Spec Sheet:

Cased-Hole Logging

Capacitance Temperature Flow

Capacitance Temperature Flow

Short combination tool

By combining multiple sensors, the overall tool length is reduced compared to a standard length PLT string. The Capacitance Temperature Flow (CTF) combines three sensors together – capacitance water hold up, temperature and flowmeter – with a single electronics section.


Key Features

  • 3 sensor measurement in a single tool
  • Quantitative downhole fluid hold-up measurement
  • Well-fluid velocity and direction
  • Leak and cross-flow detection
  • Temperature of the surrounding borehole fluid
  • High resolution and fast response
  • Combinable with other GE Ultrawire™ tools
  • Memory or surface read-out operation

Technical Information

Service Name


Length470 mm / 18.5 in
Weight2.45 kg / 5.4 lbs
OD43 mm / 1.688 in
Hold-up range0-45% water hold-up
Hold-up resolution1%
Temp accuracy± 0.56 °C / ± 1 °F
Temp resolution0.003 °C / 0.006 °F
Spinner output10 pulses / rev
Maximum pressure1030 bar / 15 000 psi
Maximum temperature177 °C / 350 °F


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