Neptune Systems Temperature Probe

The Neptune Systems Temperature Probe is a high-precision submersible sensor engineered to deliver continuous, real-time water-temperature monitoring for both reef and freshwater aquariums. It plugs directly into any compatible Neptune Systems controller (such as Apex, Apex Jr, or modules like PM2/PM3), giving you accurate data for heater/chiller control, automated alerts, and logging. The rugged, salt-water–resistant build ensures long-term reliability, while its compatibility across the Apex lineup makes it a dependable choice when replacing a worn sensor or expanding to a new tank.