Waterproof magnetostrictive displacement sensors are used in hydraulic, marine, and outdoor systems where moisture, oil, and dust can damage ordinary sensors. Their price varies by stroke length, output signal, accuracy, housing material, cable type, and certification. A basic 100 mm waterproof model may cost USD 180 to 350. A 1000 mm stainless steel unit with analog or Modbus output often ranges from USD 450 to 900. High-accuracy, high-pressure, IP68 or IP69K rated sensors with custom connectors can exceed USD 1,200. Several factors set the final quote. First, measuring range: longer strokes require longer waveguides and more precise assembly. Second, output: 4-20 mA, 0-10 V, RS485, SSI, or CANopen affect electronics cost. Third, protection: IP67, IP68, and IP69K need sealed housings, welded parts, and robust cables. Fourth, accuracy and repeatability: 0.01% FS or lower raises testing and calibration costs. Fifth, temperature and pressure ratings: marine, mobile hydraulic, and offshore use demand stronger materials and testing. Buyers should compare total value, not only the unit price. Check whether the supplier offers mounting threads, stroke calibration, EMC protection, surge protection, and fast delivery. Ask for a datasheet, test report, warranty, and samples. For OEM projects, volume orders can reduce cost by 10% to 30%. Reliable suppliers may quote higher prices, but better sealing and stable output reduce downtime, replacement, and maintenance costs. This balances performance and cost.