Bently Nevada 3500/50 134938-01 Tachometer Module
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8615305023276 | |||||||
| +8615305023276 | ||||||||
| 15305023276 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||

Product Overview
The Bently Nevada 3500/50 Tachometer Module (134938-01) is an advanced monitoring component in the Bently Nevada 3500 Machinery Protection System, designed for precise measurement of rotational speed, phase reference, and acceleration in critical rotating machinery.
It receives input signals from various transducers such as magnetic pickups, proximity probes, or TTL sensors, converting them into accurate speed and phase data used for protection and condition monitoring. The module can be configured for multiple machine types and integrates seamlessly with the 3500 rack and system communications.
Key Features
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Dual-channel tachometer monitor supporting redundant configurations.
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Measures speed, phase angle, and acceleration.
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Accepts input from Keyphasor®, magnetic pickup, or TTL-type sensors.
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Configurable alarm setpoints for overspeed and underspeed protection.
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Provides 4–20 mA, relay, and system digital outputs.
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Hot-swappable module design for easy maintenance.
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Full compatibility with Bently Nevada’s System 1® for data visualization.
Technical Specifications
| Parameter | Specification | Description |
|---|---|---|
| Model Number | 134938-01 | 3500/50 Tachometer Front Module |
| Function | Measures shaft rotational speed, phase, and acceleration | Used in critical rotating equipment monitoring |
| Number of Channels | 2 channels | Independent measurement per channel |
| Input Types | Magnetic pickup, proximity probe, TTL sensor | Sensor connected via rear I/O module |
| Input Frequency Range | 0.016 Hz – 20 kHz | Supports wide range of machine speeds |
| Input Voltage Range | ±24 V peak (max) | Compatible with AC or DC coupled inputs |
| Accuracy | ±0.1% of full scale | High precision for speed measurement |
| Outputs | 4–20 mA (per channel), relay, digital system output | Connects to 3500 rack backplane |
| Alarm Levels | 2 per channel (Alert and Danger) | User-configurable thresholds |
| Power Consumption | < 5 W | Typical operating power |
| Operating Temperature | −30 °C to +65 °C | Industrial temperature range |
| Storage Temperature | −40 °C to +85 °C | Safe non-operating range |
| Humidity | 95% non-condensing | Suitable for industrial environments |
| Mounting | 3500 rack slot | Requires matching rear I/O module |
| Dimensions (H × W × D) | 241.3 mm × 24.4 mm × 163.1 mm (9.50 in × 0.96 in × 6.42 in) | Standard Bently Nevada rack module size |
| Weight | Approx. 0.35 kg (0.77 lb) | Lightweight aluminum body |
| Housing Material | Aluminum alloy with protective coating | Corrosion-resistant design |
| Compliance | CE, CSA, ATEX (as part of the 3500 system) | Meets global safety standards |
| Country of Origin | United States (Minden, Nevada – USA) | Manufactured by Bently Nevada, Baker Hughes |
Bently Nevada 3500/50 134938-01 Tachometer Module is in stock. Please contact us for a quick quote and competitive pricing.
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8615305023276 | |||||||
| +8615305023276 | ||||||||
| 13950166376 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Company Introduction
Xiamen Shengruite Trading Co., Ltd. is a company specializing in the supply of industrial PLC spare parts.
We provide high-quality PLC spare parts to customers in the global manufacturing, energy and power, chemical and other fields.
Since its establishment in 2011, after 13 years of rapid development, the cumulative global shipments have reached 223,650 pieces, with an annual output value of US$50 million.
Successfully served more than 500 customers in more than 100 countries and regions including Saudi Arabia, UAE, the United States, Europe, Africa, and Southeast Asia
Our Mission
Provide customers with the best quality PLC spare parts and the fastest delivery service to ensure that their industrial automation systems are always in the best operating condition.
We provide a 1-year warranty service, and we support returns and exchanges for any issues to ensure your rights and interests are fully protected.
We can provide detailed product images upon request, and our team can arrange warehouse photos for confirmation to ensure you have all the information you need before making a purchase.
Shipping times vary depending on your location. With the support of our 16 global warehouses, we strive to deliver orders as quickly as possible. Contact us to get an estimated delivery time for your specific location.
The minimum order quantity (MOQ) is typically one unit. However, for larger orders, please contact us for potential discounts and pricing details.
Yes, we offer competitive pricing for bulk purchases. Please reach out to our sales team with the specifics of your order to receive a custom quote.
We accept various payment methods for wholesale orders, including bank transfers (T/T), letters of credit, and other options upon agreement. For large transactions, please contact us directly for payment terms.
Yes, we offer flexible ordering options for both small and large quantities. Whether youre looking for a single unit or a large batch, we can accommodate your needs.
We occasionally offer promotional discounts for new wholesale customers. Contact us to learn more about any current offers available for first-time buyers.
If you are unsure of compatibility with your existing setup please provide your system details and our support team can verify compatibility prior to purchase.
Returns are accepted within 30 days if the product is unused, unopened, and in its original packaging. Please note that return shipping and associated costs are the buyer\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’s responsibility.
Yes, we offer technical support for the installation and integration of our products. Our team can assist with setup, configuration, and troubleshooting to ensure a smooth installation.









