990-08-70-01-01 | Two-wire Vibration Transmitter – Bently Nevada

Overview

The Bently Nevada 990-08-70-01-01 vibration transmitter monitors machinery health with 3300 NSv Proximity Probes. It delivers 4–20 mA signals for real-time data and mounts on 35 mm DIN rails. CSA Div 2 certified for hazardous areas, it measures 0–8 mils vibration. Optional COO available. Built in the USA for harsh environments.

Technical Specifications

• Brand: Bently Nevada
• Model: 990-08-70-01-01
• Model Code:
  • 08: 0–8 mils (0–200 µm) full-scale range
  • 70: 7.0 m (23 ft) system cable length
  • 01: 35 mm DIN rail clips
  • 01: CSA Div 2 approval
• Power Input: +12 to +35 Vdc
• Output Signal: 4–20 mA (2-wire loop)
• Accuracy: ±1.5% of full scale at 250 Ω load
• Probe Gap: 0.5–1.75 mm (20–55 mils)
• Fault Response: <3.6 mA within 100 µs
• Recovery Time: 2–3 seconds after fault clearance
• Frequency Range: 5 Hz–6 kHz (±3 dB)
• Min Target Size: 9.5 mm (0.375″) diameter
• Max Probe Cable: 3 m (10 ft)
• Loop Resistance: 1,000 Ω at 35 Vdc
• Current Limit: 23 mA (typical)
• Weight: 0.43 kg (0.9 lb)
• Operating Temp: -40°C to +85°C (-40°F to +185°F)
• Ingress Protection: IP65 (dust/water resistant)
• Housing Material: Anodized aluminum
• EMC Compliance: EN 61326-1

Key Features

• CSA Div 2 certification for hazardous zones
• Tool-free DIN rail mounting
• Auto-reset after fault clearance (2–3 sec)
• IP65 rating for harsh environments
• ±0.5% annual stability
• 28 Vdc optimized power supply
• 1,000-hour MTBF (tested)

For more detailed information:990 Vibration Transmitter Datasheet