... quality,waterproof, low noise etc. Detailed Product Description B603B series intelligent constant pressure water supply controller is suitable ... 20mA, 0~5VDC and 0~10 VDC Standard signal.B603B Intelligent Constant Pressure Water Supply Controller :Power Range: ... -Voltage, Low-Voltage, Phase-Failure, Over-Load etc. B603B series200120022003400140024003Voltage1φ200V-240V3φ380V-440VCapacity(KW)0.751.52.20 ...