The Protech by Hirsch SDI‑77XL‑MW‑VD is a high‑performance, single‑technology microwave vehicular detector engineered for long‑range, narrow‑angle coverage and directional discrimination. Designed to detect approaching or receding vehicles at distances up to 100 ft, the MW‑VD version uses PROTECH’s advanced Stereo Doppler microwave technology, delivering precise vehicle detection even in challenging outdoor environments. A built‑in direction‑control switch allows the installer to define whether the sensor responds to approaching vehicles, receding vehicles, or both, helping reduce nuisance alarms from undesired traffic flow. Housed in a rugged metal enclosure with EMI/RFI resistance and equipped with PROTECH’s weather shroud for harsh‑environment protection, the SDI‑77XL‑MW‑VD ensures reliable, stable detection for gates, access roads, industrial yards, or perimeter vehicle approaches. The unit mounts to standard PIRAMID brackets, including PH‑4 and PH‑4A pole mounts, offering flexible installation across a wide variety of outdoor sites.