Limits on tensor type weak currents from nuclear and neutron $\beta$~decays

The limits on time-reversal invariant tensor-type weak currents from nuclear and neutron $\beta$ decays are evaluated including most recent experimental data. We find that $ -0.14 \times 10^{-2} < (C_T + C^\prime_T)/C_A < 1.4 \times 10^{-2} $and$ -0.16 < (C_T - C^\prime_T)/C_A < 0.16$ (90% C.L.), while for the case $C_T=C_T^{\mathrm{\prime }}$ the limits are $\mathrm{\mid }{C}_T\mathrm{/}{C}_A\mathrm{\mid }<3.7\times {10}^{-3}$. These limits are shown to be more stringent than those from recent measurements of the radiative pion decay. In addition, the sensitivity of future ${10}^{-3}$-level correlation measurements is investigated.