Name: Bently Nevada TACH100 Digital Tachometer – Standalone Speed Indicator for Machines
SKU: TACH100
Price: 234.00 USD
Availability: InStock

Product details

Bently Nevada TACH100 Standalone Digital Tachometer

The TACH100 is a compact digital tachometer for speed indication.
Use it alone or with a permanent monitoring system as a remote indicator.
It powers a Proximitor sensor (-24 Vdc) and accepts external Keyphasor signals.

Technical Specifications

Brand & Model
- Brand: Bently Nevada
- Model: TACH100
- Type: Standalone Digital Tachometer
Inputs & Signal
- Signal: From any Bently Nevada Proximitor sensor
- Threshold: Automatic adjustment
- Hysteresis: 0.2 Vdc to 2.5 Vdc, field-adjustable
- Events Per Turn: 1 to 99, field-adjustable
Electrical Supply
- Voltage: 110-230 Vac, 50-60 Hz
- Fuse: 1.5 Amp, SB fuse
- Power Consumption: 1.01 W nominal (with 88888 display)
- Proximitor Power: -24 Vdc at 20 mA max
Display & Measurement
- Display Type: 6-digit LED, 7 segments, 13.2 mm (0.52 in) height
- Measurement Range: 1 to 999,999 rpm
- Resolution: 1 rpm
- Accuracy: ±0.015% of input speed displayed in RPM
- Display Hysteresis: 0.003% change needed for new output
Environmental Limits
- Pollution Degree: 2
- Installation Category: II
- Altitude: 2000 m max
- Operating Temperature: 0°C to +60°C (+32°F to +140°F)
- Storage Temperature: -40°C to +85°C (-40°F to +185°F)
- Relative Humidity: 95% max, non-condensing
Physical Size
- Height: 76.2 mm (3 in)
- Width: 139.7 mm (5.5 in)
- Depth: 149.1 mm (5.8 in)
- Weight: 1.13 kg (2.5 lb)
EMC Directives & Standards
- Radiated/Conducted Emissions: EN5501, Group 1 Class A
- ESD: IEC 61000-4-2, Criteria B
- Radiated Susceptibility: IEC 61000-4-3, Criteria A
- EFT: IEC 61000-4-4, Criteria B
- AC Power Surge: IEC 61000-4-5, Criteria B
- AC Power Flicker: IEC 61000-3-3, Criteria A
- RF Conducted: IEC 61000-4-6, Criteria A
- Voltage Interrupt/Dip: IEC 61000-4-11, Criteria B / A
- Standards: EN61000-6-4 (emission) & EN61000-6-2 (immunity)
- Certificate of Conformity: AE 72062927 0001
- Complies with Council Directive 89/336/EEC (EMC)

Expert Review – Why TACH100?

Reliable speed display for machines in remote locations.
Built-in power for Proximitor sensors – no extra supply needed.
Easy to install and adjust with field-configurable hysteresis and events per turn.
Wide measurement range (1 to 999,999 RPM) suits most rotating equipment.
Tested to strict EMC standards for industrial environments.

Applications

Speed indication at the machine when no permanent system exists.
Remote speed display for control rooms away from the machine.
Backup speed indicator alongside permanent monitoring systems.
Ideal for turbines, compressors, pumps, and generators.

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Frequently Asked Questions (FAQ)

Q: Can I use this tachometer with a 4-20 mA output?
A: No, TACH100 provides LED display only; no analog output.
Q: Does it require a separate power supply for the sensor?
A: No, it supplies -24 Vdc at 20 mA directly to the Proximitor sensor.
Q: What is the minimum speed it can measure?
A: The TACH100 measures down to 1 RPM with 1 RPM resolution.
Q: Can I connect it to a Keyphasor probe from a monitor rack?
A: Yes, it accepts signal and common wires from an externally-powered Keyphasor.
Q: How do I adjust hysteresis and events per turn?
A: Use the field-adjustable potentiometers and DIP switches inside the unit.