Endress + Hauser NMS81 Mainboard Module

The Endress+Hauser NMS81 Mainboard Module is a critical electronic component used within the Endress+Hauser Proservo NMS81, a high-accuracy servo tank gauging system designed for liquid level, interface, and density measurement. The mainboard serves as the central processing unit of the device, managing signal acquisition from sensors, executing measurement calculations, and coordinating communication with external systems such as PLCs and distributed control systems.

It supports the NMS81’s advanced features including high-precision measurement (up to ±0.4 mm accuracy), multi-protocol communication (e.g., Modbus, HART), and integration with safety and custody transfer systems. The module is designed for industrial reliability, ensuring stable operation in harsh environments typical of oil & gas, petrochemical, and storage tank facilities. As part of the modular design of the NMS81, the mainboard can be replaced during maintenance to restore or upgrade system functionality without replacing the entire instrument.

Typical Applications

• Tank Gauging Systems: Core control module in servo tank gauges used for accurate level measurement in storage tanks.
• Oil & Gas Storage Facilities: Supports custody transfer and inventory control of crude oil, gasoline, diesel, and other hydrocarbons.
• Petrochemical & Chemical Plants: Enables precise monitoring of liquid levels and interfaces in process tanks.
• Maintenance & System Upgrades: Replacement of faulty or aging electronics to maintain measurement accuracy and system reliability.

he Endress + Hauser XPN0036-1VU4/0 mainboard is designed as a replacement electronic module for NMS81 systems. It ensures stable operation and reliable system performance in industrial