Bently Nevada 190501-12-00-02 Velomitor CT Transducer

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190501-12-00-02 Overview

The 190501-12-00-02 Velomitor CT Velocity Transducer is a low-frequency version of standard Velomitor Piezo-velocity Sensor. Its design specifically measures casing vibration velocity on cooling tower and air-cooled heat-exchanger fan assemblies that operate at or above 90 rpm (100 to 300 rpm typical). 
The 190501-12-00-02 Velomitor CT Transducer can measure vibration amplitudes at these frequencies as well as the vibration frequencies generated by the fan motor and speed reducer.

190501-12-00-02 Parameters

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Sensitivity: 3.94 mV/mm/s (100 mV/in/s) ±5%
Frequency Response:
3.0 Hz to 900 Hz (180 to 54,000 cpm) ±1.0 dB
1.5 Hz to 1.0 kHz (90 to 60,000 cpm) ±3.0 dB
Velocity Range: 63.5 mm/s pk (2.5 in/s pk)
Operating Temperature: -40°C to +85°C (-40°F to +185°F)
Storage Temperature: -40°C to +100°C (-40°F to +212°F)
Output Bias Voltage: 10.1 Vdc ± 1.0 Vdc (Pin A referenced to Pin B)
Case Material: 316L stainless steel
Connector: 2-pin 316L stainless steel MIL-C-5015, top mounted
Mounting Torque: 4.5 N·m ± 0.6 N·m (40 in-lbf ± 5 in-lbf)

FAQ about 190501-12-00-02

1. What is the primary application for the Velomitor CT transducer?

It is specifically designed to measure casing vibration velocity on cooling tower and air-cooled heat-exchanger fan assemblies that operate at or above 90 rpm (typically 100 to 300 rpm). It can also measure vibration frequencies generated by the fan motor and speed reducer.

2. What does the "-02" agency approval option mean?

The "-02" option indicates that this transducer carries multiple hazardous area approvals, including CSA/NRTL/C for North American installations (Class I, Division I) and ATEX/IECEx for international use (Class I, Zone 0/1). It is approved for intrinsically safe (Ex ia) and non-incendive (Ex ec) applications.

3. What is the correct mounting torque for this transducer?

The recommended mounting torque is 4.5 N·m ± 0.6 N·m (40 in-lbf ± 5 in-lbf) . Proper torque is critical to ensure accurate measurements and prevent damage to the transducer or machine.

4. What type of connector does this transducer use?

It uses a rugged 2-pin 316L stainless steel MIL-C-5015 top-mounted connector (connection option "00") . The pinout is: Pin A (power/signal positive), Pin B (common), and case ground.

5. What is the maximum recommended cable length?

The maximum cable length is 305 meters (1,000 feet) of part number 02173006 cable with no degradation of signal. However, the maximum continuous length of cable available is 91.44 m (300 ft); longer lengths require splicing or connectors.

6.What is the plate stud mounting option (option "12")?

Option "12" provides a plate stud adapter with 3/8-24 to M8x1 threads. This allows the transducer to be mounted on surfaces that accept M8x1 metric threads, providing flexibility for different machine configurations.