330750-40 Bently Nevada, 330750 High Temperature Velomitor / Transducer

FAQ – Model 330750-40

Q1: What is the 330750-40 and what is it typically used for?

A:
The 330750-40 is a high-temperature velocity vibration sensor designed for casing-mounted vibration monitoring. It is commonly used on rotating machinery such as turbines, compressors, pumps, and other industrial equipment where surface temperatures exceed the limits of standard vibration sensors.

Q2: What does “-40” mean in the model number 330750-40?

A:
The “-40” indicates that the sensor is supplied with a 4-meter integrated hardline cable. This design allows the sensing element to remain in high-temperature zones while the electronics can be installed in a cooler and more accessible location.

Q3: What temperature range can the 330750-40 handle?

A:
The sensing head and integrated cable are suitable for installation on surfaces exposed to very high temperatures, up to 400°C.
The signal conditioning electronics are intended to be mounted remotely in an environment with significantly lower ambient temperatures, ensuring long-term stability and reliability.

Q4: What type of signal does the 330750-40 provide?

A:
The 330750-40 outputs a velocity-based vibration signal, which is widely used for evaluating overall machine condition. Velocity measurements are especially effective for identifying issues such as imbalance, misalignment, and mechanical looseness.

Q5: Is the 330750-40 suitable for continuous monitoring applications?

A:
Yes. The sensor is designed for continuous, long-term operation and provides stable output across the frequency range typically associated with rotating machinery. This makes it suitable for both protection and condition monitoring systems.

Q6: Can the 330750-40 be used in hazardous or classified areas?

A:
The 330750-40 is available with approvals suitable for use in hazardous locations. When properly installed and connected to approved intrinsically safe or non-incendive systems, it can be applied in classified industrial environments.

Q7: What monitoring systems is the 330750-40 compatible with?

A:
The 330750-40 can be integrated with vibration monitoring systems that accept two-wire velocity sensor inputs. Prior to installation, system compatibility regarding power supply and signal input characteristics should be confirmed.

Q8: How does the 330750-40 differ from standard Velomitor sensors?

A:
The key difference is temperature capability.
While standard velocity sensors are intended for moderate-temperature locations, the 330750-40 is specifically engineered for installations where elevated surface temperatures would otherwise limit sensor life or performance.

Q9: Are there any important installation considerations for the 330750-40?

A:
For best results, the sensor should be mounted on a rigid surface such as a bearing housing or machine casing. Proper mounting torque, surface preparation, and cable routing are essential to ensure accurate measurements and avoid signal distortion caused by poor mechanical coupling.

Datasheet Link:

330750-40 Bently Nevada, High Temperature Velomitor / Transducer PDF Datasheet