Industrial B165B500-25 Single Port Pressure Switch

BlackMax's B165B500-25 Industrial Single Port Pressure Switch precisely controls an air compressor’s cycling by turning on at 95 psi and turning off at 125 psi, using a single inlet port and an integrated unloader function. This model is a common replacement part for Coleman Powermate Sanborn systems, listed to fit 165B400, 165BL500, 165BC500, and M165 portable single‑stage oil‑bath compressors, making it a straightforward option when restoring proper pressure switching in 165‑series units. The 1‑port configuration supports a simple pressure‑switch layout, with a lever on/off mechanism for manual control when needed and an automatic mode that maintains the selected pressure range to protect the system from under‑ or over‑pressurization. In practice, when the tank pressure reaches 125 psi, the switch shuts the compressor off; as the pressure falls to 95 psi, it re‑engages to restart operation, delivering stable output for pneumatic tools and applications that rely on consistent pressure. This replacement part is ideal for users seeking an exact, drop‑in solution for 95/125 psi systems that require reliable, simple‑duty cycling in portable or stationary compressor setups without introducing additional complexity.