Bently Nevada 330100-50-05 3300 Proximitor Prox, 5 m, Approvals

330100-50-05: 3300 Proximitor Sensor, 5.0 m system, multiple approvals

The Bently Nevada 330100-50-05 is a 3300 Proximitor Sensor in a 5.0 m (16.4 ft) system length with the multiple approvals option. It is the version to quote when the site documents require the hazardous-area approvals that the manufacturer lists for the 3300 system, rather than the plain 330100-50-00.

Decoded from 330100-AXX-BXX, 50 is 5.0 m system length and 05 is the multiple approvals option.

330100-50-05 technical specifications

Signal path of the 330100-50-05

The sensor sends a radio-frequency drive to the coil in the probe tip and measures how a conducting target loads that coil. Its output is a negative dc voltage proportional to gap, 7.87 mV/µm (200 mV/mil), which carries both position (the dc level) and vibration (the ac component). The 330100 includes an integral isolation plate as its base, so no separate isolator plate is needed in the mounting.

330100-50-05 and the approvals listed for the 3300 system

The 3300 specification sheet lists CSA/NRTL/C approval for Exia Class I, Division 1, Groups A to D when installed with intrinsically safe zener barriers per drawing CA22000 or with galvanic isolators, and Class I, Division 2 without barriers, with T4A at Ta = 100 °C and T5 at Ta = 65 °C. It also lists BASEEFA/CENELEC EExia for Zones 0, 1 and 2 with barriers or isolators, and ExN for Zone 2.

The document is an older specification, so check the markings and certificate on the delivered unit and the project’s current approval requirement. Probes and extension cables in the chain should be ordered with the matching 05 option so that the entire system is consistent.

Related parts and family overview for 330100-50-05

The ordering table for the 3300 Proximitor Sensor has only two length codes, 50 and 90, and two agency codes, 00 and 05. Matching parts are the 3300 XL 8 mm probes (330101 to 330106 families), 3300 5 mm probes (330171, 330172) and the 3300 XL extension cable 330130. The XL Proximitor Sensor, 330180, is described as electrically and mechanically interchangeable with this non-XL sensor and recommended as best available technology, but mixing XL and non-XL parts limits performance to the non-XL specification.

Selection and ordering checklist for 330100-50-05

• State the approval requirement: CSA/NRTL/C, BASEEFA/CENELEC or other
• Confirm the barrier or isolator arrangement and drawing
• Order probe and extension with option 05 where available
• Confirm 5.0 m total length
• Confirm whether the XL sensor 330180-50-05 equivalent is acceptable on the project
• Request marking or certificate copies for the loop file

Installation, commissioning and maintenance of the 330100-50-05

Install to the manufacturer drawing for intrinsically safe or Division 2 circuits and observe the supply limits of -17.5 to -26 Vdc at 12 mA. Barriers reduce available supply voltage, so measure at the sensor terminals.

Document barrier type and loop parameters. After installation verify the gap voltage and dynamic signal and keep the record as a baseline.

• Do not mix approved and non-approved probes in one loop without engineering review
• Inspect barrier grounds regularly
• Store spares with the same option 05
• Tight connections prevent signal noise
• Protect connectors in damp plants

Typical applications in Oman and the GCC

The 330100-50-05 belongs to classified-area machinery in Oman and the GCC, such as gas compressors and turbines in oil and gas gathering, refinery and petrochemical units where proximity signals pass through barriers. It is also used as an approved-sensor spare for older 3300-based protection racks whose approvals documentation names the 05 build.

Performance data from the 3300 system specification

Bently Nevada specification 141605-01 gives the following typical figures for a 3300 system built around the 330100 Proximitor Sensor with a 3300 XL 8 mm or 3300 5 mm probe: a linear range of 2 mm (80 mils) that begins about 0.25 mm (10 mils) from the target, a recommended gap setting of 1.27 mm (50 mils), an incremental scale factor of 7.87 mV/µm (200 mV/mil) ±6.5%, and a frequency response of 0 to 6.5 kHz (+0, −3 dB) with up to 305 m of field wiring. Proximitor sensors leave the factory calibrated to AISI 4140 steel; calibration to other target materials is available on request. The recommended minimum shaft diameter is 76.2 mm (3 in), because smaller shafts generally change the scale factor. When XL and non-XL parts are mixed, system performance is limited to the non-XL 3300 specification.

Information to send with an RFQ for 330100-50-05

• Part number 330100-50-05 and quantity
• Approval scheme and area classification
• Probe and extension part numbers with approval options
• Barrier or isolator type
• Delivery location in Oman or the GCC and required date

Documents and quotation

Send the part number 330100-50-05 and we will confirm which manufacturer documents are available for it.

Where the project needs proof of approvals, tell us when requesting a quotation. Seven Star LLC is an independent supplier based in Muscat; submit the part number, quantity and delivery location and we reply with availability and a quotation.