Description

21500‑00‑12‑10‑02 Eddy‑Current Proximity Probe

Technical Specifications

• Product Model: 21500‑00‑12‑10‑02
• Brand: Bently Nevada (GE)
• Warranty: One Year
• Input Voltage: Powered by external 3300 / 7200 series proximitor driver unit
• Operating Temperature: ‑20 °C ~ +200 °C
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: Frequency bandwidth 0.5 Hz‑12 kHz for shaft dynamic displacement sampling
• Protection Class: Hermetically sealed field‑mount probe assembly; stainless‑steel housing
• Accuracy Class: 7.87 V/mm nominal sensitivity; 5 mm linear measurement range
• Output Frequency: Not applicable; raw eddy‑current signal to proximitor
• Rated Current Range: Probe driven by proximitor module; no self‑power
• Communication Interface: Integral 12‑meter coaxial extension cable; miniature coaxial connector for proximitor mating
• Supported Protocols: Compatible with Bently Nevada 7200 series monitoring systems
• Overload Capacity: High temperature resistant; shielded coaxial cable for EMI rejection; no built‑in electronic protection
• Dimensions: 5 mm probe tip diameter; 12‑meter integral cable length

Product Overview

The 21500‑00‑12‑10‑02 is a 5 mm range eddy‑current non‑contact proximity probe for Bently Nevada 7200 machinery protection systems. It measures shaft radial vibration, thrust displacement and shaft eccentricity on turbomachinery and large rotating equipment. The probe detects clearance variation between probe tip and metallic shaft target, and sends high‑frequency raw signal via 12‑meter built‑in coaxial cable to matched proximitor module for signal conditioning and conversion.

This probe solves rotating‑equipment‑monitoring challenges: non‑contact long‑term shaft‑condition measurement, high‑temperature field‑location suitability, and drop‑in spare compatibility for legacy 7200 monitor racks. Hermetic sealed construction withstands harsh turbine‑compressor‑skid environments; shielded cable minimizes electromagnetic interference from high‑power equipment. Turbomachinery protection engineers, power‑plant and oil‑gas‑site maintenance technicians and machinery‑retrofit integrators benefit most. It applies to steam‑turbine, gas‑turbine and centrifugal‑compressor protection systems for refineries, natural‑gas compressor‑stations and power‑generation facilities.

Key Application Notes

• Must pair with matching 7200‑series proximitor; cannot output usable signal standalone
• 5 mm linear range, 12‑meter fixed integral coaxial cable, part of complete transducer chain
• Used for radial vibration, axial thrust position and shaft eccentricity monitoring
• Hermetically sealed stainless‑steel probe body for high‑temperature field‑installation
• Requires correct target material and proper probe‑gap setting during commissioning; gap‑voltage must be verified at commissioning
• Obsolete original production; available as aftermarket spare part for existing 7200 retrofit projects
• Full transducer system shall comply with API‑670 machinery‑protection installation standards