HVAC & Temperature Control
Intelligent control for heating, cooling, and climate systems.
KELD develops electronic controllers for temperature regulation, defrost management, and climate system coordination in commercial, industrial, and vehicle applications. Our controllers are designed to fit the specific architecture and operational logic of your equipment — not the other way around.
TYPICAL APPLICATIONS
- Commercial refrigeration: display cases, cold rooms, bottle coolers.
- HVAC systems: rooftop units, fan coils, heat pumps.
- Vehicle air conditioning and climate control
- Agricultural and livestock ventilation and climate management.
- Industrial heating and process temperature control.
WHAT MAKES OUR CONTROLLERS DIFFERENT
Custom user interfaces: display type, button configuration, and menu logic tailored to your product and your end users.
Sensor integration: NTC, PTC, 4–20 mA, digital sensors — configured to your measurement requirements.
Multi-relay and multi-output architectures for complex control sequences (compressor staging, valve control, fan speed modulation).
Communication protocols: Modbus, BACnet, proprietary — matched to your system architecture.
Full regulatory compliance support: CE, UL, RoHS, and application-specific standards.
PRODUCT FAMILIES
Choose a family to see its models, datasheets and documents.
KTS Series
The new generation of KELD temperature controllers: IP66 front and programming by NFC and app. Configured with your team, ready for series production.
Temperature controllers
Digital controllers for heating, cooling and refrigeration, from one relay to five, with keys or capacitive touch keys. For the new generation with NFC and app programming, see the KTS Series.
Humidity controllers
Digital controllers for humidity, and for temperature and humidity together.
Temperature indicators
Panel-mounted temperature indicators with high-brightness digits. Red, green or blue display, depending on model.
Special-purpose controllers
Solar thermal systems, milk tanks, timers and high temperature: dedicated controllers with a 3-digit display.
Accessories
Programming key and probes for KELD controllers.