Fujikura 27S Splicing Machines 27s Optical Fiber Splicer

The Fujikura 27S is a classic and highly respected series of core alignment single fiber fusion splicers from Fujikura, a world-leading manufacturer in fiber optic technology. While newer models like the 70S and 90S series have since been released, the 27S remains a benchmark for reliability, durability, and consistent performance in the field. It is designed for professional telecommunications, CATV, and network installation technicians who require high-quality splices in various environments.

The 27S series is renowned for its robust metal construction, intuitive operation, and Fujikura's legendary proprietary algorithms that ensure low-loss splices. It successfully bridged the gap between older, bulkier models and the newer, more compact generations of splicers.

Key Features & Characteristics

Superior Core Alignment System: The hallmark of the 27S is its precise core alignment technology. It uses dual cameras to image the fiber's core (for single-mode fiber) or cladding (for multi-mode fiber) from two perpendicular directions (X and Y-axis). This allows the machine to align the fibers with extreme accuracy before fusion, guaranteeing minimal splice loss.

Robust and Durable Design: Built with a durable metal chassis, the 27S is known for its ability to withstand the rigors of field use. It feels solid and professional, inspiring confidence in harsh environments.

Fast and Efficient Operation:

Quick Heating Sleeve Oven: The integrated heat shrink oven (protector heater) has a rapid cycle time, typically curing sleeves in 25-30 seconds.

Fast Arc Calibration: Features like "PAS" (Profile Alignment System) and quick automatic arc calibration ensure the splicing parameters are always optimized for current environmental conditions (e.g., altitude, humidity, temperature).

User-Friendly Interface: It features a clear, high-resolution LCD screen and an intuitive menu system. The keypad is simple and easy to navigate, even while wearing gloves.

Excellent Battery Life: Typically powered by a high-capacity Li-Ion battery pack, the 27S offers a full day's work on a single charge, capable of performing 130+ splices and heats.

Advanced Splicing Programs: Comes pre-loaded with optimized programs for a wide range of fibers, including SMF (G.652, G.657), MMF, DSF, EDF, and more. It also allows for custom program creation.

Reliable Performance Metrics: Consistently achieves industry-leading average splice losses, typically < 0.05 dB for single-mode fiber and < 0.02 dB for multi-mode fiber under ideal conditions.

Model List and Variations

The Fujikura 27S series primarily consists of two main models, with the "Plus" version being an enhanced iteration. The key difference between them is the wind protection technology.

1. Fujikura FSM-27S

This is the base model of the series.

Wind Protection: It features a standard windshield. This is effective for light breezes but may require the technician to use an external wind protector or create a shield with their body in moderately windy conditions.

Core Functionality: It retains all the other high-end features of the series: core alignment, fast heating, robust build, and excellent battery life.

2. Fujikura FSM-27S+ (Plus)

This is the upgraded and more popular model.

Wind Protection: Its defining feature is the Advanced Wind Protection System. This system uses a combination of a physical windshield and software algorithms that can compensate for the effects of wind on the electric arc during the fusion process. This allows for reliable, low-loss splices in windier conditions (up to ~5 m/s) where the standard 27S might struggle.

Other Enhancements: The "Plus" model often also featured minor improvements in processing speed and software stability.

Summary of Model Differences

Feature FSM-27S FSM-27S+ (Plus)

Model Name Fujikura 27S Fujikura 27S+

Alignment Core Alignment Core Alignment

Wind Protection Standard Windshield Advanced Wind Protection System

Splice Loss < 0.05 dB (SMF) < 0.05 dB (SMF)

Heater Time ~25-30 seconds ~25-30 seconds

Battery Li-Ion (130+ splices) Li-Ion (130+ splices)

Note on Availability: As a mature product line, the Fujikura 27S and 27S+ are now primarily available on the refurbished and used market. They are considered an exceptional value, offering professional-grade performance at a fraction of the cost of a new flagship model. When considering one, it is crucial to purchase from a reputable vendor that offers a warranty and has serviced the unit (e.g., cleaned electrodes, updated software, tested performance).