Neptune Systems AquaController Apex Jr Temperature Probe
Replace the temperature probe, add one for another tank, or put one on your Neptune Systems PM2/PM3 module for temperature compensated readings. Designed for use with the APEX, AquaController Jr., or ACIII. Features include temperature precision up to .1 degree Fahrenheit and an easy 2.5mm connector. 6' cable makes it easy to place the probe exactly where you want to monitor.