BENTLY 330703-000-070-10-02-05

Description

Detailed parameter table

BENTLY 330703-000-070-10-02-05

Product introduction

The 330703-000-070-10-02-05 from Bently Nevada is a high-performance high-temperature accelerometer, engineered to provide precise vibration measurement in extreme thermal environments where standard accelerometers would degrade. As a specialized member of Bently Nevada’s 3300 series, this sensor combines piezoelectric technology with robust construction to deliver reliable acceleration data for critical machinery health monitoring.

Designed to operate in temperatures up to 177°C, the 330703-000-070-10-02-05 directly measures vibration acceleration and converts it to a standardized 4-20mA output, eliminating the need for external signal conditioning in high-heat areas. Its rugged Inconel housing and extended 7m cable make it ideal for monitoring turbine bearings, exhaust fans, and high-temperature process pumps. When paired with calibration tools like the 128240-01 for periodic verification and termination panels such as the 146031-02, it forms a complete monitoring solution for harsh industrial environments.

Core advantages and technical highlights

Extreme temperature operation: The 330703-000-070-10-02-05 excels in high-temperature environments, maintaining measurement accuracy from -54°C to 177°C—far exceeding the capabilities of standard accelerometers. Its Inconel housing and high-temperature internal components resist thermal degradation, ensuring reliable performance near turbine casings, exhaust manifolds, and process equipment where heat would compromise conventional sensors. This thermal stability eliminates measurement drift that could mask early machinery faults.

Integral signal conversion: Unlike charge-output accelerometers requiring external amplifiers, this sensor features an integral charge converter that directly produces a 4-20mA output proportional to acceleration. This integrated design simplifies system architecture, reduces wiring complexity, and eliminates signal loss that can occur with remote amplifiers. The 4-20mA signal is inherently noise-resistant, ensuring measurement integrity over the 7m cable length in electrically noisy environments.

High-g measurement capability: With a ±50g measurement range, the 330703-000-070-10-02-05 captures both routine vibration and transient shock events, making it suitable for monitoring machinery with potential for high-amplitude vibrations. This wide range ensures detection of both subtle bearing defects (low-g) and catastrophic events (high-g), providing comprehensive protection for critical equipment. The sensor maintains ±5% sensitivity accuracy across its entire range and temperature spectrum.

Industrial durability: The hermetically sealed Inconel housing provides exceptional resistance to moisture, dust, and chemical contamination, with an IP67 rating for environmental protection. The sensor withstands mechanical shock up to 10,000g and vibration up to 50g, ensuring survival in harsh industrial conditions. The integral shielded cable features high-temperature insulation and strain relief, preventing cable failure in high-vibration applications.

Verification compatibility: Designed for easy performance verification using the 128240-01 calibration tool, the sensor allows on-site accuracy checks without removal from operating machinery. This compatibility supports preventive maintenance programs by enabling periodic verification of measurement integrity, ensuring that vibration data remains trustworthy for both condition monitoring and machinery protection decisions.

Typical application scenarios

In gas turbine power plants, the 330703-000-070-10-02-05 is installed on turbine exhaust bearings and auxiliary combustion equipment, where operating temperatures often exceed 150°C. The sensor’s high-temperature capability captures critical vibration data from these heat-exposed components, while its 4-20mA output connects directly to the plant’s 1900/65A-01-01-01-00-00 controller for protection and monitoring. Maintenance teams use the 128240-01 tool quarterly to verify sensor accuracy without removing it from the high-temperature environment.

Within petrochemical refineries, the accelerometer monitors vibration on high-temperature process pumps and heater fans, where ambient temperatures and process heat create challenging measurement conditions. Its Inconel construction resists corrosion from hydrocarbon vapors, while the hermetic sealing prevents contamination. The 7m cable routes vibration data safely away from heat sources to 146031-02 termination panels in cooler control areas.

In steel manufacturing facilities, the 330703-000-070-10-02-05 provides vibration monitoring for rolling mill drives and furnace fans, operating near hot metal processing lines. The sensor withstands both the radiant heat and mechanical shock typical in these environments, providing reliable data on bearing health and drive train condition. Its compatibility with the 128240-01 allows quick verification during scheduled maintenance, ensuring measurement accuracy in these demanding applications.

BENTLY 330703-000-070-10-02-05

Related model recommendations

330703-000-070-10-02-10: A higher-range variant with ±100g measurement capability.

128240-01: Calibration verification tool for on-site performance checks of this accelerometer.

106M1081-01: Precision mounting adapter for secure installation in high-vibration areas.

146031-02: 32-channel termination panel for centralized connection of multiple sensors.

00E04600EFD8: High-temperature extension cable for extending sensor reach if needed.

125720-01: Signal conditioner for advanced processing of the accelerometer output.

1900/65A-01-01-01-00-00: Machinery protection controller that integrates with this sensor.

Installation, commissioning and maintenance instructions

Installation preparation: Before installing the 330703-000-070-10-02-05, select a mounting location within 150mm of the bearing housing on a rigid machine surface. Ensure the surface is clean, flat, and free of paint or corrosion to ensure proper vibration transfer. For high-temperature applications, verify the ambient temperature does not exceed 177°C. Plan cable routing to avoid direct contact with surfaces hotter than 200°C, using heat shields if necessary.

Mounting procedure: Secure the accelerometer using the 10-32 UNF stud, torquing to 2.5 Nm (22 in-lbs) for optimal vibration transfer. For temporary measurements, use the optional high-temperature magnetic base, ensuring full contact with the machine surface. Route the integral cable away from heat sources and moving parts, maintaining a minimum bend radius of 15mm. Connect the MIL-C-5015 connector to the monitoring system or termination panel, ensuring proper engagement of the locking mechanism.

Commissioning verification: After installation, use the 128240-01 calibration tool to verify sensor performance at the installation site. Attach the tool’s magnetic base adjacent to the sensor, generate known vibration levels across multiple frequencies, and confirm the accelerometer output matches the expected 4-20mA range. This verification ensures proper mounting and signal integrity before relying on the sensor for protection or monitoring.

Maintenance suggestions: Inspect the 330703-000-070-10-02-05 quarterly for signs of physical damage, loose mounting, or cable insulation degradation, particularly in high-heat areas. Verify mounting torque remains at specification, as vibration can loosen fasteners over time. Perform quarterly accuracy checks using the 128240-01 tool to detect calibration drift. Clean the sensor housing with a dry cloth if contaminated, avoiding harsh chemicals that could damage the Inconel surface.

Service and guarantee commitment

The 330703-000-070-10-02-05 is backed by a 2-year warranty covering defects in materials and workmanship under normal operating conditions. Bently Nevada’s global technical support team provides expert assistance for installation in high-temperature environments, application guidance, and troubleshooting, with 24/7 availability for critical system issues.

We offer specialized training on installing and verifying high-temperature accelerometers, including proper use of the 128240-01 for on-site verification. Calibration services are available to ensure measurement accuracy, with NIST-traceable certification. Technical documentation includes detailed installation drawings for high-temperature applications and compatibility guides for integration with monitoring systems. Backed by Bently Nevada’s expertise in extreme environment sensing, the 330703-000-070-10-02-05 delivers reliable vibration measurement performance in the most demanding industrial conditions.