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Common Applications
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Technical specifications for 991-25-50-01-05
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Manufacturer:Bently Nevada
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Product Category:Machinery Monitoring Systems
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Spare Part Number:991-25-50-01-05
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Estimated shipping dimensions:10x7.3x6cm
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Weight:0.44 kg
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Tariff Code:8537101190
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Counliy of origin:USA
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Full-scale Option:25-0-25 mils
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System Length Option:5.0 metres (16.4 feet)
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Mounting Option:35 mm DIN-rail clips
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Agency Approval Option:Multiple Approvals (CSA NRTL/C and BASEEFA/CENELEC, which includes CSA Division 2)
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Current Limiting:23 mA typical
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Supply voltage:-17.5 Vdc to -26 Vdc
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Normal range:4 to 20 mA
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Output impedance:10 k Ω
Information
Overview
Manuals
Internal Device Protection
Core functional points
The Bently Nevada 991-25-50-01-05 is a loop-powered thrust transmitter designed to measure shaft axial position.
- Thrust Transmitter
- Buffer raw output
- Not OK suppression circuit
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 991-25-50-01-05 Thrust Transmitter 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.
This transmitter integrates advanced reverse polarity protection and overvoltage surge suppression circuits, which can effectively prevent damage to internal precision electronic components caused by external power supply wiring errors or transient surges. Its core circuit is encapsulated in a high-performance polycarbonate shell, which has excellent electrical isolation performance and can eliminate common grounding loop interference in industrial sites.
Two wire output: standard 4-20 mA proportional current, simple wiring. Buffer signal output (Prox Out): Provides raw voltage signals (usually BNC interfaces or terminals) for easy fault diagnosis and spectrum analysis using portable instruments.
Not OK suppression circuit: When the sensor fails or disconnects, the current will drop below 3.6 mA, effectively preventing false tripping. Power on suppression circuit: prevents false alarms triggered by current surges at the moment of device startup.
FAQ View All FAQ
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What device is the 991-25-50-01-05?This is a transmitter used to monitor the axial displacement (thrust) of mechanical components such as centrifugal compressors, pumps, or motors. It converts the physical displacement measured by the probe into a standard 4-20 mA proportional output signal.
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What is the 991-25-50-01-05 input voltage?Usually requires a DC power supply of -17.5 Vdc to -26 Vdc (commonly used in 24V systems).
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What type of probe is 991-25-50-01-05 supported?This model is specifically designed to work with the 3300 NSv proximity sensor system (probe+extension cable) and is characterized by its small size, making it suitable for installation in limited space.
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How to install the 991-25-50-01-05?Installation using 35mm DIN rails, or backplate installation can be selected according to requirements.
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Is there an anti false alarm function?have It has a 'Not OK' suppression circuit. If the probe experiences an open circuit, short circuit, or abnormal signal, the transmitter will output a current lower than 3.6 mA to prevent the control system from mistakenly believing that the axial displacement exceeds the standard and triggering a trip.
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What is its operating temperature range?Usually ranging from -35 ° C to+85 ° C (-31 ° F to+185 ° F).
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Is the 991-25-50-01-05 output current fixed at 4mA or 20mA?This usually means that the probe is not properly aligned (the installation gap is not in the linear zone) or the probe cable connection is poor. Please check the voltage of the buffer output port.
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