YSI 600XL Multiparameter Water Quality Sonde Water Level Indicators The 1640 comprises a conductivity

The 1640 comprises a conductivity probe that mounts above the stream

lockable weatherproof enclosure

and advanced logging modes

Constructed from durable

and general area surveys

YSI 600XL Multiparameter Water Quality Sonde Water Level Indicators The 1640 comprises a conductivityBoth the YSI 600XL (sampling) and the YSI 600 XLM (logging) are economical solutions in small packages for surface water and groundwater applications. Both easily fit into 2 inch wells and measure a range of fundamental parameters, including oxygen with the YSI Rapid Pulse stirring independent dissolved oxygen sensor and level, using a highly accurate vented sensor.