The Fell-41 "Reads" and locates cracks and faults in non metallic Sewer/Drain or Vacuum lines.  The line under test is verified and cleaned with a standard Water Jet.   The Sonde is mounted on to the end of it’s own fiberglass pull cable.  The Sonde is pulled down the line by retracting it with a standard jet hose. The jet hose is removed and the line is plugged. The line is then "surcharged" or filled with water. The Sonde is prepared for use when it is surrounded by water supplied from the jet or from normal service flow.   The Sonde is activated and begins to emit an electrical charge that travels through the water that surrounds it.  The electric winch reel is activated and the sonde begins travel through the pipe.  As the Sonde travels through the pipe the electrical charge that it emits is constantly searching for a break or crack or some other type of defect in the line.  A break or crack lets the electrical charge escape temporarily to earth ground.  Whenever this occurs  the strength of the electrical loss is measured by the FELL system software. This loss can be measured and plotted on a standard Windows XP laptop computer as to the size and length of the crack or defect.  The exact location of these cracks and defects are plainly shown on the screen allowing the technician to pinpoint precisely where the line needs to be repaired. This information can be uploaded to another computer and/or it can be printed out on the spot for verification and analysis and shown to the customer.
The FELL 21 COMPLETE SYSTEM: Consists of 650' Fiberglass Rod mounted on a 12 volt powered winch with Sonde and counter assembly. The system can be provided with all necessary accessories such as Manhole Pulley Guides and auxiliary winch system. Panasonic Tough book computer with software installed and ready.

Basic system $ 29,950

Complete Turnkey system price $43,500

FAST, LOW COST and EASY TO USE

       A quantitative test that eliminates the guesswork from SSES for I/I.
       A quick, accurate and repeatable QA test for both new and rehab projects
       Applicable to non-conductive sewer pipes - laterals, mains interceptors and trunk lines.
       Turns the I/I Rehab budget into "smart money" that returns full payback in a few years

Locates pipe defects within inches
Assessment of pipe defect size
Simple and accurate
Rapid coverage and low cost
Reliable and repeatable
Continuous testing along pipe
Test at any time of the year

Principal of Operation:
Clay, plastic, concrete, reinforced concrete and brick pipes are electrical insulators
--the walls of such pipes have high resistance to electrical current.
--the water in the pipe has low electrical resistance
--the ground has low electrical resistance
--the TOTAL electrical resistance between the electrodes is very high due to the pipe wall.
--a defect in the pipe that is a potential water leak will decrease the pipe wall resistance.
--the current flow in the circuit will increase.
--the size of the current increase is related to the size of the pipe defect
Operation:An electrode is placed in the pipe (sonde)
Another electrode is placed on the surface (metal stake driven into the ground)
The water in the pipe is set at a level that ensures that the pipe is full at the sonde location.
An electric voltage is applied between the electrodes.
The sonde is pulled through the pipe
The current flow between the electrodes is measured every 0.5 inch.
The electrical current increases whenever the sonde reaches a pipe defect

Visit Official Fell website
View Pilot study
 

C.A.Turner Co.,Inc.  6 Marshall St.  Leicester, MA  01524     Tel 800-228-4032   Fax 508-752-5750