MPR Magnetic Probe Rack

Neptune Systems Magnetic Probe Rack (MPR) keeps your Apex system's probes organised and stable. This acrylic-mounted solution securely holds up to four probes—temperature, pH, ORP, and salinity—using powerful neodymium magnets that prevent floating and measurement drift. The oversized slot accommodates Neptune's larger temperature probe, while the compact design (10.1 cm × 6.35 cm) fits safely on glass or acrylic tanks up to 12 mm thick. Built from durable acrylic, the MPR eliminates probe placement guesswork and helps maintain reliable water parameter readings for your reef or planted setup.