Product Overview

The Bently Nevada 16925-17 is a specialized high-temperature interconnect solution designed for the 330450 HTAS (High-Temperature Accelerometer System) series. This component is engineered to bridge the gap between extreme-heat sensing environments and standard signal conditioning electronics. By utilizing a segregated architecture, the 16925-17 allows the piezoelectric sensing head to be mounted directly on surfaces reaching +400°C (+752°F), while the sensitive electronics remain protected in a cooler ambient zone. This permanent hardline cable interface eliminates traditional connector failures at the sensor head, ensuring consistent vibration data transmission in the most punishing thermal conditions found in industrial power plants and heavy processing facilities.

Critical Hardware Metrics & Environmental Ratings

The following specifications detail the rugged construction and performance limits of the 16925-17 assembly:

• System Series: 330450 HTAS Compatible

• Sensor Type: High-Temperature Piezoelectric Accelerometer Link

• Signal Sensitivity: 100 mV/g

• Frequency Response: 10 Hz to 1000 Hz

• Maximum Surface Temperature: +400°C (+752°F)

• Cable Construction: Mineral-insulated hardline with 316 Stainless Steel

• Connector End: MIL-C-5015 standard interface

• Shipping Weight: 0.06 kg

• Physical Dimensions: 112 x 1.5 x 1.2 cm

• Certification Compliance: ATEX/IECEx Intrinsic Safety rated

• Manufacturing Origin: USA

Industrial Deployment Scenarios

The 16925-17 is the primary choice for condition monitoring in zones where conventional vibration sensors would suffer thermal degradation. Common applications include:

• Gas Turbine Casings: Monitoring high-frequency vibration on aero-derivative and industrial gas turbines where surface temperatures exceed the limits of standard PVC or Teflon cables.

• Steam Turbine Exhaust Hoods: Providing reliable data in high-heat, high-humidity environments to detect early bearing wear or rotor unbalance.

• Petrochemical Furnaces: Linking sensors on high-heat induction fans and blowers to remote monitoring racks.

• Hazardous Area Monitoring: Utilizing its ATEX/IECEx ratings to safely monitor critical assets in explosive atmospheres within refineries and chemical plants.

FAQ

Q: How does the 16925-17 handle temperatures as high as 400°C?

A: The cable utilizes mineral insulation and a 316 stainless steel sheath rather than polymer-based jackets. This allows the hardline portion of the assembly to remain thermally stable without melting or shorting.

Q: Is this cable detachable from the 330450 sensing head?

A: No, the 16925-17 is designed as a permanent hardline interconnect to maximize reliability. Eliminating the connector at the sensing head removes the most frequent point of failure in high-temperature vibration monitoring.

Q: Can I get a 4-20 mA output directly from this cable?

A: The 16925-17 transmits raw vibration signals to the signal conditioning electronics. The output format (raw signal or 4-20 mA) is determined by the specific 330450 series electronics module connected at the cooler end.

Q: What is the benefit of the MIL-C-5015 connector on this assembly?

A: The MIL-C-5015 connector provides a robust, military-grade threaded interface at the electronics end, ensuring that field wiring remains secure even in the presence of high-frequency mechanical vibration.

Q: Does the 16925-17 support seismic velocity measurements?

A: While part of the 16925 family, this specific -17 variant is optimized for the HTAS accelerometer system. For seismic velocity applications, a different cable configuration within the 16925 series is typically required.