Ultra-Stable 2W Loss Length ORL Tester KI23427OLF-InGaAs-APC
A Two-Way Optical Loss Test set (OLTS) that's perfect for medium to ultra high fiber count loss, length and optical return loss testing applications on single mode fiber with an APC connector at triple 1310 / 1490 / 1550 nm. A pair of these compact instruments set new standards of productivity, accuracy and ease of use. The 650 nm VFL is on a separate port.
Each SM fiber needs just one test hook-up and one key press for a complete 2W / bidirectional loss length & ORL test, eliminating administration, training and test errors. Testing is accurate and can take only 5 seconds, direct onto flexible standards-compliant Tier 1 certification reports.
A pair of instruments both display length & bi-directional loss, & ORL each end, in real time, with no need to specify master/slave instruments. A single instrument can also be used as a stand-alone ultra-stable light source & power meter, VFL, ORL meter, or tone generator / detector.
- 25% of the size / weight, 7x the battery life of competitors
- Bidirectional Autotest loss, length & ORL testing on one fiber
- Full-feature optical return loss tester
- Real time Pass / Fail display
- 8,000 fiber memory and USB key file dump
- KITS™ reporting software
- Autotest optical power meter, >25 λ, 1 % accuracy
- Traceable reports: source stability & λ, meter cal & linearity, ORL cal
- 80 hr alkaline battery life
- 3 Year warranty and calibration cycle

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.
KI23427OLF-INGAAS-APC specifications
Modulated output (source) | 270 Hz, 1 kHz, 2 kHz ± 2 %, 12 Multi-Fiber ID tone |
Output wavelength (source) | 1310, 1490, 1550 nm Laser APC, VisiTester APC |
Output power (source) | -7 dBm ±1 dB @ SMF |
Adjust output power (source) | Adjustable over 7 dB in 0.01 dB steps |
Short term stability for 15 min, typical ±2 °C, after warm up, ORL < -25 dB (source) | 0.03 dB (for 1310, 1550 nm), 0.04 dB (for 1490 nm) |
Stability over temperature (source) | 0.2 dB (max) |
Wavelength drift (source) | 0.4 nm per °C (typical for 1310, 1550 nm), 0.1 nm per °C (typical for 1490 nm) |
Wavelength initial tolerance @ 25 °C (source) | 20 nm for 1310, 1550 nm, 6.5 for 1490 nm |
Spectrum width @ FWHM (source) | 3 nm (typical for 1310, 1550 nm), < 1 nm (typical for 1490 nm) |
Reconnection repeatability @ 95% confidence (source) | 0.1 dB |
Length range (2-way Autotest only) | 27 dB |
Length accuracy (2-way Autotest only) | 0.01% ± 4 meters |
Length resolutions | 1 meter (0.000~9.999 Km), 10 meters (10.00~99.99 Km), 100 meters (100.0~127.9 Km) |
Loss range (2-way Autotest) | 44 dB |
Loss repeatability & loss linearity (2-way Autotest) | 0.04 dB |
Loss range (1-way Autotest) | 44 dB |
Loss repeatability & loss linearity (1-way Autotest) | 0.04 dB |
ORL range | 0 ~ >57 dB |
ORL port isolation | > 60 dB |
ORL accuracy | 0.2 dB |
ORL resolution | 0.01 dB (@ 0 ~ 45 dB), 0.1 dB (@ 45 ~ 60 dB) |
VFL wavelength | 650 ± 5 nm |
VFL power | 0 dBm ± 1 dB @ SMF |
VFL laser safety | Class 1, IEC60825-2 |
VFL blink rate (manual) | CW or 2 Hz |
Not what you're looking for? Look for a more suitable part number, or submit a quote request with your technical requirements.
General KI 23400 Handheld Two-Way Loss / Length / ORL Test Set with Warm-Up specifications
Detector type (meter) | InGaAs |
Response wavelength (meter) | 600 ~ 1700 nm |
Calibration wavelengths (meter) | 780, 820, 850, 980, 1270, 1290, 1300, 1310, 1330, 1350, 1370, 1390, 1410, 1430, 1450, 1470, 1490, 1510, 1530, 1550, 1570, 1590, 1610, 1625, 1650 nm |
Accuracy (meter) | 1 % (0.06 dB) |
Mid-range linearity (meter) | 0.04 dB (typical) |
Power range (meter) | +10 ~ -60 dBm (780 ~ 980, 1590 ~ 1650 nm) / +10 ~ -70 dBm (1270 ~ 1650 nm) |
Total uncertainty (meter) | 0.3 dB (max) |
Resolution (meter) | 0.01 dB |
Polarization sensitivity (meter) | < 0.05 dB (typical) |
ID tone detection & Autotest sensitivity (meter) | Up to -50 dBm |
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 |
Calibration validity (ISO17025) | 3 years |
In the box

Low Reflection Terminator, SC/PC OPT703

Low Reflection Terminator, SC/APC OPT704

OPT730-SCP-SCA

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
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