Product Overview
The Bently Nevada 3500/40-01-02 is a 3500/40M Proximitor Monitor designed for high-precision monitoring of shaft vibration and
position in critical rotating machinery. It is part of the 3500 Series Monitoring System, providing reliable vibration monitoring and protection for
turbines, compressors, and generators.

Key Features
High-precision monitoring of shaft vibration and position
Compatible with 3500 Series Monitoring Systems
Accepts signals from 3300 XL and NSv proximity probes
Advanced signal processing for precise vibration detection
Robust industrial-grade construction
Technical Specifications
| Specification | Details |
|---|
| Model | 3500/40-01-02 |
| Type | 3500/40M Proximitor Monitor |
| Input Signal Type | Proximity probe (eddy-current) |
| Output Signal Type | Analog and digital vibration signals; Keyphasor output |
| Power Requirements | 24 VDC ±10% |
| Operating Temperature | 0 °C to +70 °C |
| Storage Temperature | –40 °C to +85 °C |
| Mounting | 19-inch rack mount compatible |
| Signal Processing | High-speed digital processing for accurate monitoring |
| Dimensions | 241.3 x 24.4 x 241.8 mm |
| Weight | 0.91 kg |
These sensors are used to monitor the casing vibration of large and
medium-sized rotating machinery, including steam turbines, water
turbines, fans, compressors, turboexpanders, motors and generators,
exciters, gearboxes, water pumps, etc. They are widely applied in
industries such as electric power, petroleum, chemicals, and
metallurgy, as well as in some scientific research institutions.
The Accelerometer 200150 is exclusively used with compatible
Transducer Interface Modules (TIMs) in the Trendmaster Pro
quasi-continuous online condition monitoring system. The specific
frequency response of this accelerometer is only suitable for
general application scenarios. When monitoring machines with
relatively slow rotational speeds, please use the 200155
accelerometer together with a properly configured proTIM. For
acceleration envelope applications, use the 200157 accelerometer
with a properly configured proTIM.
The piezoelectric sensing device in the 20015x series
accelerometers generates an electric charge when subjected to
vibration. The 20015x accelerometers are housed seismic sensors
suitable for general purposes, featuring a wide frequency range.
When used in conjunction with Trendmaster® proTIMs, these
accelerometers can convert the generated charge into a differential
voltage signal that is proportional to the acceleration parallel to
the sensor’s sensitive axis.
The 20015x accelerometers have a hermetically sealed, stainless
steel housing, making them highly robust and ideal for use in harsh
industrial environments. A 5-pin connector mounted on the top of
the sensor allows for easy installation and removal of
interconnecting signal cables. A 3/8-24 threaded hole at the bottom
of the sensor housing supports multiple mounting options.
The 200350 and 200355 accelerometers are housed vibration sensors
designed for general applications. They are used in combination
with Trendmaster Pro.
The low-frequency velocity sensor is specifically designed for
hydraulic applications to detect vibrations in stator cores, stator
frames, and bearing supports. Accessory housings, mounting kits,
and other accessories can protect your sensor system assets and
enable faster, more convenient installation.
This sensor measures absolute vibration in the frequency range of
0.5 Hz to 1.0 kHz. Its dual-wire design adopts moving-coil
technology and built-in signal conditioning circuitry to provide a
voltage output proportional to vibration velocity. The sensor is
used with the 3500/46M Hydraulic Monitor.
- Sensitivity: 20 mV/(mm/s) (508 mV/(in/s)) ±10%
The 330450 high-temperature accelerometer isolates the sensing
element from the signal conditioning electronics.
The 330400/330425 accelerometers are specifically designed for
measuring the acceleration of general-purpose casings and meet all
requirements of API 670.
The 190501 Velomitor® CT is a low-frequency sensor specifically
designed for monitoring cooling towers, capable of detecting
rotational speeds as low as 90 rpm.
These systems are intended for applications where the ambient
temperature is significantly higher than the operating range of
other Velomitor® sensors.
GE’s new Bentley Nevada radiation-resistant Velomitor® sensor is
specifically designed for the harsh environments of nuclear power
plants.
The 330525 Velomitor® XA is a rugged environmental piezoelectric
velocity sensor. It is an enhanced version of the 330500 Velomitor®
sensor, designed to meet NEMA 4X and IP65 ratings for applications
without an additional housing.
The 330500 Velomitor® is a general-purpose velocity sensor,
suitable for frequencies ranging from 4.5 Hz to 5000 Hz.
The Velomitor® 350900 is a high-temperature sensor for both
velocity and acceleration measurement. It is specifically designed
for use in gas turbines.