This meter is a great value. The ranges work to test water quality in wastewater, surface water, groundwater, or drinking water. LCD shows results in ppm or mg/L with enunciators to aid in use and troubleshooting. Six simple buttons allow for freezing measurements, toggling between display units and temperature results, setup, calibration, and automatic barometric and salinity compensation after manual parameter inputs. Additional benefits of the simple design allow you to view electrode slope, zero offset, and millivolt values for electrode diagnostics.
Purchase zero oxygen solution (00653-00) separately to calibrate meter.