Bently Nevada 190501-09-00-00 Velomitor CT Velocity Transducer

Description

The 190501-09-00-00 Velomitor CT Velocity Transducer is a specialized, low-frequency piezoelectric velocity sensor designed for monitoring casing vibration on cooling towers and air-cooled heat-exchanger fan assemblies. This configuration features Option 09 (3/8-24 to 1/4 NPT Plate Stud) for robust mechanical mounting and Option 00 (MIL-C-5015 connection interface) with no hazardous area approvals. The transducer is engineered to operate effectively at speeds of 90 rpm and above (typically 100 to 300 rpm). It provides accurate velocity measurements for common machine malfunctions such as unbalance and misalignment by monitoring vibration transmitted to the machine casing or bearing housing. As an isolated, self-generating sensor, the unit does not require external power for the transducer itself, relying on its internal piezoelectric element to convert casing vibration into a proportional voltage output.

Features

• Option 09 mounting hardware: 3/8-24 to 1/4 NPT Plate Stud for secure installation
• Option 00 connection: MIL-C-5015 2-pin stainless steel connector
• Option 00 agency approval: General purpose/No hazardous area rating
• Low-frequency response optimized for 3.0 Hz to 900 Hz range (180 to 54,000 cpm)
• Sensitivity: 3.94 mV/mm/s (100 mV/in/s) at 100 Hz
• Case Material: 316L stainless steel for corrosion resistance
• Internal electronics electrically isolated from the sensor case

Applications

• Cooling tower fan assemblies
• Air-cooled heat exchanger fans
• Low-speed rotating machinery casing vibration monitoring
• General industrial vibration protection where low-frequency sensing is required

Ordering Information

Option	Code on This SKU	Description
Orderable Part Number	190501-09-00-00	Velomitor CT Velocity Transducer
A - Mounting Hardware	09	Plate Stud 3/8-in 24 to 1/4-in NPT
B - Connection Option	00	MIL-C-5015 connection interface
C - Agency Approval	00	No Approvals

Technical Specifications

Manufacturer	Bently Nevada
Part Number	190501-09-00-00
Sensitivity	3.94 mV/mm/s (100 mV/in/s) +/- 5%
Frequency Response	3.0 Hz to 900 Hz (+/- 1.0 dB); 1.5 Hz to 1.0 kHz (+/- 3.0 dB)
Velocity Range	63.5 mm/s pk (2.5 in/s pk)
Case Material	316L Stainless Steel
Connector	2-pin MIL-C-5015, top exit
Operating Temperature	-40 degC to +85 degC
Weight	< 297 g (10.5 oz)
Mounting Torque	4.5 N-m +/- 0.6 N-m

Installation Guidelines

• Install the transducer directly on the bearing housing or machine casing to maintain amplitude and frequency response integrity.
• Avoid mounting on thin casings that may dampen signal transmission; use the provided adhesive mount base kit if drilling is not possible.
• Ensure the mounting surface is clean and flat to meet the required torque specifications.
• The sensor can be installed in any orientation.
• Route cables away from high-temperature areas and ensure proper shielding to prevent signal degradation.