For sale, a quantity of Differential Pressure Sensors from the international company Siemens. Manufacturer: Siemens (Original) Model: QBM65-1 (Measures small ranges with high accuracy) Condition: Brand new (stored in its box with catalog and accessories) Technical Use: Monitoring air filter efficiency, fan control, air flow balancing in ducts, and pressure monitoring in operating rooms, isolation rooms in hospitals, laboratories, malls, and large centers. Output: Analog (0 to 10 VDC) compatible with control panels, BMS, and DDC systems. Price: Single unit price: [250 SAR] Special and very attractive price for those who wish to purchase the entire quantity (reasonably negotiable). Approximately 30 units.