{"product_id":"bently-nevada-990-04-70-02-05-990-vibration-transmitter","title":"Bently Nevada 990-04-70-02-05 990 Vibration Transmitter","description":"\u003ch2\u003eProduct Introduction\u003c\/h2\u003e\u003cp\u003eWhen machinery vibration exceeds safe limits, the \u003cstrong\u003eBently Nevada 990-04-70-02-05\u003c\/strong\u003e provides critical early warning. This 990 Vibration Transmitter accepts one non-contacting 3300 NSv Proximity Probe and delivers a 4-20 mA signal proportional to full-scale range. Designed for hazardous environments, it includes CSA Division 2, ATEX Zone 0\/2, and ABS maritime approvals. The \u003cstrong\u003e990-04-70-02-05\u003c\/strong\u003e is built for continuous, reliable operation in demanding industrial settings.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput\u003c\/td\u003e\n\u003ctd\u003eAccepts 1 non-contacting 3300 NSv Proximity Probe and extension cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e+12 to +35 Vdc at transmitter terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003e4-20 mAdc over specified full-scale range (2-wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoop Accuracy\u003c\/td\u003e\n\u003ctd\u003eWithin ±1.5% over full-scale range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Loop Resistance\u003c\/td\u003e\n\u003ctd\u003e1,000 Ω including cable at 35 Vdc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Limiting\u003c\/td\u003e\n\u003ctd\u003e23 mA typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e5 Hz to 6,000 Hz +0, 3 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe Gap\u003c\/td\u003e\n\u003ctd\u003e0.5 to 1.75 mm (20 to 55 mils)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Target Size\u003c\/td\u003e\n\u003ctd\u003e9.5 mm (0.375 in) diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.43 kg (0.9 lbm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eFailure Mode Analysis \u0026amp; Practical Benefits\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eBently Nevada 990-04-70-02-05\u003c\/strong\u003e excels in preventing undetected vibration events. Its \u003cstrong\u003eNOT OK\/signal defeat\u003c\/strong\u003e function forces the output below 3.6 mA within 100 µs after a fault, ensuring downstream systems recognize the problem. The non-interacting zero and span adjustments allow quick recalibration without cross-effects. Loop accuracy of ±1.5% (plus probe factor) provides reliable data for predictive maintenance.\u003c\/p\u003e\u003ch2\u003eApplication Examples\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump monitoring:\u003c\/strong\u003e Detect bearing wear and imbalance in centrifugal pumps using the 0-4 mils pp full-scale.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFan and blower systems:\u003c\/strong\u003e The 5 Hz to 6 kHz response captures both low-speed and high-frequency vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompressor protection:\u003c\/strong\u003e In ATEX Zone 2 environments, the transmitter provides continuous 4-20 mA signals to trip systems before damage occurs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eMount the \u003cstrong\u003eBently Nevada 990-04-70-02-05\u003c\/strong\u003e using the bulkhead screws (Mouting Option 02). Ensure the 3300 NSv probe gap is set between 0.5 and 1.75 mm from the target. Use extension cable up to 3 meters (10 feet) from the Proximitor Sensor Output (BNC connector). Apply +12 to +35 Vdc at the transmitter terminals; maximum loop resistance is 1,000 Ω at 35 Vdc. Verify zero and span with the non-interacting adjustments after installation.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003ePeriodically check the probe gap and cable connections. The transmitter self-monitors; if the NOT OK condition triggers, investigate probe condition or power supply. After a fault clears, the output restores within 2-3 seconds. The ceramic-coated sensor target and robust enclosure withstand harsh industrial environments. Regular zero\/span verification ensures sustained accuracy.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing, confirm your probe type (3300 NSv) and system length (7.0 meters in this variant). The agency approval option 05 includes CSA Division 2, ATEX Zone 0\/2, and ABS maritime – verify compatibility with your area classification. For reliable sourcing, \u003cstrong\u003ePLC Source PRO\u003c\/strong\u003e (formerly ubest101) stocks genuine Bently Nevada modules with proven traceability.\u003c\/p\u003e","brand":"Bently Nevada","offers":[{"title":"Default","offer_id":44416583401571,"sku":"990-04-70-02-05","price":216.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.plcsourcepro.com\/products\/bently-nevada-990-04-70-02-05-990-vibration-transmitter","provider":"PLC Source PRO","version":"1.0","type":"link"}