This document is a technical report detailing the application of a pressure transmitter in an industrial pilot plant. It outlines the challenges faced in pilot plant design, particularly the need for compact instrumentation due to the small scale of operations. The report describes a specific case involving a global chemical corporation that required a low-cost, rugged, and non-incendive pressure transmitter for measuring feed line pressures in a research and development batch reactor process. The solution presented is the 800 series loop-powered pressure transmitter, which features a compact design and was factory calibrated to meet the customer's specifications. The report highlights key features of the 800 series, including its hermetically sealed enclosure, NEMA 4X/IP66 housing, high accuracy, and EMI/RFI protection. Additionally, it notes the transmitter's approvals for use in hazardous locations and its field-adjustable set points, making it suitable for pilot plant applications.