Bently Nevada 1800/15-12-90-02-00 Relative Vibration Transmitter

Shaft Vibration Output for Control Systems

The 1800/15-12-90-02-00 converts proximity probe signals into a proportional 4–20 mA vibration output. This transmitter conditions eddy current readings from shaft measurement points. Reliability engineers therefore apply it wherever control systems need direct vibration feedback. Its sealed housing mounts near the machine without separate signal converters.

Detailed Technical Parameters

Signal conditioning defines this transmitter, because the oscillator circuit drives the probe coil at a stable frequency. The demodulator stage then converts displacement readings into a current loop output. Meanwhile, the sealed housing protects the electronics from oil mist and moisture. Review the essential specifications in the table below.

Parameter	Specification
Function	Relative vibration transmitter with current loop output
Output signal	4–20 mA proportional to vibration
Input signals	Eddy current proximity probe inputs
Dimensions (W × H × D)	60 × 100 × 40 mm
Weight	Approximately 0.3 kg
Interface	Probe connector plus two-wire loop connection
Component count	Oscillator stage plus demodulator and output circuit
Energy storage	Local decoupling capacitor array
Operating temperature	-35 °C to 100 °C

Integration into Monitoring Systems

This unit mounts near the probe location and connects through the probe cable. Commissioning engineers verify loop scaling during startup procedures. Consequently, vibration channels return to service quickly after transmitter replacement. The output stage drives the current loop across the full measurement range. Furthermore, the shielded housing resists interference from nearby power cables and drives.

Why Plants Choose This Transmitter

Many power stations still operate 1800 Series systems for their proven machinery protection. Hence, this transmitter serves as a dependable spare for keeping vibration loops online. Its standardized housing format simplifies stock management across multiple sites. In addition, the robust oscillator maintains accurate readings under electrical noise. The device keeps shaft vibration data flowing and plant operations on schedule.