Bently Nevada TK81 Tunable Filter/Vibration Meter
The Bently Nevada TK81 is a tunable filter/vibration meter for Bently Nevada platforms. Input Impedance: 95 kΩ | Display: 4-line by 16-character LCD | Inputs: Accepts displacement, velocity, and acceleration transducers (does not provide power for them). Factory-sealed, live-rack tested, 48-hour burn-in. 12-month warranty. Ships within 24h.
Technical Specifications
| Product ID | TK81 |
|---|---|
| Type | Tunable Filter/Vibration Meter |
| Input Impedance | 95 kΩ |
| Display | 4-line by 16-character LCD |
| Inputs | Accepts displacement, velocity, and acceleration transducers (does not provide power for them) |
| Frequency Response | 1.66 Hz to 1,666 Hz (100 to 100,000 RPM) |
| Integration | Single integration available for frequencies above 10 Hz (600 RPM) |
| Filter Operating Range | 1.66 Hz to 1,666 Hz (100 RPM to 100,000 RPM) |
| Power Requirements | 9-Volt alkaline transistor battery (NEDA 1604A) |
| Battery Life | Approximately 20 hours |
| Operating Temperature | 0°C to +40°C (+32°F to +104°F) |
| Storage Temperature | -20°C to +70°C (-4°F to +158°F) |
| Relative Humidity | Up to 90% non-condensing |
| Height | 191 mm (7.5 in) |
| Width | 102 mm (4.0 in) |
| Depth | 58 mm (2.3 in) |
| Weight | 316 g (0.7 lb) |
| Manufacturer | Bently Nevada |
| Model / SKU | TK81 |
Ships within 24 hours | 12-Month Warranty | Worldwide Delivery
The Bently Nevada TK81 is a precision sensor for machinery protection. Sensor accuracy is critical — every alarm and trip decision starts with this signal. Product ID: TK81. Type: Tunable Filter/Vibration Meter. Input Impedance: 95 kΩ.
Bench-verified before shipping: scale factor, linearity, gap voltage measured against manufacturer specs. Printed test report included. Genuine Bently Nevada. 12-month warranty. Ships within 24h.
Genuine vs. aftermarket difference?
Genuine {vendor} sensors use proprietary coil winding and individually calibrated materials. Aftermarket clones can deviate 15-30% — enough to miss a fault or false-trip.
How do I verify compatibility?
Match the full part number. {vendor} encodes probe diameter, thread type, cable length, and connector style in the part number. Send a photo of your existing label for confirmation within 4h.
Pre-installation checks?
Inspect target surface for pitting or runout. Verify bracket rigidity. Set gap voltage with a meter before tightening. Verify output at the proximitor after installation.
Compatible Parts — Same System
These modules share the same system family as the TK81. Commonly ordered together for complete rack builds or spare parts kits.
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