Bently Nevada 991-25-70-01-01 991 Thrust Transmitter Module

Availability: 10 left in stock

The Bently Nevada 991-25-70-01-01, also cataloged as the 991 Thrust Transmitter Module, operates as a dedicated hardware component for axial...

SKU: 991-25-70-01-01

Manufacturer: Bently Nevada
Product No.: 991-25-70-01-01
Product Type: Thrust Transmitters
Product Origin: USA
Payment:T/T, Western Union
Weight: 430g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

The Bently Nevada 991-25-70-01-01, also cataloged as the 991 Thrust Transmitter Module, operates as a dedicated hardware component for axial shaft displacement measurement within machinery protection systems.

Suffix Breakdown & Model Matrix

Option Code	Option Description	Technical Definition
991	Base Model	Thrust Transmitter Module
-25	Full-scale Range Option	+/-25 mils (25-0-25 mils) axial displacement range
-70	System Cable Length Option	7.0 m (23.0 ft) total system length calibration
-01	Mounting Option	35 mm DIN-rail clips installed
-01	Agency Approval Option	CSA Division 2 approval rating

Hardware Specifications

Parameter	Specification
Model	991-25-70-01-01
Brand	Bently Nevada
Origin	USA
Product Type	Thrust Transmitters
Transmitter Type	2-wire loop-powered thrust transmitter
Full-Scale Range	+/-25 mils (25-0-25 mils) axial displacement
System Cable Length	7.0 m (23.0 ft)
Output Signal	Proportional loop-powered transmitter signal
Power Consumption	Loop-powered via output current loop
Mounting Interface	35 mm DIN-rail clips
Housing Material	AISI 303/304 stainless steel
Transducer Tip Material	Polyphenylene sulfide (PPS)
Cable Type	75 ohm coaxial, FEP insulated (Optional AISI 302 stainless steel armor with FEP jacket)
Agency Approval	CSA Division 2
Operating Temp	-35 to +85 deg C (-31 to +185 deg F)
Storage Temp	-51 to +100 deg C (-60 to +212 deg F)
Weight	0.95 lb
Dimensions	Standard 991 module enclosure profile

Gap Voltage Validation (-10 VDC Targets) & Rotor Dynamics

The module translates proximity transducer output into a 2-wire current loop signal proportional to rotor position along the axial plane. Correct loop calibration requires physical gap voltage validation across raw signal test terminals, establishing a nominal -10 VDC baseline bias when the machine shaft rests at the mechanical center of its thrust bearing clearance. This setup maintains accurate signal processing of dynamic rotor position variations caused by mechanical thrust load changes.

Frequently Asked Questions

Q: What power interface drives the transmitter output signal?

A: Operating power is drawn directly from the 2-wire loop current interface connected to the control system or monitoring panel.

Q: What construction materials are used for the transmitter sensor head and housing?

A: The main housing uses AISI 303/304 stainless steel, while the transducer tip is constructed from high-durability Polyphenylene sulfide (PPS).

Q: Does the extension cable specify particular electrical impedance and jacketing?

A: Yes, the transmitter system utilizes a 75 ohm FEP-insulated coaxial cable, with options for an AISI 302 stainless steel armor sleeve with an outer FEP jacket.

Field Installation Guidelines

Mount the module securely onto a standard 35 mm DIN rail inside an enclosure, confirming clip lock retention.
Interconnect the 75 ohm FEP coaxial cable assembly between the probe interface and the transmitter input terminal, ensuring tight coaxial seating.
Verify the static DC bias using a calibrated multimeter across raw signal terminals, adjusting physical probe standoff to hit the -10 VDC target.
Wire the 2-wire output terminals to the receiving analog input card using shielded twisted-pair cabling.
Terminate the field cable drain wire at a single point to the enclosure instrument earthing bus bar to eliminate noise coupling.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.