PBN3 Series High Current/Low Pressure Sensors, 1 in-H2O to 6.5 in H2O pressures, smooth perpendicular ports, SPDT, polyurethan diaphragm The Honeywell PBN Series is a range of versatile, low-cost, ultra low pressure switches and sensors. PBM products are compact, lightweight, feature enhanced reliability, and are designed to yield a repeatable response over millions of cycles. They can be mounted in virtually any orientation and their rugged construction allows use in the most rigorous environments. Product specifications such as operating characteristics, termination type, and contact materials can be customized for certain applications.