3 Channel Peristaltic Dosing Pump System and similar items

Smart Nutrient dozer/monitor Arduino based. Includes Both pH and EC sensors, peristaltic pumps For Nutrients A,B and pH down. These units were used on College projects. Pumps, sensors, everything is new, just been tested in the lab. Set points and all parameters are software controlled. You may change all parameters ,timing or load your own Arduino Uno sketch. Includes new pH sensor, EC sensor, USB stick with programs loaded in it, instructions. Needs12vdc power adapter. This is for Quantity 2 Units with probes. default program set as follows upon power up. 1. Starts feeding nutrient A with 5 small bursts. Monitors EC (you can change timing.) 2. Starts mixing procedure 1minute. (Unit provides 12v output for mixer) optional. 3 Starts feeding nutrient B with 5 small bursts. Monitors EC (you can change timing.) 4 Starts pH dosing if needed. 5 Mixing 1 minute for pH 6. If all parameter such as (EC=1.8,pH =6.5 ) are ok, just keeps monitoring. IF not. goes to lockout mode to prevent over feeding. Has a reset button for lockout.