American Marine Electronic Pinpoint Monitors
Using the most current technology and design, American Marine electronic Pinpoint monitors have become the most respected line of digital instruments in the aquarium and aquaculture business. American Marine electronic Pinpoint monitors have a 2-Year manufacturer's warranty. Monitors are available for pH testing, salinity and ORP (important if you use an ozonizer).
Most probes will last 12-18 months (continuous duty). They should be replaced once they cannot be calibrated. Check calibration monthly to verify your readings and refer to your owners manual for directions and specification on each monitor.