Technical Specification: Model KL-100 Measuring range 0.00~14.00PH Accuracy ±0.02PH Resolution 0.01PH Set Range 3.50～10.50PH Relay contact 5A/240VAC Environment Temperature:0~50℃ Humidity<95℅ Display 4-digital LED Input Impedance 1012Ω Power Supply 220V±10℅ 50Hz±2℅ Dimensions 108×210×48 (mm3) Weight 550g