Here at Prototek we have been innovating and manufacturing underground locating equipment for over 20 years. Our goal is to engineer products to aid you to be accurate and efficient on the job site.
Featured Products

HTP-15 | 8 KiloHertz Flushable Transmitter
The HTP-15 flushable transmitter transmits using the 8 KiloHertz frequency. It is your go to when locating with our LineFinder 2200 receiver in nonmetallic lines and septic tanks. If you are locating around power lines this powerful highly efficient frequency will greatly reduce interference.
- 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
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.

FD-10 | 512 Hertz DuraSonde Transmitter
With its new and more durable and compact design the FD-10 is perfect for locating in lines as small as 2 inches. The FD-10 transmits using the industry standard 512 Hz frequency for locating in cast iron and nonmetallic lines.
- Stainless Steel head for durability
- Encased in a strong polycarbonate tube
- Watertight
- Brass battery cap and 2 N cell batteries included
- Dropcap available for use with 1/4″ pushrods (sold separately)
- Our Spring Carriers are recommended to help protect your transmitter
All transmitters ship 2-day for the price of ground. Just select ground at check out.

FM-05 | 512 Hertz Mini Snakable Transmitter
For locating in small lines and p-traps
The smallest snakable transmitter in our 512Hz line. This mini transmitter still has the power to get the job done. The FM-05 will help you locate in small cast iron and nonmetallic lines and with the swivel drophead as the battery cap it will allow you to pass through P-traps and tight elbows.
- Battery caddie and 2-357/A76 button cell batteries included
- Drophead is included with a size 12-24 female threaded end
- Easily attaches to a 3/16” push rod
- Replacement dropheads are available for purchase
- Water tight
All transmitters ship 2-day for the price of ground. Just select ground at check out.

Ardy 223 KiloHertz Analog Kit
223 KiloHertz frequency for nonmetallic locating
The Ardy is our original analog receiver it is simple to use and great for locating septic tanks and for use in nonmetallic pipes. It is compatible with our orange ATP-12, 223 KiloHertz flushable transmitters.
The Analog hard case is made of high density Polyethylene for durability. This is a great accessory to help protect your receiver from the elements.
- Simple to use controls allows you to control the amount of signal you see on the meter
- Headphone jack for noisy sites
- Red battery tester button will help you know when its time to change out the batteries
- To calculate depth multiply the distance in inches between your front and back nulls by .7
- To order more ATP-12 flushable transmitters please click on the following link. ATP-12 223 KHz

Ferris 512 Hertz Analog Kit
For cast iron and nonmetallic locating
The Ferris analog receiver is simple to use and great when locating in cast iron, nonmetallic lines and septic tanks. It is compatible with our blue FTP-8 512 Hz flushable transmitter, 512 Hz DuraSonde line of transmitters and most sewer camera transmitters.
The Analog hard case is made of high density Polyethylene for durability. This is a great accessory to help protect your receiver from the elements.
- Simple to use controls allows you to control the amount of signal you see on the meter
- Headphone jack for noisy sites
- Red battery tester button will help you know when its time to change out the batteries
- To calculate depth multiply the distance in inches between your front and back nulls by .7
- To order more FTP-8 flushable transmitters please click on the following link. FTP-8 512 Hz

LineFinder 2000 Receiver | 512 Hertz
Locate 512 Hz with ease
Sleek, easy to use with automatic depth calculator for accuracy +/- 10%
The LF 2000 is our original digital locator. If you are only locating in cast iron and nonmetallic lines with the 512 Hz frequency then this is your receiver.
- Three step screens to pinpoint your transmitter and a fourth screen to provide depth.
- Automatically drops gain to keep the signal at the best level for locating.
- LCD screens come with automatic backlight and LED functions.
- 4 Position switch helps you navigate through the screens with ease.
- Handle vibration helps guide you through the steps to locating 512 Hz sondes with accurate position as well as precise depth.
- Headphone jack is perfect for locating on a noisy site.
- Low battery indicator so you know when it’s time to change out your batteries.
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