Condition: Used — ARC count will be above 5000. These are fully tested and working units. Due to their age and usage, some wear and cosmetic imperfections should be expected; pricing is reflective of this. Multiple units are available — if you require a larger quantity, please get in touch as discounts may apply.

Included in the sale:
• Fujikura FSM-12S SM/MM Arc Fiber Fusion Splicer (ARC count above 5000)
• Fujikura CT-30 High Precision Fiber Cleaver with Case
• FH-60-250 Fiber Holder Set
• FH-60-900 Fiber Holder Set
• AC Adapter/Charger
• Hard Carrying Case with Strap
• Work Tray
• Fiber Stripper
• Screwdriver
• 12S Quick Reference Guide

Please note that we have multiple units in stock, and the images presented are of one of them, therefore the cosmetic condition of the exact item you will receive may slightly differ.

The Fujikura FSM-12S is widely regarded as one of the world's smallest, lightest, and most portable fusion splicers. Despite its compact and ruggedised form factor, it delivers professional-grade splicing performance with features typically found in higher-specification models. Designed for use in challenging field environments, the 12S is an ideal choice for FTTx installations, outside plant work, and remote locations where portability and reliability are paramount.

The innovative transit case doubles as a stable workstation, and the long-life battery provides up to 100 splice and heat cycles per charge. The dual-camera CMOS viewing system and fixed V-groove alignment deliver consistent, low-loss splices across a wide range of fibre types.

Model: Fujikura FSM-12S Fusion Splicer
Applicable Fibres: SM (G.652, G.657), MM (G.651), DSF (G.653), NZDSF (G.655)
Cladding Diameter: 125 μm
Coating Diameter: 250 μm or 900 μm
Fibre Cleave Length: 5 mm to 13 mm
Typical Splice Loss: SM 0.05 dB, MM 0.02 dB, DSF 0.08 dB, NZDSF 0.08 dB
Splicing Time: Approx. 15 seconds (SM)
Splice Modes: 100 programmable splice modes
Splice Result Storage: Last 2,000 splices
Arc Calibration: Auto real-time, based on previous splice results, or manual
Display: 4.5-inch TFT colour LCD with X, Y, or combined X/Y views
Magnification: 100× for X/Y view
Viewing System: 2-axis CMOS camera
Tube Heater Modes: 30 heating modes
Tube Heating Time: Approx. 30 seconds with FP-03 (60 mm sleeve)
Sleeve Compatibility: 60 mm, 40 mm, and micro sleeves
Battery Capacity: Up to 100 splice and heat cycles (BTR-10)
Electrode Life: 3,000 splices
Mechanical Proof Test: 1.96 N
Wind Resistance: Up to 15 m/s (34 mph)
Operating Altitude: 0 to 3,660 m
Operating Temperature: -10 °C to 50 °C
Operating Humidity: 0 to 95% RH (non-condensing)
Power Supply: AC 100–240 V (auto-select), DC 14.8 V with battery
Terminals: USB 2.0
Dimensions: 121 × 162 × 57 mm
Weight: 0.776 kg (with battery)

Fujikura FSM-12S Fusion Splicer Product Brochure (PDF): Download PDF

Shipping & Returns Policy

Shipping Policy

• Processing Time: Orders are typically processed and dispatched within 1 business day.
• Shipping Methods: We offer Expedited Shipping to all destinations using UPS/DHL/Fedex/Royal Mail and other reputable carriers.
• Shipping Times: Mainland UK: 1-2 Business Days / Mainland Europe and USA: 2-3 Business Days / Rest of the World 5-7 Business Days.
• Shipping Costs: These are calculated at checkout based on the shipping method, destination and package dimensions.
• CUSTOMS AND TAXES: It is YOUR responsibility to liaise with customs in your country and ensure your package is cleared and any taxes are paid.
• Shipping Destinations: We ship worldwide.
• Tracking: Once your order is shipped, we will provide you with a tracking number via email.
• Insurance: All shipments are insured. In case of damage, please contact us via email within 48 hours of receiving the product with photographic evidence, please also ensure a report is logged with the delivery driver.

Returns Policy

• Return Period: In the event of an item being received which is 'not as specified', you can return your purchase within 14 days of delivery.
• Condition of Items: Items must be returned unused and in their original packaging.
• Return Method: All returns must be notified in writing to hello@ttinstruments.com, the email should accompany the order number, date and reason for return and must be within 14 days of delivery.
• Restocking Fees: A restocking fee of up-to 20% is applicable for items returned for any reason other than 'not as specified'.
• Refund Method: Refunds are processed to the original method of payment within 5 business days of receiving the return.
• Exchanges: We do not offer exchanges. It will either be a replacement or a refund.
• Return Shipping Costs: Return shipping costs will be borne by the customer unless the item is 'not as specified', in this case we will arrange for the return by way of a prepaid shipping label.