The HM Digital FM-2 filter monitor and volumizer is a nifty tool for keeping track of when to change out your reverse osmosis and de-ionization unit’s filters. The simple digital display can track up to five stages by both time and volume of water going through your RO or RO/DI unit and alert you when to change out that specific stage. No more guessing on how many gallons have traveled through your unit, you’ll be able to set the monitor to keep tabs on the volume rate and know when to change your filters. This will be quite handy to set out a filter-changing cycle where you may want to do more frequent changes to the sediment or pre-filters that are less expensive as well as taking the brunt of the filtration. An LED faucet indicator disc will illuminate a green, yellow or red light when the water is turned on indicating the percentage of elapsed time. Attaching the volumizer is via ¼” quick disconnect connections and will let you chose water volume in either gallons or liters. These units are priced just under $50 USD and is currently on sale for $38.99 over at Bulk Reef Supply.

• A five-stage filter monitor with five independent timers and a tri-color LED faucet indicator disc.
• The volumizer counts up in gallons or liters (settings can be modified).
• Works on time (and volume for the FM-2) for up to five stages (can be less).
• The LED indicator disc will illuminate a green, yellow or red light when the water is turned on.  The color indicates the percentage of elapsed time.
• Auto-Off function conserves battery power. The unit shuts off automatically after 5 minutes of non-use.
• The timer counts down in months or days (settings can be modified).
• Includes an audible alarm (beep).