Bently Nevada 990-05-70-01-05 Vibration Sensor Specifications
General Information
Manufacturer: Bently Nevada (now part of Baker Hughes)

Model Number: 990-05-70-01-05

Type: Seismic Velocity Sensor (Vibration Transducer)

Application: Measures casing or structural vibration in industrial machinery (turbines, compressors, pumps, etc.)

Electrical Parameters
Output Signal: Velocity (proportional to vibration velocity)

Sensitivity: 200 mV/in/s (typical) (7.87 mV/mm/s)

Measurement Range:

Velocity: 0 to 2 in/s (0 to 50.8 mm/s) peak

Frequency Response: 10 Hz to 1,000 Hz (±3 dB)

Output Impedance: ≤ 500 Ω

Bias Voltage: 8 to 12 VDC (required for proper operation)

Power Requirement: Typically 18 to 30 VDC (2-wire system with loop power)

Mechanical & Environmental Parameters
Mounting: 1/4-28 UNF threaded stud or adhesive mounting

Housing Material: Stainless steel

Operating Temperature: -40°C to +85°C (-40°F to +185°F)

Weight: ~ 0.5 lb (227 g)

Compliance & Certifications
ATEX / IECEx: Available for hazardous areas (if applicable)

CE / UL: Compliant with industry standards

Connector & Wiring
Connector Type: 2-pin MIL-C-5015 or integral cable

Polarity: Shielded cable (reverse polarity protected)

Typical Applications
Industrial Machinery Monitoring:

Gas & Steam Turbines

Compressors

Pumps

Fans

Gearboxes