Test Equipment

The testo 6651 rises to special challenges. Paired with the testo 660x probe series, it becomes the top choice for demanding air conditioning technology and a wide range of other applications.

Designed for building air conditioning applications, this humidity and temperature transmitter is available in wall or duct versions with a long-term stable humidity sensor. Additionally, two analog outputs cover temperature and humidity, and P2A software supports parameterization, adjustment, and analysis. It suits both room and duct installations, with an optional 2-line LCD display.

Designed for greenhouses and laboratories, this humidity and temperature transmitter monitors critical climates for biological research with a long-term stable humidity sensor rated at ±2.5% RH. Additionally, an integrated ventilator directs airflow onto the sensor for an averaged climate reading. Its housing integrates the probe to protect electronics from moisture.