Have confidence in your readings !Developed to meet all field and laboratory requierements, the Digital ODEON instruments combine the versatility of an easy-to-use, easy-to-read handheld unit.Rugged, reliable and IP-67 waterproof, the ODEON measures dissolved oxygen with the new OPTOD optical probe, pH,ORP, conductivity, temperature, and turbidity.Thanks to PONSEL plug and play digital probes, autodiagnostic and calibration data inside, you just have a total confidence in your readings. just measure !You need a simple and robust mono-parameter instrument, purchase a ODEON Classic with one ultra low power probe (pH/ORP/T, DO, Conductivity or Turbidity)You need a versatile instrument ? Purchase a ODEON OPEN ONE ! Thanks to the Open Technology, your one channel system will accepte all PONSEL probe.Your application require simultaneously parameters from 2 probes, purchase the ODEON X