Horiba Conductivity Meter Kit (EC210K)
It’s the newest generation of Waterproof handheld meters from Horiba that measure pH / dissolved oxygen / mV (ORP) - with an additional electrode. This comes with:
If are you're looking to measure two parameters simultaneously (Dissolved Oxygen / pH / and ORP if you get an extra electrode) then this is right for you. The meter itself is very durable and the housing is IP67 waterproof, non-slip, shock & scratch resistant.
The memory for the PD210 goes up to 500 datasets but if you are needing larger memory, real-time clock, date/time stamp and also PC connection, then the PD220K would be ideal for you.
If you are looking to measure all 3 parameters simultaneously then I would recommend the WQ-330 with triple channels.
Summary: The PD210 is a double channel multi-parameter suitable for measuring pH, Conductivity, ORP, TDS, Salnity and Resistivity.