Humatic - Model HCE -500 -EC Controller – Hydroponics Nutrient Doser.

Nutrient measurement unit: EC/TDS scale 0 to 5000 ppm; 2 Peristaltic pump: 300ml/min/pump; Nutrient resolution: 01mS/cm, 1PPM; Nutrient measurement accuracy: +/- 2%; Degree Accurate temperature measurement: +/- 1°C; Temperature measuring range: 0 – 50°C; Nutritional pump with flow rate: 300ml/min/pump and 500ml/min/pump; Voltage DC 12V – 2A,  1 Head Out Next: AC 220V – 3A