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- Bently Nevada
- 3500/50M 133388-02
- Tachometer Module
- USA
- 241.3 × 24.4 × 241.8 mm
- 0.82kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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📘 Product Overview – Bently Nevada 3500/50M 133388-02
The Bently Nevada 3500/50M 133388-02 is a dual-channel tachometer module used for real-time speed, acceleration, and direction monitoring of rotating machinery. It’s part of the well-established 3500 Series of machinery protection systems, widely used in industries such as oil & gas, power generation, and chemical processing.
This module captures shaft rotational speed using signals from proximity probes or magnetic pickups, detects direction of rotation, and supports zero-speed and reverse rotation alarms. Additionally, it delivers conditioned Keyphasor outputs to synchronize with other modules in the rack, making it essential for comprehensive machinery monitoring.
🏷️ Brand & Series
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Brand: Bently Nevada
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Series: 3500 Machinery Protection Series
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Product Type: Tachometer Module (Dual Channel)
📐 Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | 3500/50M 133388-02 |
| Function | Tachometer Module (Speed, Acceleration, Direction Monitoring) |
| Input Channels | 2 |
| Supported Sensors | Proximity Probes, Magnetic Pickups |
| Keyphasor Output | Yes (Conditioned Keyphasor signal to backplane) |
| Alarm Functions | Overspeed, Underspeed, Zero Speed, Reverse Rotation, Acceleration Alarms |
| Peak Hold | Yes (Stores Max Speed, Reverse Count, Resettable) |
| Power Supply | Via 3500 Rack Backplane |
| Operating Temp. | –30°C to +65°C |
| Storage Temp. | –40°C to +85°C |
| Humidity Range | 0% to 95% non-condensing |
| Mounting | Full-height module for 3500 Rack |
| Configuration | 3500 Configuration Software |
| Dimensions (mm) | 241.3 × 24.4 × 241.8 |
| Weight (kg) | 0.82 kg |
| Certifications | CE Compliant, API 670 Capable, Hazardous Location Approved (Model-Dependent) |
⚙️ Product Applications
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Turbomachinery speed monitoring
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Gas and steam turbine shaft rotation analysis
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Motor-driven equipment protection
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Zero-speed confirmation for safe shutdowns
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Reverse rotation detection in compressors and pumps
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Acceleration tracking during ramp-up sequences
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Conditioned Keyphasor output for vibration syncing
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Integration with emergency shutdown systems (ESD)
✅ Product Advantages
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Dual-channel capability: Enables monitoring of two rotating elements or redundancy.
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Versatile sensor support: Works with both magnetic pickups and proximity probes.
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Keyphasor output included: Eliminates the need for additional synchronization hardware.
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Built-in alarms: Multiple alarm conditions supported, including zero speed and reverse.
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Rugged industrial design: Wide temperature and humidity tolerance for tough environments.
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Compact and lightweight: Saves space in the 3500 rack with just 0.82 kg of weight.
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Field-configurable: Easy to program using Bently Nevada’s configuration software.
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Peak hold feature: Captures max speed or event data for diagnostics.
🔁 Related Models – Same Series / Adjacent Functions
| Model Number | Function | Channels | Sensor Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 3500/50 133388-01 | Tachometer (Earlier Version) | 2 | Proximity, Magnetic | 241.3×24.4×241.8 | 0.80 |
| 3500/50M 140734-04 | Enhanced Tachometer Variant | 2 | Proximity, Magnetic | 241.3×24.4×241.8 | 0.82 |
| 3500/61 164730-01 | Phase and Speed Module | 2 | Keyphasor, Pulse Sensors | 241.3×24.4×241.8 | 0.78 |
| 3500/60 133819-01 | Speed & Phase Module | 2 | Speed Sensors | 241.3×24.4×241.8 | 0.76 |
| 3500/80 177230-01 | Overspeed Detection Module | 1 | Speed Input | 241.3×24.4×241.8 | 0.79 |
⭐ Top Models from Same Brand
| Model Number | Function | Channels | Sensor Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 3500/22M | Transient Data Interface | 4 | Dynamic Input | 241.3×24.4×241.8 | 0.75 |
| 3500/45 135137-01 | Position Monitor | 2 | LVDT / Proximity | 241.3×24.4×241.8 | 0.78 |
| 3500/33 149992-01 | Temperature Monitor | 4 | Thermocouple / RTD | 241.3×24.4×241.8 | 0.72 |
| 3500/60 133819-01 | Speed / Phase Monitor | 2 | Pulse / Magnetic Pickup | 241.3×24.4×241.8 | 0.76 |
| 3500/25 125800-01 | Keyphasor Module | 1-2 | Proximity Probes | 241.3×24.4×241.8 | 0.74 |
❓ FAQ – Bently Nevada 3500/50M 133388-02
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Q: What is the primary function of the 3500/50M 133388-02?
A: It is a tachometer module used to monitor speed, acceleration, and rotation direction of rotating machinery. -
Q: How many channels does it support?
A: The module supports two fully independent input channels. -
Q: What sensors are compatible with this module?
A: It supports proximity probes and magnetic pickups. -
Q: Can it output a Keyphasor signal?
A: Yes, it delivers a conditioned Keyphasor signal to the rack backplane. -
Q: Does it include speed-based alarm settings?
A: Yes, it supports alarms for overspeed, underspeed, zero speed, reverse, and acceleration. -
Q: Can I monitor two separate machines with this module?
A: Yes, if the machines are electrically isolated, each channel can monitor an independent shaft. -
Q: What are the physical dimensions of the module?
A: The module measures 241.3 mm × 24.4 mm × 241.8 mm. -
Q: What is the approximate weight of the module?
A: It weighs approximately 0.82 kilograms. -
Q: Is this module suitable for harsh environments?
A: Yes, it operates in a wide temperature range and tolerates high humidity. -
Q: How is this module configured?
A: Configuration is done using the 3500 Rack Configuration Software.