Sms510 ORP CONTROLLER, RANGE: ± 1000 mV, WITH ±5 mV ACCURACY. SET POINT RANGE 0 TO 600 mV, AND LED VISUAL ALARM ACTIVE WHEN READING IS LOWER THAN SET POINT. POWER PLUG SOCKET FOR OZONE DOSING. SUPPLIED WITH 12 V DC POWER ADAPTER, MA921B/2 DOUBLE JUNCTION ORP ELECTRODE. NEW CONDITIONING SOLUTION AVAILABLE FOR ORP PROBE SEE MA9025 FOR DETAILS
The Sms 510 is just what you need for controlling the orp in your aquarium.