Bidirectional Loss, Length, ORL Testers KI 23400 & 27400 Series
A Bidirectional Optical Loss Test set (OLTS) with optional length & ORL measurement that's perfect for ultra-high fiber count Tier 1 loss & length testing applications. A pair of compact instruments set new standards of productivity, accuracy, and ease of use.
Each fiber needs just one test hook-up and one key press for a complete bidirectional loss, length and ORL test, for both single-mode and multimode fiber, so the same test method can be used for all fibers in a network, eliminating administration, training, and test errors. Testing is accurate and can take only 5 seconds, direct onto a final standards compliant certification report. The Visitester option lights up the far end of the fiber to be tested.
A pair of testers both display length as well as bi-directional loss and optical return loss each end, in one hook-up, in real time, with no need to specify master/slave instruments. A single instrument can also be used as a stand-alone light source & power meter, full-feature ORL meter, VFL, or tone generator / detector.
KI234x series instruments feature the optical return loss (ORL) test option, as well as having an ultra-stable source with zero warm-up time to specification.
- 25% of the size / weight, 7x the battery life of competitors
- SM, MM, quad & other wavelengths
- Bidirectional Autotest loss, ORL & length testing on one fiber
- Full-feature optical return loss tester
- Real time Pass / Fail display
- 8,000 fiber memory and USB Interface
- KITS™ reporting software
- Autotest power meter
- 1 % power accuracy & 24 calibrated λ, ISO 17025 traceable
- Full QA & test reports for source stability / λ, & power meter linearity
- 80 hr alkaline battery life
- 3 Year warranty and calibration cycle
- EF compliant multimode sources
Please enquire for other configurations to match your needs.

Zero warm-up laser (KI2300, KI2400, KI23400 only)
Instant high-accuracy testing. Unlike other sources, Zero Warm-Up sources are in-spec & stabilized in seconds.

Interchangeable connectors
Use a single tester for: SC, LC, MPO, FC, HFBR, & other connectors - including universal & duplex options.

One-touch AutoTest
Smart communication makes sure you always get a full, complete, and consistent test result.

Real-time reporting software
Excel-based instrument connectivity for comprehensive reporting (against standards) and real-time data logging.

ILAC/NATA ISO 17025 optical calibration
Internationally recognised traceable optical calibration to ISO17025

Genuine 3 year calibration validity
Genuine 3 Year optical power meter re-calibration validity

Total uncertainty specification
Our unique specifications cover accuracy in real world use - over all power levels, temperatures, connector and fiber types.

Multimode test standard compliance
Kingfisher LED sources meet Encircled Flux and CPR requirements straight out of the box.
General KI 23400 & 27400 Handheld Two-Way Loss / Length / ORL Test Set specifications
For more detailed specifications, please select a specific part number from the parts & stock tab.
Accuracy (meter) | 1 % (0.06 dB) |
Calibration validity (ISO17025) | 3 years |
Resolution (meter) | 0.01 dB |
Polarization sensitivity (meter) | < 0.05 dB (typical) |
Autotest | 1-way: compatible with other KI23400 & KI27400 models / 2-way: compatible with identical model only |
Tone detection (meter) | 150 ~ 9999 Hz ± 1 % |
USB interfaces | USB-micro for power & software / USB-A for memory key |
Software | KITS (free download) |
Power | Battery / External power via USB |
Battery life | Laser/LED source: 80 hours (typical) in Autotest, Power Meter: 1000 hours (typical) |
Battery type | 2x AA (LR6) Alkaline / 2x AA NiMH AA (rechargeable via USB) |
Auto off | Selectable |
Display | 74 mm x 55 mm high contrast LCD |
Case | Polycarbonate (body) / rubber (edges & corners), moisture resistance, 1-meter drop tested |
Memory | For 8,000 fibers / Unlimited on USB |
Size | 190 mm x 105 mm x 35 mm |
Unit weight | 0.42 kg |
Shipping weight | 1.5 Kg |
Operating / storage temperature | -15 to 55 °C / -25 to 70 °C |
Relative humidity | 0 ~ 95 % |
Warranty | 3 years |
In the box

SC Through Connector OPT046

Hybrid LC Connector Adaptor OPT076

Hybrid ST Connector Adaptor OPT040

Canvas Pouch for KI2000 Series Instruments OPT149

USB Cable (Micro)

