A Dual 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 multimode fiber at 850 / 1330nm. A pair of these compact instruments set new standards of productivity, accuracy and ease of use. A multimode APC connector on this model is required for reliable ORL test performance. The 650 nm VFL VisiTester feature mixes a VFL in with the test signal during Autotest. It operates as a stand-alone VFL, or gives positive visual identification of a fiber to be connected during loss testing.

Each fiber needs just one test hook-up and one key press for a complete 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. The ORL meter is calibrated with 62.5u fiber, and works on 50u fiber with an appropriate dB offset.

  • 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


Key Features


KI23403OLV-INGAAS-APC specifications
Modulated output (source) 270 Hz, 1 kHz, 2 kHz ± 2 %, 12 Multi-Fiber ID tones
Output wavelength (source) 850-1300 nm LED APC, VisiTester
Output power (source) -27 dBm ±1 dB @ 62.5 µm
Adjust output power (source) Fixed
Stability over temperature (source) 0.35 dB
Short term stability for 15 min, typical ±2 °C, after warm up, ORL < -25 dB (source) 0.01 dB
Wavelength drift (source) 0.4 nm per °C (typical)
Mode controlled (source) 50/125µm compliant: IEC 61280-4-1 {Ed.1.0}, TIA 526-14A & TIA TSB-178
Reconnection repeatability @ 95% confidence (source) 0.05 dB
Length range (2-way Autotest only) 4.5 dB @ 62.5 µm
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) 24 dB @ 62.5 µm
Loss repeatability & loss linearity (2-way Autotest) 0.06 dB
Loss range (1-way Autotest) 24 dB @ 62.5 µm
Loss repeatability & loss linearity (1-way Autotest) 0.06 dB
ORL range 0 ~ >30 dB @ 62.5 µm
ORL port isolation > 25 dB
ORL accuracy 0.2 dB
ORL resolution 0.01 dB (@ 0 ~ 30 dB), 0.1 dB (@ 30 ~ 45 dB)
VisiTester wavelength 650 ± 5 nm
VisiTester power 0 dBm ± 1 dB @ SMF
VisiTester laser safety Class 1, IEC60825-2
VisiTester blink rate (manual) CW or 2 Hz
General Two-Way Loss / Length / ORL Test Set KI 23400 Series 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 (ISO/IEC 17025) 3 years

Documentation & Support


In the box


LC Hybrid Connector Adapter OPT076

LC Simplex, metal body.


Padded Canvas Carry Pouch OPT149

Soft pouch with carry straps and compartments for accessories storage, able to carry 2x KI2000 series-size instruments.


Mandrel Wrap Filters, 50 & 62.5 um OPT701

25 mm mandrel for 3 mm patch lead, 50 u core. 20 mm mandrel for 3 mm patch lead, x 62.5 u core. FOTP-50 Method A


Low Reflection Terminator, SC/PC OPT703

Typically useful during ORL testing. Specification -55 dB, dependent on PC connector quality.


Low Reflection Terminator, SC/APC OPT704

Typically useful during ORL testing, Specification -65 dB.



MMF SC/PC-SC/APC Lead, 2m, 62.5um Simplex

Software (KITS)

Software (KITS)

Downloadable from Kingfisher's website for free.

Optional accessories


FC Hybrid Connector Adaptor OPT051

FC. OPT081 is preferred for power meters, since FC ceramic sleeves break easily.

USD $19.96

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LC / F3000 Hybrid Connector Adapter OPT072

For F3000 PC Simplex. This is an LC-PC adpater that also fits F3000. For LC-PC only use, OPT076 is better value and more robust.

USD $240.71

In stock
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2.5 mm Universal Hybrid Connector Adapter OPT081

Universal 2.5 mm, including Duplex SC. Please observe application advice.

USD $94.53

In stock
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1.25 mm Universal Hybrid Connector Adapter OPT084

Universal 1.25 mm, including simplex LC. Please observe application advice.

USD $143.21

In stock
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1.25 mm Universal Hybrid Connector Adaptor OPT085

Universal 1.25 mm. Also fits: Duplex LC, Senko CS, SN duplex, and USconec MDC duplex connectors. Please observe application advice.

USD $165.05

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Semi-Rigid Carry Case for Test Kits OPT153-CASE

Canvas case with foam compartments for 2x KI2000 or KI7000 series instrument, 3x KI9000 series instrument and other accessories.

USD $285.84

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Semi-Rigid Carry Case for Test Kits OPT154B

Content: 1x Case (OPT154B-CASE) (suitable for 2x KI2000 series instrument, 1x Microscope, 1x VFL, Accessories); 5x 2.5mm Fiber Conn Cleaning Sticks; 5x 1.25mm Fiber Conn Cleaning Sticks; 1x Blower Brush (TOOL CLEAN-01A); 1x Fiber Conn Cleaning Cartridge(TOOL CLEAN-09A).

USD $425.54

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