LD-9 | 16 Hz DuraSonde Transmitter


The LD-9 is our smaller of the 16 Hz line of durasonde transmitters. LD-9 has a new more durable design and stronger signal. If you are going to locate in ductile iron or steel pipes this transmitter will do the job.

Replaces our SB-9

  • Best used when locating in Steel or Ductile Iron
  • Stainless Steel head for durability
  • Encased in a strong polycarbonate tube
  • Water tight
  • Brass battery cap and 3 AAA alkaline batteries included

Frequency: 16 Hz
Dimensions: 1” W x 7” L
Line size: 4 inches and up
Range: 9 feet in ductile iron or steel
Range is determined under best conditions using a Prototek Receiver
Signal tone: Continuous
Battery: 3 AAA alkaline batteries

Q: Can I use this transmitter to locate in cast iron?
A: Yes, but we would recommend our FD series of transmitters for cast iron locating.

Q: Why am I not getting full range anymore?
A: As with most electronics the stronger your battery life the more performance you will get out of it. So we recommend using fresh batteries for every locate. This also applies to your 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: How do most people push this transmitter down the line?
A: Most of our customers heavily tape them to the side of their push rods. But you can also attach them to your camera or sewer machine. Some customers go as far as getting some PVC pipe and two encaps. This would be like a makeshift spring carrier and is a great way to protect your transmitter.


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Additional information

Weight 8 lbs
Dimensions 20 × 5 × 5 in