Pore Size: The pore size of RO membranes is typically around 0.0001 microns, effectively removing bacteria, viruses, heavy metals, and other contaminants from water.

Removal Rate: Check the membrane's removal rates for different pollutants, especially heavy metals and organics.

Water Flow Rate: The flux (flow rate) of the membrane directly affects its efficiency. A good RO membrane should provide high water output at reasonable pressure.

Water Utilization Rate: Evaluate the wastewater ratio during water treatment; an excellent RO membrane can minimize wastewater production.

Pollution Resistance: The membrane's ability to resist contamination impacts its lifespan and maintenance frequency. Good RO membranes typically have strong self-cleaning properties.

Expected Lifespan: Understand the membrane's expected lifespan and its actual performance under normal usage conditions.

Measured in GPD (gallons per day), GPM (gallons per minute), LPM (liters per minute), GFD (gallons per square inch per day). The home market typically standardizes at 50 GPD, 75 GPD, 100 GPD, 200 GPD, 300 GPD, and 400 GPD.

Calculated by the ratio of the electrical conductivity of the raw water to that of the produced water at 25°C, expressed in percentage. Common keywords include minimum salt rejection rate and stable salt rejection rate (production process control).

The ratio of water production to total feed water, expressed in percentage. Common keywords include single membrane element with a 15% recovery rate.