330750-40 | Bently Nevada | High Temperature Velomitor System

The Bently Nevada 330750-40 High Temperature Velomitor System is designed for high-temperature environments, capable of withstanding surface temperatures up to +400°C (+752°F). This version surpasses previous models that were limited to +300°C (+572°F), offering enhanced performance in extreme conditions. The sensor head and cable are permanently connected, eliminating connectors to improve reliability in harsh environments.

This system includes an integrated cable that allows you to place the signal conditioning electronics in cooler areas, with the internal electronics able to function in temperatures from -55°C to +121°C (-67°F to +250°F). For environments requiring lower temperatures, the 330500 Velomitor is more suitable, supporting up to +121°C (+250°F).

Specifications

Electrical:

• Sensitivity: 5.7 mV/mm/s (145 mV/in/s) ±5%
• Frequency Response:
  • 15-2000 Hz (900 to 120,000 cpm) ±3.0 dB
  • 20-1000 Hz (1,200 to 60,000 cpm) ±0.9 dB
• Transient Temperature Sensitivity: 0.0762 mm/s/°C (0.003 in/s/°C)
• Amplitude Range:
  • 635 mm/s (25 in/s) peak below 680 Hz
  • 2940 m/s² (300 g) peak above 680 Hz
• Vibration Range: Reduces above 2 kHz
• Output Bias Voltage: -12 ±2.0 VDC
• Grounding: Case Isolated
• Maximum Cable Length: 305 meters (1000 feet) without signal degradation

Environmental Limits:

• Temperature Range:
  • Sensing Head: -55°C to +400°C (-67°F to +752°F)
  • Cable: -55°C to +400°C (-67°F to +752°F)
  • Electronics: -55°C to +121°C (-67°F to +250°F)
• Shock Survivability: 24,535 m/s² (2500 g) peak
• Humidity: 100% non-submerged; hermetically sealed case

Physical:

• Weight:
  • 2 meters: 635 g (1.4 lb)
  • 4 meters: 794 g (1.75 lb)
  • 6 meters: 953 g (2.1 lb)
  • 8 meters: 1,111 g (2.45 lb)
• Case: 300-series stainless steel
• Connector: 2-pin Mil-C-5015 receptacle, hermetically sealed

Special Notes:

• Safe when connected to an associated source with a reliable material limiting current and voltage.
• Operating temperature for electronics: -40°C to +100°C; for sensor and cable: -40°C to +400°C.
• Must be supplied from a Class II limited energy source.

Ordering Information:

Part Number: 330750-40

• A (Length): 40 (4 meters)

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• Address: Unit 601, Powerlong International Center, No. 1599 Luling Road, Siming District, Xiamen City, Fujian, China

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