Instrument User Manual

Quality Assurance Certificate

Calibration Certificate ILAC/NATA Compliant
Optional accessories

Hybrid FC Connector Adaptor OPT051

Hybrid Universal 2.5 mm Connector Adaptor OPT081

Hybrid Universal 1.25 mm Connector Adaptor OPT084

Hybrid Universal 1.25 mm Connector Adaptor OPT085

Hybrid MU Connector Adaptor OPT080

Hybrid LC / F3000 Connector Adaptor OPT072

Hybrid E2000 Connector Adaptor OPT060

Hybrid E2000 Connector Adaptor Green OPT060G

Hybrid LSA-DIN47256 AVIM Connector Adaptor OPT071

Hybrid POF Multi-Connector Adaptor OPT077

Hybrid HFBR Connector Adaptor OPT078

Hybrid SMA Connector Adaptor OPT082

Semi-Rigid Carry Case for Test Kits OPT154B

Semi-Rigid Carry Case for Test Kits OPT153-CASE
More Accessories...
Part Number | Description + Applications | MSRP * | |
---|---|---|---|
KI27424-GE | 850-1300 nm, 1310-1550 nm, Ge |
USD $5775.66
|
Add to Enquiry |
KI27424-GE-APC | 850-1300 nm, 1310-1550 nm APC, Ge |
USD $5778.74
In stock
|
Add to Enquiry |
KI27424L-GE | Length, 850-1300 nm, 1310-1550 nm, Ge |
USD $6610.18
|
Add to Enquiry |
KI27424L-GE-APC | Length, 850-1300 nm, 1310-1550 nm APC, Ge |
USD $6611.26
|
Add to Enquiry |
KI23424OL-GE-APC | ORL Length, 850-1300 nm APC, 1310-1550 nm APC, Ge |
USD $7424.71
|
Add to Enquiry |
KI27403-GE | 850-1300 nm, Ge |
USD $3849.80
|
Add to Enquiry |
KI27403LV-GE | Length VisiTester, 850-1300 nm, Ge |
USD $4125.29
|
Add to Enquiry |
KI23403OLV-GE-APC | ORL Length VisiTester, 850-1300 nm APC, Ge |
USD $4399.84
In stock
|
Add to Enquiry |
KI23403OLV-GE-APC-50U | ORL Length VisiTester, 850-1300 nm APC, 50 um, Ge |
USD $4399.93
|
Add to Enquiry |
KI27422-INGAAS | 1310-1550 nm, InGaAs |
USD $4674.97
|
Add to Enquiry |
KI27422-INGAAS-APC | 1310-1550 nm APC, InGaAs |
USD $4677.42
|
Add to Enquiry |
KI27422LV-INGAAS | Length VisiTester, 1310-1550 nm, InGaAs |
USD $5226.42
|
Add to Enquiry |
KI27422LV-INGAAS-APC | Length VisiTester, 1310-1550 nm, InGaAs, APC |
USD $5227.26
|
Add to Enquiry |
KI23422OLV-INGAAS | ORL Length VisiTester, 1310-1550 nm U/S, InGaAs |
USD $5499.49
|
Add to Enquiry |
KI23422OLF-INGAAS-APC | ORL Length VFL,1310-1550 nm U/S InGaAs, APC |
USD $5500.05
|
Add to Enquiry |
KI27427-INGAAS-APC | 1310-1490-1550 nm APC, InGaAs |
USD $4813.16
|
Add to Enquiry |
KI27427LV-INGAAS-APC | Length VisiTester, 1310-1490-1550 nm APC, InGaAs |
USD $5363.73
|
Add to Enquiry |
KI23427OLF-INGAAS-APC | ORL Length VFL,1310-1490-1550 nm U/S APC, InGaAs |
USD $5637.22
|
Add to Enquiry |
KI27410-INGAAS-APC | 1310-1550-1625 nm APC, InGaAs |
USD $5142.51
|
Add to Enquiry |
KI27410LV-INGAAS-APC | Length VisiTester, 1310-1550-1625 nm APC, InGaAs |
USD $5693.28
In stock
|
Add to Enquiry |
KI23410OLF-INGAAS-APC | ORL Length VFL,1310-1550-1625 nm U/S APC, InGaAs |
USD $5967.47
|
Add to Enquiry |
*
This product is designed, made, and calibrated in Australia.
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Fill out our quote request form with as much detail as you can, and we'll help you get your test needs sorted.
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