Bently Nevada 990-04-XX-01-05 is a two-wire loop powered Vibration Transmitter belonging to the 990 transmitter series, integrated with built-in proximitor circuit and matched with 3300 NSv proximity probe for non-contact relative shaft vibration monitoring of rotating machinery. This Shaft Displacement Transducer converts the gap variation between probe tip and rotating metal shaft into standard 4-20mA analog signal, which can be directly connected to DCS and PLC control systems, without requiring rack-mounted monitoring modules. The model suffix XX represents configurable total transducer system cable length, optional 5 meters or 7 meters. According to ordering code 990-04-XX-01-05, this unit adopts 35mm DIN rail clip mounting structure and carries CSA Division 2 hazardous area certification, suitable for oil & gas hazardous industrial zones. The transmitter is powered by 12~35V DC loop power supply, equipped with zero and span adjustment potentiometers for field calibration. It reserves BNC buffered raw signal output for on-site signal inspection and troubleshooting. Built-in transducer fault detection circuit can identify probe open circuit, short circuit and connector poor contact, and trigger fault current alarm. Fully potted internal circuit structure can withstand high humidity, condensation and mechanical vibration. The power-up inhibit function avoids false alarms caused by voltage fluctuation during equipment startup. Widely used in power generation, petrochemical and heavy industrial fields, this Two-Wire Loop Powered Transmitter monitors small centrifugal compressors, fans and pumps, tracks rotor vibration trend changes at an early stage, protects bearing components and reduces unplanned equipment shutdown.

Core Attributes:

Brand: Bently Nevada

Model: 990-04-XX-01-05

Product Type: Two-wire Vibration Transmitter

Measurement Range: 0-4 mils pp (0~100μm pp)

Matched Probe: 3300 NSv proximity probe

System Cable Length: configurable (5m /7m)

Power Supply: 12 ~ 35V DC, two-wire loop power

Mount: 35mm DIN rail clip mount

Features: Integrated proximitor circuit, CSA Division2 certification, 4-20mA analog output, BNC buffered signal, transducer fault detection, zero & span adjustable, potted circuit construction