Overview
The Rosemount 442 conductivity sensor is designed for reliable measurement of electrolytic conductivity in clean, non-corrosive liquid environments. This analog output sensor integrates with Rosemount transmitters and industrial automation systems for real-time process monitoring. Manufactured by Emerson’s Rosemount division, the 442 offers factory-calibrated accuracy suitable for water treatment, cooling tower monitoring, boiler feed applications, and general-purpose conductivity measurement.
Key Features
- Analog output for seamless integration with industrial control systems and transmitters
- Factory-calibrated cell constant eliminates initial calibration requirements
- Compatible with standard Rosemount transmitter models for plug-and-play deployment
- Designed for clean, non-corrosive liquids and conductivity ranges under 20,000 µS/cm
- Rapid response time to conductivity and temperature changes
Technical Specifications
Specifications for the Rosemount 442 should be verified against manufacturer documentation or your system integrator, as this model may have regional or legacy variants. Typical Rosemount conductivity sensors in this family operate with the following general parameters:
- Output Type: Analog (DC current or voltage)
- Mounting: Through-hole or immersion installation
- Measurement Range: Typically 0–20,000 µS/cm (verify with datasheet)
- Operating Temperature: Consult manufacturer documentation
- Process Connection: Standard threads or compression fittings
- Cable Length: Typically 10 ft (3.1 m) standard; 50 ft (15.2 m) optional
- Manufacturer: Emerson Rosemount
Typical Applications
- Power plant cooling water and boiler feed water monitoring
- Water treatment and demineralization process control
- Pharmaceutical and food-and-beverage cooling systems
- Cooling tower conductivity trending and blowdown control
- Industrial process water purity monitoring
- Laboratory and analytical water quality systems
Compatibility & Replacements
Compatible With
- Rosemount transmitter models 56, 1056, 1057, 1066, and 5081
- Legacy Rosemount transmitter models 1055, 54C, 54eC, 4081C, and 6081-C
- Standard analog 4–20 mA instrumentation loops
- Industrial process control systems with analog input modules
- Data acquisition and SCADA systems accepting analog conductivity signals
Replaces / Drop-In Replacement For
Note: Verify compatibility with your system integrator before ordering. The Rosemount 442 may replace earlier-generation Rosemount conductivity sensors in the same series; however, specific model cross-references require confirmation from Emerson technical documentation or your controls vendor.
Works With
- Rosemount Analytics transmitters and indicators
- Analog input modules (Allen-Bradley, Siemens, Mitsubishi, Omron, Schneider)
- Industrial Ethernet gateways with analog signal conversion
- SCADA and process monitoring software (via analog conditioning)
- Standard 4–20 mA instrumentation networks
