The Bently Nevada 991-01-XX-01-01 is a loop-powered 991 Thrust Transmitter featuring MOD:284318-01. It converts proximity probe signals into a 4-20 mA output for PLC/DCS integration, providing essential axial position monitoring and protection for rotating machinery.
The Bently Nevada 991-01-XX-01-01 stands as a high-performance, loop-powered vibration transmitter designed specifically for axial displacement monitoring. Unlike standard proximity systems that require a separate monitor rack, this 991 Thrust Transmitter integrates the Proximitor sensor and signal conditioning into a single, compact unit. It converts the eddy current signal from a proximity probe directly into a 4 to 20 mA output. Consequently, this allows the device to interface seamlessly with Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), providing a cost-effective solution for machinery protection without the need for specialized rack-based hardware.
The configuration for the 991-01-XX-01-01 model follows a specific electrical and mechanical profile suitable for industrial integration.
Heavy industries utilize the 991 Thrust Transmitter to protect centrifugal compressors, small steam turbines, and large pumps from axial failure. Because the transmitter monitors the “thrust” or axial position of the shaft, it identifies excessive movement that could lead to rotor-to-stator contact. Furthermore, the 991-01-XX-01-01 incorporates a “not OK” signal feature, which drops the current below 3.6 mA if the probe signal is lost or the cable is severed. This safety mechanism ensures that the control system can distinguish between a mechanical fault and a sensor failure, thereby preventing false alarms and improving plant safety.
The 991 Transmitter facilitates rapid installation due to its DIN-rail mounting capability and simplified wiring requirements. Since it employs a two-wire 4 to 20 mA loop, it significantly reduces the cost of cabling compared to traditional three-wire transducer systems. Additionally, the MOD:284318-01 designation indicates a specific factory modification or custom calibration designed to meet unique application requirements or environmental conditions. By deploying this transmitter, maintenance professionals gain a reliable, real-time window into the internal clearances of their rotating equipment, supporting data-driven maintenance and maximizing uptime for critical assets.
991-06-70-02-01 Product datasheet
Model number: | 991-06-70-02-01 | Module Type： | Thrust Transmitter | |
Manufacture: | Bently Nevada | Condition： | Brand New | |
Range of Product: | 990 Vibration Transmitter | Lead time： | In Stock | |
Weight: | 0.5 kg | HS CODE： | 8537101190 | |
Dimension: | 10x7.3x6cm | MOQ: | 1 | |
Product Origin: | USA | System： | TSI | |
Discontinued on: | active | Communication Service: | Ethernet router |
991-06-70-02-01 Functional Description
The Bently Nevada 991-06-70-02-01 Thrust Transmitteris a specialized thrust transmitter designed for OEMs of centrifugal compressors and rotating equipment. This 2-wire loop-powered device converts proximity probe signals into industry-standard 4-20mA outputs for seamless integration with machinery control systems.
Featuring integrated Proximitor technology, the 991-06-70-02-01 Bently Nevada in Stockeliminates external sensor requirements while providing dynamic vibration outputs for diagnostics. Its non-interacting zero/span potentiometers enable precise loop calibration, and the test input pin allows quick verification of signal integrity.
The Bently Nevada 991-06-70-02-01 PDFoffers exceptional reliability with potted construction for 100% condensing environments. Available with DIN-rail clips or bulkhead mounting options, this transmitter includes power-up inhibit and Signal Defeat circuits to prevent false alarms from voltage transients or probe faults.
Optimized for space-constrained applications, the 990 Vibration Transmitter 991-06-70-02-01 Bently Nevadaworks with 3300 NSv probes in 5m/7m configurations. This makes it ideal for centrifugal compressors and pumps where clearance is limited but precise axial position monitoring is critical.
991-25-70-01-05 Product datasheet
Model number: | 991-25-70-01-05 | Module Type： | Thrust Transmitter | |
Manufacture: | Bently Nevada | Condition： | Brand New | |
Range of Product: | Bently Nevada | Lead time： | In Stock | |
Weight: | 0.5 kg | HS CODE： | 8537101190 | |
Dimension: | 10x6.2×7.5cm | MOQ: | 1 | |
Product Origin: | USA | System： | TSI | |
Discontinued on: | active | Communication Service: | Ethernet router |
991-25-70-01-05 Functional Description
The Bently Nevada 991-25-70-01-05 Thrust Transmitteris a loop-powered thrust transmitter designed for OEM compressor and pump applications, converting proximity probe signals into 4-20mA outputs for axial displacement monitoring. This compact device integrates a Proximitor sensor, eliminating external conditioning units while providing dynamic vibration diagnostics through PROX OUT terminals. The 991-25-70-01-05 Bently Nevada Probe Vibration Transmittersupports both 5m and 7m cable systems, making it ideal for space-constrained installations.
Featuring non-interacting zero/span potentiometers, the 991 Series 2 Wire Thrust Transmitter 991-25-70-01-05enables quick field adjustments without recalibration. Its DIN-rail or bulkhead mounting options accommodate diverse mechanical layouts, while the test input pin allows loop verification using a DC voltage source. The transmitter's potting construction ensures reliable operation in 100% condensing humidity environments.
The Probe Vibration Transmitter 991-25-70-01-05 Bently Nevadaincorporates a power-up inhibit circuit to prevent transient-induced errors and a Not OK/Signal Defeat function to avoid false alarms from probe faults. Compatible with 3300 NSv proximity probes, it delivers accurate thrust measurements even in high-vibration centrifugal compressors.
With its 2-wire loop-powered design and coaxial diagnostic output, the Thrust Transmitter Bently Nevada 991-25-70-01-05meets stringent OEM requirements for machinery control systems in oil & gas, power generation, and industrial applications.
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