Overview
The Eurotherm 101/003 temperature controller is a single-loop process controller engineered for HVAC and refrigeration applications. Eurotherm has been a trusted supplier of temperature and process control instrumentation for industrial automation for decades. The 101/003 series delivers accurate setpoint control and alarm functionality suitable for manufacturing, processing, and climate control environments where precise temperature management is critical.
Key Features
- Single-loop PID temperature control with precise setpoint regulation
- Thermocouple and RTD input compatibility for diverse sensor types
- Relay output for heating and cooling circuits
- High/low alarm functionality for process monitoring
- Panel-mount design with industrial-grade construction
- Suitable for HVAC, refrigeration, and general process applications
Technical Specifications
| Manufacturer | Eurotherm (Schneider Electric) |
| Model / Part Number | 101/003/03/024/14/21 |
| Series | 101 |
| Controller Type | Single-Loop Temperature Controller |
| Input Type | Thermocouple / RTD (configurable) |
| Output | Relay contacts (heating/cooling) |
| Mounting | Panel-mount (1/16 DIN / 48 × 48 mm) |
| Operating Temperature Range | 0 to 55°C (32 to 131°F) ambient |
| Control Mode | PID with manual/auto selection |
| Alarms | High/Low setpoint alarms |
| Certifications | UL, cUL compliance |
| Application Category | HVAC, Refrigeration, Process Control |
Typical Applications
- HVAC Systems: Maintenance of building temperature setpoints and emergency freeze protection
- Refrigeration Units: Cold storage facility temperature regulation and defrost control
- Industrial Processing: Temperature monitoring in manufacturing and materials handling
- Chiller / Boiler Control: Precision heating and cooling loop management
- Environmental Chambers: Laboratory and test enclosure climate control
Compatibility & Replacements
Compatible With
- Thermocouple and RTD temperature sensors (J, K, T, E, R, S types typical)
- Standard 24 VAC / 110 VAC / 220 VAC control power supplies
- Heating and cooling relay loads (verify amperage rating)
- HVAC building management systems and standalone operation
- Industrial automation platforms requiring simple setpoint control
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Eurotherm 101/003 may replace earlier-generation single-loop controllers in HVAC systems; however, input/output wiring and configuration must be confirmed.
Works With
- Manual configuration via front panel button or optional PC setup tool
- Eurotherm iTools configuration software (where applicable)
- Standard relay wiring to contactor and heating/cooling load circuits
- 4–20 mA transmitter output for integration with master controllers
