The smarttune 5/16” (the second smallest in the smarttune range) is designed specifically for sports and day boats. In minutes it easily swaps in for your existing turnscrew (forestay/backstay/shrouds/diagonals). Designed to be used for long spells in extreme conditions, it charges wirelessly for an astonishing 2,000 hours of continuous battery life, displays live load data direct to your phone, SAILMON MAX display or (with the addition of a Cyclops Marine Gateway) on most on-board electronics systems.


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Next Generation Load Sensing for Standing Rigging on Sports and Day boats

    • Factory calibrated and accurate to +/- 1% of maximum working load. 
    • Pair with smartfittings app for logging and analysis.
    • Wireless Charging.
    • 2,000 Hours Battery Life (10 x previous model)
    • Fully Charged in 1 Hour / Charged for a Full Day’s Use in 1 Minute
    • Live load wirelessly communicated to your phone – approx 60% longer Bluetooth range than previous model.
    • Direct connection with SAILMON MAX display (No Gateway Device Required).
    • Live load wirelessly communicated to other boat electronics via the Cyclops gateway.
    • Enhanced Background Logging on Mobile and Gateway Device.
    • Multiple sensors can be read on one phone or gateway.
    • Precision designed for lowest weight, low windage.
    • Even more Robust & Waterproof.



Thread Size


Metric Thread


Breaking Load

2.45 tonnes


112 x 55 x 18 mm

Device Weight

180 g