WQM-100 Water Quality Monitor

The Hydro Instruments WQM-100 multi-parameter water quality monitor includes one temperature thermistor and can also utilize up to four electrodes in any combination to measure and monitor pH, ORP and conductivity. Each aspect of the sample water is measured using an independent electrode, installed into its own sample cell for simplicity and cost savings.

The controller’s color screen is able to display the live readings with large easy to read fonts. Live charting provides a quick view of water quality trending over a user adjustable period of time for all parameters being monitored. The controller has independently adjustable alarm settings and relays for alarm indication for each parameter being measured as well as an independent 4-20mA output to remotely monitor readings in real-time. Additionally, alarm conditions and live readings can be monitored and settings changed remotely using Modbus; a feature included standard in the WQM-100.

Calibration of the controller has been designed with ease of use in mind and can be performed in the field. pH calibration can be carried out using a single or two-point calibration with buffers. ORP and conductivity calibrations can be performed using known standards.

PID control is included standard to perform either set point or compound loop control and provides a 4-20mA output that can be used to control chemical feed. Compound loop is facilitated by a 4-20mA input from a water flow meter. Set point control can be based on pH, ORP or Conductivity.