Bently Nevada 190501-11-00-04 Velomitor CT Velocity Transducer

Description

The 190501-11-00-04 is a Velomitor CT Velocity Transducer, configured with Option 11 (Plate Stud M6x1 to M6x1 with 3/8-24 adapter), Option 00 (MIL-C-5015 connection interface), and Option 04 (Agency Approval: CSA/NRTL/C Class I, Division 1; ATEX/IECEx Class I, Zone 0/1). This piezo-velocity sensor is specifically engineered for low-frequency applications, providing reliable casing vibration velocity measurements on cooling tower and air-cooled heat-exchanger fan assemblies typically operating at or above 90 rpm.

The Velomitor CT design accurately measures vibration amplitudes at low frequencies, capturing the characteristic signals generated by fan motors and speed reducers. To ensure optimal monitoring, the transducer should be installed directly on the machine casing or bearing housing, as proper mounting is critical to maintaining frequency response and amplitude accuracy. The unit features internal electronics isolated from the case and includes a standard 2-pin MIL-C-5015 connection interface for industrial signal cabling.

Features

• Option 11 Mounting Hardware: Plate Stud M6x1 to M6x1 with 3/8-24 adapter included.
• Option 00 Connection: Standard 2-pin MIL-C-5015 connection interface.
• Option 04 Approval: CSA/NRTL/C Class I, Division 1 and ATEX/IECEx Class I, Zone 0/1 hazardous area ratings.
• Low-frequency response optimized for 3 Hz to 900 Hz (+/- 1.0 dB).
• Sensitivity of 100 mV/in/s (3.94 mV/mm/s).
• Robust 316L stainless steel housing for harsh industrial environments.
• Internal electronics electrically isolated from the transducer case.

Applications

• Cooling tower fan assemblies
• Air-cooled heat exchangers
• Low-speed rotating machinery monitoring
• Casing vibration velocity measurement
• Machine protection systems for unbalance and misalignment detection

Ordering Information

Technical Specifications

Installation Guidelines

• Install the transducer on the bearing housing or machine casing. Avoid mounting on non-load-bearing components.
• Ensure the mounting surface is clean and flat; use the specified torque (4.5 N-m) for secure stud attachment.
• For hazardous area installations (Option 04), follow drawing 167536 for intrinsic safety requirements.
• Use shielded cabling with the MIL-C-5015 connector to minimize electromagnetic interference.
• Humidity limit is 100% condensing; keep cables and connectors clear of submerged conditions.

Compliance and Certifications

• ATEX Directive 2014/34/EU
• EMC Directive 2014/30/EU
• RoHS Directive 2011/65/EU
• CSA/NRTL/C (Class I, Division 1, Groups A, B, C, D)
• ATEX/IECEx (Ex ia IIC T3 Ga / Ex ec IIC T3 Gc)