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 density in lbs/ft3 (kg/m3), can be generated in real-time.

A 4-foot diameter pile, 100 feet deep, with eight, 2 inch ID access tubes can be logged is less than 2 hours in normal conditions.  These quick, reliable surveys help Engineers make decisions in the field, saving time and money for the client.

This density tool uses a single detector, which collects formation density data in a spherical radius slightly larger than the source-detector spacing. In comparison to Dual Detector Density, this tool is lightweight, more cost effective, and designed with a thin diameter for use in 2 inch holes. It has the option of being used as a simple natural gamma tool, without bowspring for 2 inch tubes, or with a bowspring as side-wall density.


  • Cement Pile Testing
  • Dam and Foundation Testing
  • In-situ Density
  • Petrophysical Properties
  • Mineral Quality and Delineation
  • Lithology Analysis

Operating Conditions

Borehole Fluid
[X] Water
[X] Mud
[X] Dry

[X] Uncased
[X] PVC Borehole
[X] Steel

[_] Required
[X] Optional

Features & Benefits

  • Real-time Quantitative Density
  • Thin diameter, able to be used in 2 inch access tubes
  • Light weight, easy one person operation
  • More cost effective than other density tools on the market
  • Can collect natural gamma data with same tool
  • Cesium-137 source
  • Operates on any standard wireline (Mono, 4, 7 conductor, or Coax)

Specifications – Metric/English

Specification Metric Imperial
Diameter 31.75 mm 1.25 inch
Length 0.92 m 36.6 inch
Weight 7.4 Kg 12 lbs.
Max. Temp. 70ºC 158ºF
Max. Pressure 200 bar 2900 psi


Gamma Detector: NaI (Tl) crystal 1.27 x 3.8 cm (0.5 x 1.5 inch)
Source: 100 mCurie Cesium 137
Source- Detector Spacing: User Definable


Data Sheet
User Guide

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