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The 99l Thrust Transmitter is intended primarily for theoriginal equipment manufacturers (OEMs) of centrifugal aircompressors or small pumps, motors, or fans who prefer toprovide a simple 4 to 20 mA proportional axial displacement(thrust) signal as the input to their machinery control system.The transmitter is a 2-wire, loop-powered device thataccepts input from our 3300 NSv proximity probe and itsmatching extension cable (available in 5 m and 7 m systemlength options). The transmitter conditions the signal intoappropriate engineering units proportional to the shaft's axialpositionl, and provides it as a 4 to 20 mA industry-standardsignal for input to the control system where machineryprotection alarming and logic occurs2.

Frequently Asked Questions

Q : What is the Bently Nevada 991-06-70-02-01?

It is a 2-wire, loop-powered Thrust (Axial Displacement) Transmitter that converts proximity probe signals into a 4-20 mA industry-standard output.

Q : What is the standard power requirement for this unit?

It operates on a standard +24 Vdc loop power supply (typically acceptable from 12 to 36 Vdc depending on loop resistance).

Q : How do I mount the 991-06-70-02-01 transmitter?

It is designed to snap directly onto standard 35mm DIN rails or be mounted on a flat panel surface.

Q : What is the wiring configuration for the 4-20 mA loop?

It uses a 2-wire loop configuration where the same pair of wires delivers power to the transmitter and carries the 4-20 mA analog signal.

Product Applications

Oil and gas chemical plants: Used to monitor the axial movement of large centrifugal compressors, reciprocating compressors, and high-pressure pumps to prevent severe collisions between the rotor and stator.

Power plants (thermal/hydropower/nuclear power): Installed on steam turbines, feedwater pumps, large forced and induced draft fans, and generator sets for real-time monitoring of axial bearing wear.

Air separation plants and steel mills: Used in core air compressor units and large blast furnace blowers to ensure continuous production lines do not shut down without warning due to rotating machinery failures.

Water treatment and chemical plants: Used for the protection of small and medium-sized high-power industrial pumps, motors, and large industrial fans.