Transmitter for greenhouses and laboratories The testo 6631 transmitter was developed specially for monitoring critical ambient conditions in greenhouses, e.g. for bio research purposes. Precise and reliable humidity measurement is indispensible in these applications, in order to avoid costs caused Process security and system availability, among the most important factors in experimental plants, are supported by a number of properties of the testo Testo humidity sensor guarantees highest long- term stability and accuracy ±2.5 %RH P2A software for parameterization, adjustment and analysis saves time and costs in commissioning Optimum concept for fast adjustment and calibration (1-point, 2-point and analog adjustment) for increasing accuracy and long-term stability Integrated ventilator allows targeted flow impact onto the sensor, enabling the recording of an averaged climate inside the greenhouse cell. Quick and easy ventilator replacement with ventilator drawer assembly and plug-in connection Easy exchange of sensor filter Protection of the electronics and sensor from humidity influences (e. g. sprinkler) Monitoring critical climate bio research, e g. in greenhouses for research purposes: • Research institutes, pharmaceutical and chemical companies for the research and development of insecticides, pesticides and fertilizers.

Transmitter for greenhouses and laboratories Technical data * Measurement uncertainty calculation according to GUM (Guide to the Expression of Uncertainty in Measurement): The following uncertainties are used in the calculation: - Adjustment site/factory calibration ■ Uncertainty contribution of the test site Subject to change without notice.

Transmitter for greenhouses and laboratories Technical drawings Connection plan Plug manufacturer Euchner Cable socket*; Type BS 7K Plug manufacturer Tuchel-Amphenol Cable socket*; Type 01630 D00610010 Pin socket**; Type Eco mate instrument plug * The cable socket is not included in delevery ** Installed In Instrument ex-works Subject to change without notice.

Transmitter for greenhouses and laboratories The following options can be specified for the testo 6631 : Bxx Analog output / supply Cxx Display / menu language BXX Analog output / supply B01 4 to 20 mA (2-wire) with separate ventilator B06 4 to 20 mA (4-wire) with built-in ventilator C01 with display / English M01 Sintered stainless steel filter M03 Sintered PTFE filter Order code for transmitter testo 6631 with - with display - Sintered PTFE filter Subject to change without notice.