The HydraClam(R) Water Quality Monitor was designed for the online monitoring of water quality in the distribution system. It measures four key water quality parameters: turbidity (from 0.1 to 10 NTU), pressure (0 to 145 PSI), conductivity (0 to 2500 microSiemens) and temperature (32 to 86 deg. F). The unit is used for targeted water monitoring within identified problem areas or as a fixed-place monitor. Made of lightweight corrosion-resistant aluminum, the purpose-built HydraClam device is easy to install. The unit can be fitted underground to certain European hydrants. Alternatively, a mounting adapter can be used to truncate the main for hydrants in other countries. This low profile installation is less susceptible to tampering and provides increased security. For additional water supply safeguards, an internal non-return valve allows water to only flow out of the unit and not in. The fire department can easily remove and replace the device from fitted hydrants.