FTP-8 | 512 Hertz Flushable Transmitter


Get a 12.5% discount on flushable transmitters when you buy 20 or more
All flushable transmitters ship FedEx 2-day for the price of Ground. Just select Ground shipping at checkout. 

The FTP-8 flushable transmitter works in cast iron and nonmetallic lines along with septic tanks. The flushable transmitter uses the 512 Hz frequency and will work with our Digital LineFinder series along with the Ferris analog receiver.

  • Black On/Off push button
  • Floats for easy retrieval
  • Flashing LED indicates that the sonde is transmitting
  • Red LED will come on to indicate when the battery is no longer good
  • Batteries are not replaceable
  • Eyelet for easy attachment to a fishing line

Frequency: 512 Hz
Dimensions: 2-1/4” L x 1-3/16” W x 1” H
Line size: 3 inches and up
Range: 8 feet in cast iron
12 feet in nonmetallic
Range is determined under best conditions using a Prototek Receiver
Signal tone: Continuous
Battery: 5 hours
On/Off: Push Button
Compatible with: Any 512 Hz Receiver.  (Will not work with the Ardy receiver.)


Q: I am using a receiver other than Prototek and I am not getting the range that you advertise on your website. What is the deal?
A: Our receivers are very sensitive, they tend to pick up the signals a little better than others. All our ranges posted on our website are determined with our receivers. We can't guarantee what you will get with other brands of receivers.

Q: Will the FTP-8 work in cast iron?
A: Yes

Q: Can I use the flushable transmitters on the end of a sewer machine or push rod?
A: We do not recommend it. Using the flushable transmitters in this way will void any warranty. We do recommend many of our other DuraSonde transmitters along with a spring carrier for this type of use.

Q: Do the flushable transmitters float?
A: Yes they do.

Q: What receiver do you recommend for use with the FTP-8’s?
A: We recommend the Ferris Analog Receiver and both of our LineFinder digital receivers. It just depends on how much you want to spend and what type of locating you are doing.

Q: How do I calculate depth?
A: To calculate depth you will take the distance between your front and back nulls and then multiple by .7.  An example would be if you measured 50 inches between your front and back nulls then you would multiply 50 x .7 = 35 inches.

Q: Do the flushable transmitters fit in a spring carrier?
A: No. They are too wide. Our FD-10, FD-20 and HD-40 DuraSondes fit in all our spring carriers.


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Additional information

Weight .08 lbs
Dimensions 1 × 1 × 1 in