Features:
- Extreme High-Temperature Operation up to +204°C
- Isolated Mounting Base for Signal Integrity
- Hazardous Area Approvals for Zone 0 and Zone 2
The Bently Nevada 74712-06-12-04-CN is specifically designed as the high-temperature version of the 9200 series, capable of continuous operation in ambient temperatures from -29°C to +204°C (-20°F to +400°F). This makes it the preferred choice for steam turbine casings, gas turbine compartments, and compressor bearing housings where standard sensors would quickly fail or provide inaccurate readings.
The Bently Nevada 74712-06-12-04-CN features an isolated circular mounting base with 1/2-20 UNF-2A threads. This isolation design physically decouples the sensor from spurious vibrations originating in the mounting surface or machine casing, ensuring that the output signal represents true absolute casing vibration. This feature is critical for accurate machinery diagnostics and protection system reliability.
The Bently Nevada 74712-06-12-04-CN carries full international certifications including CSA, ATEX, and IECEx, rated as Ex ia IIC T6 Ga for Zone 0 (intrinsically safe) and Ex ec IIC T6 Gc for Zone 2 (increased safety). When properly powered by a Class 2 or limited-energy circuit, this sensor can be installed directly in explosive atmospheres containing gases or dust, eliminating the need for external barriers or heavy enclosures.
The 74712-06-12-04-CN Bently Nevada High-temperature Two-wire Transducer may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 74712-06-12-04-CN High-temperature Two-wire Transducer Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 74712-06-12-04-CN High-temperature Two-wire Transducer
General
- Manufacturer Bently Nevada
- Model 74712-06-12-04-CN
- Condition New Original ready stock
- Product Family 74712-06-12-04-00,74712-06-12-04-BR,74712-06-12-04-RU
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Steam Turbine Casing Monitorin:The Bently Nevada 74712-06-12-04-CN is ideal for measuring absolute casing vibration on high-pressure and intermediate-pressure steam turbine sections where surface temperatures routinely exceed 150°C. Its high-temperature rating ensures long-term reliability in these thermal environments.
- Gas Turbine Bearing Housings:Gas turbine compartments present both high ambient heat and challenging mechanical access. The side-mount connector configuration of this sensor allows installation in tight spaces while maintaining a secure connection capable of withstanding continuous thermal cycling.
- Industrial Compressors (Centrifugal & Reciprocating):The moving-coil technology of the Bently Nevada 74712-06-12-04-CN offers excellent resistance to impulsive excitations caused by reciprocating compressor valve impacts or centrifugal compressor surge events, providing stable readings where solid-state sensors may momentarily saturate.
- Hot Gas Expanders & High-Temperature Fans:
Equipment handling process gases at elevated temperatures (e.g., FCC expanders in refineries, high-temperature induced draft fans) requires sensors that can survive both radiant and conducted heat. This sensor's silicone gasket and anodized aluminum housing provide robust protection in these extreme environments.
- Extreme High-Temperature OperationUnlike standard industrial sensors that fail above 121°C, the Bently Nevada 74712-06-12-04-CN operates continuously from -29°C to +204°C (-20°F to +400°F). The silicone gasket maintains sealing integrity across this entire range without becoming brittle or melting.
- Moisture and Dust Resistance:The sensor is designed for use in dusty and humid industrial environments. With the appropriate mating connector and cable, it can withstand non-submerged exposure to 100% relative humidity, making it suitable for outdoor installations, wash-down areas, and tropical climates.
- High-Altitude Installation:Certified for operation up to 2,000 meters (6,561 feet) above sea level, the Bently Nevada 74712-06-12-04-CN can be deployed on equipment located at high-altitude sites such as mines, wind farms, or mountain-pass compressor stations without derating.
- Shock and Vibration Survivability:The moving-coil construction can withstand 50 g peak acceleration shocks along non-sensitive axes. This ruggedness ensures the sensor survives mechanical events such as sudden rotor rubs, blade loss events, or shipping/handling drops that would damage fragile solid-state sensors.
- ATEX & IECEx Zone 0 (Intrinsic Safety)The Bently Nevada 74712-06-12-04-CN carries Ex ia IIC T6 Ga certification, allowing direct installation in Zone 0 explosive gas atmospheres (continuous hazard). The T6 temperature class (maximum surface temperature ≤85°C) ensures safety even in high-ambient-temperature environments.
- CSA for North American Hazardous Locations:Certified Class I, Division 1, Groups A, B, C, D T6; Class II, Division 1, Groups E, F, G; and Class III. Also approved for Class I, Zone 0, AEx ia IIC T6 Ga. This single sensor can be used across multiple plant areas with different hazardous area classification schemes.
- Limited-Energy Power Requirement:To maintain intrinsic safety certification, the Bently Nevada 74712-06-12-04-CN must be powered by a Class 2 circuit per NEC Article 725.121 or a limited-energy supply per CAN/CSA C22.2 No. 61010-1-12. The maximum allowable parameters are strictly limited to Ui=28V, Ii=16mA, Pi=1.0W for ia installations.
- RoHS and China RoHS Compliance:The sensor meets EU RoHS Directive 2011/65/EU restricting hazardous substances. For China RoHS (SJ/T 11364-2024), associated cables carry an EFUP (Environmentally Friendly Use Period) of 15 years. This compliance simplifies global procurement and importation to regulated markets.
