Bench-top pHmeter-Conductivity meter-Thermometer measures pH, mV, ORP values by pH, redox or separated reference electrodes, conductivity, liquids resistivity, total dissolved solids (TDS) and salinity by combined conductivity and temperature probes by Pt100 or Pt1000 probes. Datalogger which stores maximum, minimum, average value. RS232 C serial output or USB 2.0 for data download to a PC or printer from memory or in real time. Functions: REL, HOLD, auto power off which can be disabled, protection degree IP 66. Battery power supply or mains power supply by SWD10 (optional).