Scalable hyperfine qubit state detection via electron shelving in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>2</mml:mn></mml:msup><mml:msub><mml:mi>D</mml:mi><mml:mrow><mml:mn>5</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>2</mml:mn></mml:msup><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:mn>7</mml…

Qubits encoded in hyperfine states of trapped ions are ideal for quantum computation given their long lifetimes and low sensitivity to magnetic fields, yet they suffer from off-resonant scattering during detection, often limiting measurement fidelity. In ${}^{171}{\text{Yb}}^{+}$ this is exacerbated by a fluorescence yield, which leads need complex expensive hardware, problematic bottleneck especially when scaling up the number qubits. We demonstrate detection routine based on electron shelving address issue achieve $5.6\ifmmode\times\else\texttimes\fi{}$ reduction single-ion error an avalanche photodiode $1.8(2)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ 100 $\ensuremath{\mu}\mathrm{s}$ period $4.3\ifmmode\times\else\texttimes\fi{}$ multiplying CCD camera with $7.7(2)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ 400 $\ensuremath{\mu}\mathrm{s}$. further improve characterization repump transition at 760 nm enable more rapid reset auxiliary ${}^{2}{F}_{7/2}$ populated after shelving. Finally, we examine fidelity limit using long-lived state, achieving $300\ifmmode\times\else\texttimes\fi{}$ $12\ifmmode\times\else\texttimes\fi{}$ reductions $6(7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ $6.3(3)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ 1 ms respective detectors. While shelving-rate limited our setup, suggest various techniques realize method speeds compatible information processing, providing pathway ultrahigh-fidelity ${}^{171}{\text{Yb}}^{+}$.