The photonic Spin Hall Effect (SHE) causes a polarization dependent transverse shift of light at an interface. In this paper, we theoretically investigate the microwave controlled photonic SHE and microwave electrometry in a closed-loop Λ-type atomic system. At zero probe detuning (Δₚ = 0) and relative phase φ=0,π, the photonic SHE magnitude remains at the intrinsic finite beam saturation limit w₀/2, whereas the microwave field shifts its angular position linearly with opposite slopes (signs) for the two phases, enabling differential microwave electric field sensing. At φ=π/2, the photonic SHE magnitude decays exponentially with Ω_μ, providing weak microwave electric field sensing. In contrast, at Δₚ = ± Ω_c (control field coupling), the photonic SHE reaches a maximum of half the incident beam waist when Ω_μ ≥ Ωₚ and the phase φ is optimized. Interestingly, we observed microwave controlled switching of photonic SHE by tuning the relative phase φ at an optimized value of Ω_μ and Ω_c. Our results may have potential applications in microwave quantum sensing and quantum optical switches based on the photonic SHE.