Ultra-Stable Two-Way Loss Length ORL Tester KI23424OL-InGaAs-APC
A Quad Two-Way Optical Loss Test set / OLTS fiber tester that's perfect for medium to ultra high fiber count loss, length & optical return loss testing applications on both multimode and single mode fiber with APC connectors on both ports at 850 / 1330nm 1310/1550 nm. A pair of these compact SM & MM instruments set new standards of productivity, ultra-stable source accuracy and ease of use. A multimode APC connector on this model is required for reliable ORL test performance.
Each fiber needs just one test hook-up and one key press for a complete bidirectional loss, length & ORL test, and the same test method is used for both multimode and single mode fiber, eliminating administration, training and test errors. Testing is accurate and can take only 5 seconds, direct onto flexible standards-compliant Tier 1 certification reports.
The optical fiber length measurement feature is accurate, integrated with the other measurements, and requires only one fiber to be hooked up.
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 OLTS instrument can also be used as a stand-alone ultra-stable light source, power meter, 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
- EF compliant multimode sources

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.
KI23424OL-INGAAS-APC specifications
Output wavelength (source) | Port 1: 1310, 1550 nm Laser APC / Port 3: 850, 1300 nm LED APC |
Output power (source) | -3 dBm ±1 dB (@ 9/125 µm for 1310, 1550 m) / -23 dBm ±1 dB (@ 62.5/125 µm for 850, 1300 nm) |
Adjust output power (source) | Adjustable over 7 dB in 0.01 dB steps (for 1310, 1550 nm) / Fixed (for 850, 1300 nm) |
Short term stability for 15 min, typical ±2 °C, after warm up, ORL < -25 dB (source) | 0.03 dB (for 1310, 1550 nm) / 0.01 dB (for 850, 1300 nm) |
Stability over temperature (source) | 0.2 dB (max for 1310, 1550 nm) / 0.35 dB (max for 850, 1300 nm) |
Wavelength initial tolerance @ 25 °C (source) | 20 nm (for 1310, 1550 nm) |
Wavelength drift (source) | 0.4 nm per °C (typical for 1310, 1550 nm) / 0.4 nm per °C (typical for 850, 1300 nm) |
Mode controlled (source) | 850, 1300 nm (50/125µm compliant: IEC 61280-4-1 {Ed.1.0}, TIA 526-14A & TIA TSB-178) |
Spectrum width @ FWHM (source) | 3 nm (typical for 1310, 1550 nm) |
Reconnection repeatability @ 95% confidence (source) | 0.1 dB (for 1310, 1550 nm Laser) / 0.05 dB (for 850, 1300 nm LED) |
Length range (2-way Autotest only) | 6 dB @ 62.5 µm (for 850, 1300 nm) / 30 dB (for 1310, 1550 nm) |
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) | 27 dB @ 62.5 µm (for 850, 1300 nm) / 47 dB (for 1310, 1550 nm) |
Loss repeatability & loss linearity (2-way Autotest) | 0.06 dB (for 850, 1300 nm) / 0.04 dB (for 1310, 1550 nm) |
Loss range (1-way Autotest) | 27 dB @ 62.5 µm (for 850, 1300 nm) / 47 dB (for 1310, 1550 nm) |
Loss repeatability & loss linearity (1-way Autotest) | 0.06 dB (for 850, 1300 nm) / 0.04 dB (for 1310, 1550 nm) |
ORL range | 0 ~ >60 dB (1310, 1550 nm) / 0 ~ 30 dB @ 62.5 µm |
ORL port isolation | > 60 dB (1310, 1550 nm) / > 25 dB (850, 1300 nm) |
ORL resolution | For 1310, 1550 nm: 0.01 dB (@ 0 ~ 50 dB), 0.1 dB (@ 50 ~ 65 dB) / For 850, 1300 nm: 0.01 dB (@ 0 ~ 30 dB), 0.1 dB (@ 30 ~ 45 dB) |
ORL accuracy | 0.2 dB |
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

Mandrel Wrap Filters, 50 & 62.5 um OPT701

Low Reflection Terminator, SC/PC OPT703

Low Reflection Terminator, SC/APC OPT704

OPT706

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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