描述
Bently Nevada 88984-02产品详情解析
（涡流式位移传感器，适用于旋转机械状态监测）
一、产品概述
型号：88984-02
品牌：Bently Nevada（贝克休斯旗下，工业状态监测领域领导者）
类型：涡流式位移传感器（Eddy Current Proximity Probe）
核心功能：
非接触式测量旋转机械（如汽轮机、压缩机、发电机）的轴向位移、径向振动、轴心轨迹等关键参数。
实时监测转子与轴承、密封件的间隙变化，预防设备故障（如不平衡、不对中、轴承磨损）。
支持与Bently Nevada 3300/3500监测系统、System 1软件或第三方控制系统（PLC/DCS）集成。
二、工作原理
涡流效应：
探头内部线圈通高频交流电，产生交变磁场。
当金属靶面（如转子）靠近时，磁场在靶面中感应出涡流，导致探头线圈阻抗变化。
信号转换：
前置器检测阻抗变化，将其转换为与间隙成比例的电压信号（如-24V DC对应0mm，0V DC对应最大量程）。
输出标准信号：
电压输出（-24V至0V DC）或4-20mA电流信号（需配置电流输出模块）。
三、技术参数
参数类别详细规格
量程0.25mm、0.5mm、1mm、2mm、5mm、10mm、25mm（可选，88984-02常见量程为1-5mm）
线性范围典型量程的80%（如2mm量程线性范围为0-1.6mm）
灵敏度8mV/μm（典型值，依量程调整）
频率响应0Hz至10kHz（-3dB带宽，部分型号可扩展至20kHz）
非线性度≤±1%全量程
温度稳定性灵敏度温度系数<0.05%/℃
工作温度探头：-50℃至+200℃（依型号配置）
前置器：0℃至+65℃
防护等级探头：IP68（防尘防水）
前置器：IP54（防尘防溅）
抗干扰能力符合IEC 61000 EMC标准，抗射频干扰（RFI）和电磁干扰（EMI）
供电要求前置器：24V DC±10%
连接方式探头与延伸电缆：M10×1螺纹
延伸电缆与前置器：航空插头或DIN连接器
认证标准ATEX、IECEx（防爆认证，适用于危险区域）
CE、UL、cUL等安全认证
Bently Nevada 88984-02 Product Details
(Eddy Current Proximity Probe for Rotating Machinery Condition Monitoring)
I.Product Overview
Model:88984-02
Brand:Bently Nevada(a subsidiary of Baker Hughes,a leader in industrial condition monitoring)
Type:Eddy Current Proximity Probe
Core Functions:
Non-contact measurement of key parameters such as axial displacement,radial vibration,and shaft centerline trajectory of rotating machinery(such as turbines,compressors,and generators).
Real-time monitoring of clearance changes between rotors,bearings,and seals helps prevent equipment failures(such as imbalance,misalignment,and bearing wear).
Integrates with the Bently Nevada 3300/3500 Monitoring System,System 1 software,or third-party control systems(PLC/DCS).
II.Operating Principle
Eddy Current Effect:
A high-frequency alternating current flows through the probe’s internal coil,generating an alternating magnetic field.When a metal target surface(such as a rotor)approaches,the magnetic field induces eddy currents in the target surface,causing the probe coil impedance to change.
Signal Conversion:
The preamplifier detects this impedance change and converts it into a voltage signal proportional to the gap(e.g.,-24V DC corresponds to 0mm,and 0V DC corresponds to the maximum range).
Standard Output Signal:
Voltage output(-24V to 0V DC)or 4-20mA current signal(requires a current output module).III.Technical Parameters
Parameter Category Detailed Specifications
Measuring Range:0.25mm,0.5mm,1mm,2mm,5mm,10mm,25mm(optional;the most common range for the 88984-02 is 1-5mm)
Linear Range:80%of the typical measuring range(e.g.,a 2mm range has a linear range of 0-1.6mm)
Sensitivity:8mV/μm(typical,adjusted by range)
Frequency Response:0Hz to 10kHz(-3dB bandwidth,extendable to 20kHz for some models)
Non-Linearity:≤±1%of full scale
Temperature Stability:Sensitivity Temperature Coefficient:<0.05%/°C
Operating Temperature:Probe:-50°C to+200°C(depending on model)
Proximitor:0°C to+65°C
Protection Rating:Probe:IP68(dust and water-resistant)
Proximitor:IP54(dust and splash-proof)
Interference Immunity:Complies with IEC 61000 EMC standards,immunity to radio frequency interference(RFI)and electromagnetic interference(EMI)
Power requirements:Proximitor:24V DC±10%
Connection:Probe and extension cable:M10 x 1 threaded
Extension cable and Proximitor:Aviation plug or DIN connector
Certifications:ATEX,IECEx(explosion-proof,suitable for hazardous areas)
CE,UL,cUL,and other safety certifications
ABB Model: GBU72 3BHE055094R0002 Model: 3BHE055094R0002 GBU72 Model: GBU72 Model: 3BHE055094R0002 Model: 3BHE031197R0001 Model: 3BHB030310R0001 Model: 73BHE055094R0002 GBU72 Model: 73BHE055094R0002 Model: GBU72 Model: ABB PCS6000 PRODUCT FAMLIY ABB 5SHY4045L0006 3BHB030310R0001 3BHE039203R0101 GVC736CE101
