                                                                              Courtesy of Geosyntec Consultants Description The 19GR Nano Gamma is the slimmest downhole gamma probe in existence today. At only 19.05 mm...

QL40-ABI-2G – Acoustic Televiewer

Description The QL40-ABI-2G is the latest generation of acoustic televiewers based on 20 years of experience and market leadership. The new system consists of a completely redesigned acoustic sensor and new electronics. The acoustic borehole imager records a...

QL40-OBI-2G – Optical Televiewer

The New 2nd Generation Optical Televiewer is Here!   Description The QL40-OBI-2G and OBI40GR-2G are the new generation of Optical Borehole Imagers. The new televiewer comprises a completely redesigned optical assembly with new electronics. It implements a high...

QL40-FWS – Full Waveform Sonic

Description The QL40-FWS Full Waveform Sonic tool is used extensively in the groundwater, mining, and geotechnical industries. Sonic logs are widely employed, often in combination with other logs, to provide porosity, permeability, and geo-mechanical properties. This...

2SAA-1000-F – Modular Full Waveform Sonic

Description The 2SAA-1000-F Modular Full Waveform Sonic tool is used extensively in the groundwater, mining, and geotechnical industries. Sonic logs are widely employed, often in combination with other logs, to provide porosity, permeability, and geo-mechanical...

QL40-FTC – Fluid Temperature + Conductivity

Description The QL40-FTC probe provides borehole temperature and fluid conductivity measurements.  The standard temperature log, based on a thermister, is designed to provide a measure of the ambient geothermal gradient and is helpful to detect anomalies caused by...

QL40-SFM – Spinner Flowmeter

Description The QL40-SFM Spinner Flowmeter probe measures impeller rotation caused by groundwater flow in the borehole. It uses a magnetically coupled pick-up which drives a low friction, high resolution encoder located inside the lower pressure housing. The encoder...

QL40-OCEAN – Water Quality

Description The QL40-OCEAN Idronaut Ocean Seven 303 probe combines a multi-parameter sensing unit manufactured by Idronaut srl, Brugherio, ITALY. This water quality probe is specifically designed for groundwater and environmental investigations. It uses reliable,...

HFP-2293 – Heat Pulse Flowmeter

Description The HFP-2293 Heat Pulse Flowmeter is a unique flowmeter tool designed to measure low flow rates in the borehole environment.  It will also give the direction of the flow of fluid vertically. To detect these low flow rates, measurements must be made while...

BHFS – Fluid Sampler

Description The BHFS one liter Borehole Fluid Sampler Probe collects fluid samples at desired depths for surface or laboratory analysis. The probe can be lowered to a known depth where the sample chamber is opened by applying the proper voltage polarity to the cable...

QL40-CAL – 3-Arm Caliper

Description The QL40-CAL Caliper probe records a single continuous borehole diameter log by means of three mechanically coupled arms in contact with the borehole wall. The 3 arm caliper measurement is a useful first log to determine the borehole condition before...

QL40-IND – Dual Induction

Description The QL40-IND Dual Focused Induction probe provides two simultaneous conductivity logs, corresponding to “Medium” and “Deep” radii of investigation into the borehole. The two depths of penetration are useful in porous, permeable formations where...

QL40-HM – Magnetic Susceptibility

Description The QL40-HM borehole magnetic susceptibility tool is typically used in mining, geotechnical, and lithology applications. All electronic circuitry resides in a high strength non-magnetic enclosure. The operating frequency is chosen to be sufficiently low to...

QL40-DEV – Borehole Deviation

Description The QL40-DEV Borehole Deviation probe measures the direction relative to magnetic north, inclination and trajectory of the borehole. Measurements are based on the “Applied Physics Systems” 544 orientation sensor containing both a 3-axis fluxgate...

QL40-DEN – Dual Density + Caliper

Description The QL40-DEN Compensated Density & Caliper probe is a versatile wireline tool that can be used in a wide variety of logging applications. Measurements include SSD (short-spaced density), LSD (long-spaced density), Compensated density (dual density),...

QL40-NEU – Neutron Thermal Neutron

Description The QL40-NEU neutron probe utilizes a He-3 thermal neutron detector. It measures Neutron porosity in counts per second, which can be directly related to the porosity of the formation. The probe has been carefully designed to maximize the detector...

32DEN 4-Pi – Gamma-Gamma Density

Description The 32DEN 4-Pi Gamma-Gamma Density tool can be used to collect quantitative (when calibrated) density information of the material surrounding the borehole. It is most commonly used for geotechnical assessment of cement pile access tubes.  Plots which graph...

QL40-nGEN – Neutron Generator

Description Mount Sopris Instrument Company together with Starfire Industries LLC are developing a new neutron probe that eliminates the use of radioactive materials for neutron production. This innovative solution will provide a welcome addition for well loggers and...

QL40-SIP – Spectral Induced Polarization

Description Mount Sopris Instrument Company, together with Ontash & Ermac and Rutgers University, are developing a new borehole probe based on Spectral Induced Polarization (SIP) technology. This SIP probe is directly relevant for subsurface investigations in...