Profile: Carel USA is engaged in the production of humidifiers and microprocessor controllers for HVAC/R applications. We offer controllers for air-conditioning & refrigeration, humidification systems and monitoring & remote management systems. Our pCO2 programmable controllers are designed to satisfy a wide range of applications in the air-conditioning and refrigeration fields. Our pCO2 controllers are available in three different sizes, according to the I/O and power requirements. We are accredited with ISO 9001 certification.