Mid-Range Push-Rod & Camera Sondes
Prototek’s Mid-Range Sondes cover the everyday locates that sit between the compact tight-space sondes and the deep long-range units. The family spans all three industry-standard frequencies so you can match the sonde to the pipe material and the depth in front of you.
The FD-20 is a 512 Hz sonde that reads roughly 14 ft through cast iron and 20 ft in non-metallic pipe — the go-to for push rods and sewer cameras. The HD-40 is an 8 kHz multi-frequency sonde reaching ~21 ft in non-metallic lines, and the LD-9 runs at 16 Hz to push a signal through ductile (~9 ft) and steel (~5 ft) pipe where higher frequencies can’t.
The FD-20 and HD-40 share a compact 3/4″ x 4″ body on a single AAA cell; the larger LD-9 (1″ x 7″, 3 x AAA) suits 4″ lines and up and rides equally well on a push rod or a crawler.
| FD-20 | 512 Hz, 512 Hz Sonde receiver |
|---|---|
| HD-40 | 8 kHz, Multi Frequency Sonde receiver |
| LD-9 | 16 Hz, Multi Frequency Sonde receiver |
| FD-20 | ~14 ft in cast iron, ~20 ft in non-metallic |
|---|---|
| HD-40 | ~21 ft in non-metallic (not metallic-compatible) |
| LD-9 | ~9 ft ductile / ~5 ft steel, ~12 ft non-metallic |
| FD-20 | 3/4" x 4" L, 3.3 oz, lines 3" and up |
|---|---|
| HD-40 | 3/4" x 4" L, 3.3 oz, lines 3" and up |
| LD-9 | 1" x 7" L, 11.7 oz, lines 4" and up |
| FD-20 / HD-40 | 1 AAA — push rod or sewer camera |
|---|---|
| LD-9 | 3 AAA — push rod or crawler |
Interested in the Mid-Range Sonde?
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