Overview
The Rosemount 400-12 Endurance Conductivity Sensor is a contacting conductivity measurement sensor engineered for industrial process control and water chemistry monitoring. Built with factory-measured cell constant, this unit requires no initial calibration and delivers reliable electrolytic conductivity readings in a broad range of applications—from high-purity water systems to clean cooling water loops.
Key Features
- Factory-measured cell constant (0.1/cm) ensures out-of-the-box accuracy with no calibration required
- Pt-1000 temperature compensation for accurate readings across temperature variations
- Direct screw-in installation via 3/4 inch MNPT fitting for standard process piping
- Integral cable connection with 10 ft (3.1 m) standard cable length
- Sidestream installation option using pipe tee or flow cell for flexible deployment
- Corrosion-resistant construction rated for clean, non-corrosive liquids up to 20,000 µS/cm
Technical Specifications
- Cell Constant: 0.1/cm
- Temperature Compensation: Pt-1000 (standard)
- Measurement Range: 0–20,000 µS/cm
- Maximum Temperature: 221°F (150°C)
- Maximum Pressure: 250 psig (1,725 kPa)
- Wetted Materials: Titanium electrodes, 316 stainless steel body, PEEK insulator, EPDM O-rings
- Process Connection: 3/4 inch MNPT
- Cable Length: 10 ft (3.1 m) standard; 50 ft (15.2 m) optional
- Vacuum Rating: <0.005 SCFM @ 1.6 in. Hg
Typical Applications
- Boiler feedwater quality monitoring
- Cooling water conductivity control
- High-purity water system verification
- Wastewater treatment conductivity measurement
- Power plant chemistry management
- Industrial process water monitoring
Compatibility & Replacements
Compatible With
- Rosemount transmitter models 56, 1056, 1057, 1066, 5081
- Legacy transmitter models 1055, 54C, 54eC, 4081C, 6081-C, XMT-C
- Emerson Process Management control and monitoring systems
- Industrial process automation and SCADA platforms supporting analog conductivity input
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Rosemount 400-12 serves as a direct replacement within the Rosemount 400 and 400VP sensor family where configuration and cell constant match your application.
Works With
- Rosemount transmitter families (56, 1050, 1055, 1066, 5081 series)
- Analog data acquisition systems with 4–20 mA input capability
- Emerson DeltaV and other distributed control systems (DCS)
- SCADA software supporting standard analog instrumentation protocols
- Sidestream flow cells (PN 24091-02 and equivalent)
