  We present a strangeness-neutral equation of state for QCD that exhibits
critical behavior and matches lattice QCD results for the Taylor-expanded
thermodynamic variables up to fourth-order in $\mu_B/T$. It is compatible with
the SMASH hadronic transport approach and has a range of temperatures and
baryonic chemical potentials relevant for phase II of the Beam Energy Scan at
RHIC. We provide an updated version of the software BES-EoS, which produces an
equation of state for QCD that includes a critical point in the 3D Ising model
universality class. This new version also includes isentropic trejectories and
the critical contribution to the correlation length. Since heavy-ion collisions
have zero global net-strangeness density and a fixed ratio of electric charge
to baryon number, the BES-EoS is more suitable to describe this system.
Comparison with the previous version of the EoS is thoroughly discussed.
