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- Bently Nevada
- 990 and 991 Transmitter
- 991-25-50-01-05
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Need more help? You may also find the answer in our FAQ section
We provide 1 year warranty for all remaining parts.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online.
If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.
Amikon offers a wide range of components, products and services related to industrial automation. We have a large surplus of stocks and are also distributors of new products from a variety of quality manufacturers.
Technical specifications for 991-25-50-01-05
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Product Model991-25-50-01-05
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Product Parameters991 Thrust Transmitter
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Tariff Code8537101190
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Country of originUSA
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Place of shipmentXiamen, China
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Estimated Shipping Size10x7.4x6cm
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ManufacturerBently Nevada
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Weight0.5 kg
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Full-scale Option25-0-25 mils
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System Length Option5.0 meters (16.4 feet)
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Mounting Option35 mm DIN-rail clips
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Agency Approval OptionCSA Division 2, ATEX Zone 0 ATEXZone 2 and includes ABSmaritime approval
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Current Limiting23 mA typical
Description
25 25-0-25 mils
50 5.0 meters (16.4 feet)
01 35 mm DIN-rail clips
05CSA Division 2, ATEX Zone 0
ATEXZone 2 and includes
ABSmaritime approval
50 5.0 meters (16.4 feet)
01 35 mm DIN-rail clips
05CSA Division 2, ATEX Zone 0
ATEXZone 2 and includes
ABSmaritime approval
Information
Overview
Manuals
Model Configuration Features
Product Applications
Diagnostic Features Supporting Protection
Features:
- Non-interacting zero and span potentiometers underthe Transmitter label supports loop adjustment
- A Power-up Inhibit circuit eliminates signal errors dueto line voltage transients
- Choice of DIN-rail clips or bulkhead mounting screwsas standard options simplifies mounting
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 axialposition1, and provides it as a 4 to 20 mA industry-standardsignal for input to the control system where machineryprotection alarming and logic occurs
The 991-25-50-01-05 Bently Nevada 991 Thrust Transmitter may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 991-25-50-01-05 991-25-50-01-05 Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Measurement Range (-25): Configured for 25-0-25 mils (approx. 0.6-0-0.6 mm). This provides a centered "zero" point to monitor shaft movement in both directions.
System Length (-50): Calibrated for a 5.0 meter total system length (Proximity Probe + Extension Cable).
Mounting (-01): Includes the hardware for 35 mm DIN-rail mounting, making it easy to install in standard industrial cabinets.
Approvals (-05): A multi-agency approval rating including CSA, ATEX/IECEx (Zone 0, 1, and 2), and maritime certifications (ABS).
- Oil and gas: Monitoring the axial position of large centrifugal compressors and turbines.
- Power plants: Monitoring the axial thrust of steam turbines, water turbines and large generators.
- Petrochemical and chemical industries: Various heavy-duty pump equipment and fans.
- General manufacturing: Small compressors, motors and ventilation equipment.
This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
Dynamic Signal Access (PROX OUT): A non-isolated coaxial connector allows you to connect an oscilloscope or analyzer to view the raw vibration/gap voltage signal without interrupting the 4–20 mA protection loop.
Test Input Pin: Allows technicians to inject a variable DC voltage to verify the 4–20 mA loop output without needing to move the machine shaft.
- What happens next
- Get the quote now Write Email to INFO@AMIKON.CNEmail confirmation You will get an email confirming that we have received your enquiry.Dedicated Account Manager One of our team will be in touch to confirm your part(s) specification and condition.Your quote You will receive a comprehensive quote tailored to your specific needs.Need Moore Help? Get fast and efficient help from our experienced sales or customer service teams.
- Delivery and payment
- Delivery
Logistic partners UPS, FedEx and DHL
International delivery available
Same day dispatch from warehouse inventory
Warranty
All parts new original are covered by Amikon 12 month warranty
Returns
No hassle returns policy
Dedicated customer support team
Payment options
We accept Bank transfers and the following methods of payment:
For more information, please visit our dedicated payments page.
- Why Choose Amikon Limited?
When it comes to industrial automation, reliability, speed, and trust matter. At Amikon Limited, we go beyond just supplying parts — we deliver confidence.
- ● Extensive Inventory Reach: Nearly 1 million automation parts at your fingertips, including legacy and obsolete models.
- ● 20+ Years of Expertise: Trusted by engineers, project managers and government companies worldwide for our professional service.
- ● Quality You Can Trust: Each unit is strictly inspected by the warehouse staff to ensure product quality
- ● Fast Global Shipping: We help you minimize downtime with express logistics worldwide.
- ● 1-Year Warranty Available: Peace of mind with every purchase backed by one year warranty guarantee.
Whether you're maintaining legacy systems or building future-ready projects, Amikon Limited is your dependable partner in precision and performance.
FAQs
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What does the Bently Nevada 991-25-50-01-05 measure?
+It measures shaft thrust (axial position) on rotating machinery, converting the signal from a 3300 NSv proximity probe into a 4–20 mA output proportional to the shaft's axial position. -
What probe is required for this transmitter?
+This transmitter is designed to work with the 3300 NSv proximity probe and its matching extension cable. -
What is 991-25-50-01-05?
+The Bently Nevada 991-25-50-01-05 is a 2-wire, loop-powered Thrust Transmitter. It is designed to provide a 4–20 mA signal proportional to a shaft's axial position (thrust), making it a staple for monitoring smaller, non-critical machinery like centrifugal air compressors, pumps, and fans. -
What happens if the probe fails or the cable is disconnected?
+The transmitter includes a "Not OK/Signal Defeat" circuit. If the probe signal goes out of range , the output will drop below 3.6 mA within 100 µs. This prevents the control system from triggering a false high-thrust alarm. -
Which sensors are compatible with this 991-25-50-01-05?
+This transmitter is designed for use with the 3300 NSv proximity probe and its accompanying extension cable. It does not work properly with standard 5 mm or 8 mm probes.
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Disclaimer: Amikon Limited sells new and surplus products and develops channels for purchasing such products. Amikon Limited is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because Amikon Limited is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. Amikon Limited is not an authorized distributor, dealer, or representative of the products displayed on this website. All product names, trademarks, brands, and logos used on this website are the property of their respective owners. The description, explanation, or sale of products with these names, trademarks, brands, and logos is for identification purposes only and is not intended to indicate any association with or authorization from any rights holder.
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32D UNITS,GUOMAO BUILDING,NO 388 HUBIN SOUTH ROAD,SIMING DISTRICT,XIAMEN