Pressure

Pressure

Pressure measurement comprises transmitters and sensing elements that quantify absolute, gauge, and differential pressure in liquids, pastes, and gases. Because pressure is directly tied to equipment protection and process stability, it is one of the most widely applied measurements in process automation. Beyond direct pressure indication, the same technology is commonly used to infer level (hydrostatic head) and flow (differential-pressure flow measurement) when appropriate primary elements are used.

Absolute and gauge pressure instruments address sealed, vented, and vacuum-related applications, while differential pressure measurement targets filters, pumps, heat exchangers, and flow elements where ΔP is the critical variable. Selecting sensor technology and process isolation concepts is driven by temperature, overpressure potential, corrosion and abrasion, hygienic requirements, and the need for hazardous-area or safety approvals.

Benefits include improved process safety through reliable alarming, protection of rotating equipment via suction/discharge monitoring, and tighter control of reactors, columns, and utility systems. Differential pressure across strainers and filters provides early indication of fouling, while stable pressure measurement supports consistent flow and temperature control performance. Where digital communication and diagnostics are available, device health information can shorten troubleshooting cycles and support proactive maintenance.

Typical applications span chemical and petrochemical processing (reactors, distillation, transfer lines), water and wastewater (pump stations, distribution pressure, filter monitoring), power and utilities (steam systems and condensate return), and hygienic production (vessels, skids, and clean utilities). Pressure-based level measurement is widely used in tanks and sumps where density is stable, and differential pressure is applied to measure interface or density under defined conditions.

Long-term accuracy and reliability depend on correct selection of wetted materials, impulse line or capillary design where used, mounting location, and protection against vibration, thermal cycling, and pressure spikes. Standardized configuration, calibration documentation, and integration into control and asset-management systems help maintain consistent performance over the instrument lifecycle. 
Endress+Hauser

Miller Mechanical Specialties, an exclusive authorized representative of sales and service for Endress+Hauser.