KL-200 Digital ORP Controller Technical Specification: Model KL-200 Measuring range 0~¡À1999mV Accuracy ¡À0.1¨G+2 digits Resolution 1mV Output current -500~500mV Relay contact AC220V/5A Environment Temperature:0~50¡æ Humidity<95¨G Display 4-digital LED Input Impedance 1012¦¸ Power Supply 110Vor220V¡À10¨G50/60Hz¡À2¨G Dimensions 108¡Á210¡Á48(mm3) Weight 550g