C.A.T4 and Genny4: Optional Accessories

Follow Avatar Anthony Caplin
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The Mouse is a small self contained watertight signal transmitter (“Sonde”) which can be located by the C.A.T4 in Genny mode or Avoidance Mode.

Unscrew the housing and insert batteries in the orientation shown by the diagram in the battery compartment.

To check for correct operation, place the Mouse on the ground, set the C.A.T4 to Genny mode and, whilst holding the C.A.T4 in line with the Mouse, check that the signal is being received.

Insert the Mouse into the duct or drain and adjust the C.A.T4 sensitivity to receive the signal.




Smaller ghost signals appear before and behind the main signal position. Locate all three peaks to be sure the largest middle one is identified as the Mouse position.

Rotating the C.A.T4 about its axis to obtain the largest signal puts the C.A.T4 in line with the Mouse and is a good way of identifying the direction of the duct or pipe.


Locating all three peaks


Estimating Mouse depth using the C.A.T4+/eC.A.T4+/ gC.A.T4+

WARNING: Do not use the C.A.T4+, eC.A.T4+ or gC.A.T4+ depth estimation to decide if mechanical digging is appropriate.

Depth estimations are only possible when using the C.A.T4+, eC.A.T4+ or gC.A.T4+ in Genny mode.

CAUTION: Locate the main Mouse signal as previously described. Hold the C.A.T4 vertical and in line with the Mouse. Press and hold the depth button until ‘M’ appears on the display and then release. The depth estimation will be displayed.

NOTE: If the StrikeAlert feature is enabled the alarm will activate at approximately 1.2m when locating a mouse. If this is inconvenient, the StrikeAlert feature can be disabled in the Genny mode by pressing and holding the depth button for the duration of the battery test bleep at switch on.



FlexiTrace is a 50m (164') or 80m (260') flexible conductive rod with a built-in mouse that can be inserted into non-metallic pipes and ducts to allow them to be located at depths of up to 3m (10') FlexiTrace can be inserted into a pipe or duct as small as 12mm (½") internal diameter, and with bends as tight as 250mm. To use as a mouse, connect both transmitter leads to the FlexiTrace lugs. In this mode, only the tip of the FlexiTrace will be locatable. To trace the whole length, connect the red transmitter lead to a FlexiTrace terminal and ground the black lead, either to the earth stake or to an appropriate earthing point.






WARNING: Do not use the supplied Direct Connect leads to connect to live cables. Use the Radiodetection Genny Live Plug Connector or Live Cable Connector. Failure to do so may result in injury or equipment damage.

WARNING: Connection to live power cables should only be undertaken by qualified personnel.



The Live Plug Connector applies the Genny signal to a live domestic power socket and, via the domestic wiring system, to the service and supply cable in the street.

Connect the Live Cable Connector to the Genny4 accessory socket and the mains power socket, then switch the Genny4 and the power socket on.

NOTE: The Live Plug Connector provides protection to 250V AC.


Service and Maintenance

The C.A.T4 and Genny4 are designed to require minimal recalibration. However, as with all safety equipment, it is recommended that they are serviced and have their calibration validated at least once a year using Radiodetection approved test equipment. Radiodetection accepts no responsibility for service, calibration or repairs carried out by non-authorised persons.

To check when the C.A.T4 is next due to be calibrated, squeeze the trigger, then press the depth button until ‘C’ (Configuration) is displayed. The display will now automatically step through the following information: ‘S’ (software version), ‘D’ (day), ‘M’ (month) and ‘Y’ (year).



All C.A.T4 models feature eCert, which provides a thorough test of the C.A.T4 locating circuitry, and supplies a Radiodetection Calibration Certificate when a positive test result is obtained.

NOTE: eCert does not perform a complete functional check or check the mechanical integrity of the unit under test including the operation of the controls and LCD screen.

To run an eCert test, the C.A.T4 should be connected to an internet enabled PC on which the C.A.T Manager software is installed. Additional purchase may be required contact Radiodetection for more details.



Do not mix new and old batteries or different types of batteries, as this may cause them to overheat.


To replace batteries, open the access cover using a screwdriver or coin. Use two LR20 (D-cell) alkaline batteries or equivalent NiMH rechargeable batteries.


To replace batteries, open the access cover using a screwdriver or coin. Use four LR20 (D-cell) alkaline batteries.



Operating temperature range -20˚C to +50˚C (4˚F to 122˚F)
Environmental protection IP54
Depth accuracy Line: ±5% tolerance from 0.1m (4”) to 3m (10ft)
Sonde (“Mouse”): ±5% tolerance from 0.1m (4”) to 7m (23ft)
Horizontal GPS Position Accuracy* 3m CEP (Circular Error Probable)

C.A.T: 2 x Alkaline or NimH D-Cells (LR20)

Genny: 4 x Alkaline D-cells or NimH (LR20)

Unit weight

C.A.T4: 2.3kg (including batteries)

Genny4: 2.7kg (including batteries)


*gC.A.T4 models only.


The C.A.T4 and Genny4 with optional accessories have been designed to locate buried utilities. Do not attempt for other purposes.

C.A.T4 and Genny4 products are manufactured in the U.K. under ISO9001 certified conditions.