Description

Manufacturer: Bently Nevada

Product Number: 991-25-50-03-00

Product Type: Probe Vibration Transmitter (Thrust Monitoring)

Made in: U.S.A

Model Breakdown:

  • Model: 991 = Thrust Transmitter
  • Full-Scale Option: -25 = 25-0-25 mils
  • System Length: -50 = 5.0 meters (16.4 feet)
  • Mounting Option: -03 = DIN clips and screws
  • Approval Option: -00 = No agency approvals

Key Features:

  • Mount: DIN rail
  • Signal Output: 4-20 mA current loop
  • Power Supply: +12 to +35 Vdc at the terminal
  • Input: Works with one 3300 NSv proximity probe and extension cable

Measurement Performance:

  • Linear Output Range: 0.25 to 1.65 mm (Prox Out)
  • Loop Range: Suitable for 0.6-0-0.6 mm or 25-0-25 mils
  • Loop Accuracy: ±1.5% (typical over full range)
  • Max Loop Resistance: 1,000 Ω (at 35 Vdc)
  • Current Limit: 23 mA typical
  • Adjustments: Zero and span (external, non-interacting)

Signal Integrity:

  • Not OK Trigger: Signal drops to <3.6 mA in 100 µs
  • Recovery Time: Signal returns in 0.1 seconds after condition clears

Environmental Ratings:

  • Operating Temperature: -35°C to +85°C (-31°F to +185°F)
  • Storage Temperature: -51°C to +100°C (-60°F to +212°F)
  • Unit Weight: 0.43 kg (0.9 lb)

Download PDF file here:991 Thrust Transmitter Datasheet – 141618

Additional information

Weight0.82 kg
Dimensions15 × 7 × 6 cm

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