Optical Cable Identifier K-200
Finds the one cable you want inside a manhole or duct full of identical ones: tap the cable, and the K-200 turns the knock into a tone and a bar reading — nothing is cut, bent or frozen.
Typical work: Picking the target cable out of a crowded manhole, duct or tunnel run before cutting or splicing; Verifying cable identity where records are wrong or labels are missing; Aerial, conduit and buried routes where several operators' cables share the path; Pre-work confirmation on live cables that cannot be interrupted for identification.
Get a Quote WhatsApp UsNeutral stock in small lots, or private label made to your requirements. Prices on request — EXW factory pricing.
K-200 key features
- Non-invasive identification: the photo-elastic effect turns a gentle tap on the target cable into audio and visual signals — the fiber is never cut, bent or frozen, and live traffic on it is untouched
- Two reaches: 40 km and 100 km versions, working over a single fiber at 1550 nm, with no initial blind zone
- Reads by ear and by eye: the sound tracks how hard the cable is knocked, while the screen shows a bar chart or ECG trace — usable in a noisy street cabinet or a quiet plant room
- Works with PC, APC or cut fiber ends, and in manholes, tunnels, conduits and aerial spans alike
- 5.6-inch touch screen plus buttons, ten hours or more on the built-in lithium battery, 1.5 kg complete
K-200 specifications
| Test method | Single fiber |
|---|---|
| Wavelength | 1550 nm |
| Fiber type | Single-mode |
| Maximum test distance | 40 km or 100 km (by version) |
| Unidirectional fiber loss | 10 dB (40 km version); 30 dB (100 km version) |
| Initial blind zone | None |
| Fiber-end return loss requirement | ≤40 dB (40 km version); ≤20 dB (100 km version) |
| SNR | ≥25 dB |
| Optic connector | FC/APC |
| Display | 5.6 in LCD touch screen |
| Input | Touch screen + buttons |
| Output | Visual: bar chart or ECG display; Audio: sound tracking the knock intensity |
| Battery | Lithium 7.4 V, 10.4 Ah — ≥10 h continuous work |
| Power consumption | <6 W |
| Power supply | DC 12 V / 3 A |
| Dimensions | 65 × 150 × 235 mm |
| Weight | 1.5 kg (including battery) |
| Working temperature | 0 °C to +45 °C |
| Storage temperature | -20 °C to +55 °C |
How tap-and-listen cable identification works
Records lie and labels fall off; a duct can hold a dozen cables that all look the same. The old ways of proving which is which — cutting, bending or freezing the fiber — interrupt service and can damage the cable. The K-200 works differently: a coherent 1550 nm signal is launched into the fiber at one end, and when the cable is tapped, the mechanical disturbance changes the light through the photo-elastic effect. The instrument reads that disturbance and plays it back as sound and as a bar or ECG trace.
In practice one technician connects the identifier at the accessible end and a second walks the route, tapping each candidate cable. On the wrong cables the screen stays flat and the earpiece stays silent; on the target cable every tap answers back, louder the harder the knock. Because nothing about the fiber is disturbed, the method works on live cables — even while the fiber is under cut or splicing conditions — and the identification holds over 40 km or 100 km of route depending on the version.
Where the K-200 works
Picking the target cable out of a crowded manhole, duct or tunnel run before cutting or splicing
Part of the Fiber Test Equipment range — see the specifications above for the figures that matter on this work.
Verifying cable identity where records are wrong or labels are missing
Part of the Fiber Test Equipment range — see the specifications above for the figures that matter on this work.
Aerial, conduit and buried routes where several operators' cables share the path
Part of the Fiber Test Equipment range — see the specifications above for the figures that matter on this work.
Pre-work confirmation on live cables that cannot be interrupted for identification
Part of the Fiber Test Equipment range — see the specifications above for the figures that matter on this work.
K-200 components
- One K-200 optical cable identifier (version as ordered)
- Soft carry bag
- Earphones
- DC power adapter
Documents for this model
Product Catalog 2026 — this model appears in our full-range catalog (PDF), published in the Downloads center.
User manual — if you need the manual for this model now, ask via the inquiry form below or on WhatsApp and we will send the available documents with your quote.
More fiber test equipment
Questions about the K-200
Can the K-200 carry our own brand?
Private labeling is made to your requirements and confirmed per order — labels with your logo, part numbers and barcodes on the tools, the inner boxes and the outer cartons, ready for your warehouse. The products most often labeled are the K-35 cleaver, the KS-1 Kevlar shears and the K-870 stripper.
Can we order a small lot, unbranded?
Yes. Neutral stock is held for the core range: small lots are welcome, you can mix models in one shipment, and restock as you sell. Prices are on request — EXW factory pricing.
Ask for a quote — K-200
Tell us the quantity, and whether you want it neutral or with your brand on it.