7 in 1 EC/CF/TDS/PHORP/Humidity Meter WITH RS485 SUPPORT WITH RS485 SUPPORT – TO DOWNLOAD DATAS TO SYSTEM Specifications: PARAMETER RANGE RESOLUTION ACCURACY EC 0.00-20.00 mS/cm 0.01 mS/cm ±2% F.S TDS 0-9999 ppm 1 ppm ±2% F.S pH 0.01-14.00 pH 0.01 pH ±0.05 pH ORP -1200 ~+1200 mV 1 mV ±4% CF 0.1- 199.9 CF 0.1 CF ±2% F.S Temperature 0.1-80 ℃ 0.1℃/0.1℉ ±0.5℃ Humidity 10 %-99% RH 1% ORIGIN : GABY INSTRUMENTS