Overview
The Complete Controls 4025-021 is a thermocouple/RTD hybrid sensor probe engineered for reliable industrial temperature monitoring. This used sensor combines the fast response time of thermocouple technology with the long-term repeatability and accuracy of resistance temperature detection (RTD) sensing elements, making it suitable for critical process control applications where both response speed and measurement precision are required.
Key Features
- Hybrid thermocouple-RTD design for combined accuracy and response speed
- Stainless steel construction for corrosion resistance in harsh industrial environments
- Suitable for a wide variety of industrial process applications
- Used condition—fully inspected and functional
- Direct replacement option for compatible temperature measurement systems
Technical Specifications
Due to the age and rarity of this part number, specific manufacturer datasheets are not readily available in current distributor systems. Common specifications for this class of thermocouple-RTD hybrid probes typically include stainless steel sheathing, flexible probe construction, and lead-wire configuration suitable for standard temperature transmitter modules. Refer to the product serial number or internal markings for original calibration and range data. Compatibility with your specific control system should be verified before installation.
Typical Applications
- Industrial furnace and oven temperature monitoring
- HVAC system setpoint control and diagnostics
- Utility boiler and steam system temperature measurement
- Chemical and pharmaceutical process control
- Food processing and storage temperature monitoring
- Replacement probe for legacy temperature measurement systems
Compatibility & Replacements
Compatible With
- Industrial PLC and controller temperature input modules
- Legacy and modern temperature transmitter instruments
- Standard thermowell and probe mounting fittings (NPT and flange styles)
- Systems requiring 4-20 mA or 0-10V signal conversion
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. While this is a used unit from a reputable manufacturer, exact OEM replacement compatibility cannot be guaranteed without additional system documentation. Contact us with your original control system model number for compatibility confirmation.
Works With
- Standard temperature input modules (RTD, thermocouple, or analog inputs)
- Industrial control systems requiring temperature transducer signals
- Transmitter modules supporting Pt100 RTD or Type J/K thermocouple inputs
- SCADA and process automation platforms with temperature monitoring capability





