The PD 450 meter uses optical measurement technology offering fast response times and long-term stability with minimal maintenance for dissolved oxygen measurements. Plus the automatic temperature compensation (ATC), barometric pressure compensation, and salinity correction further ensure DO measurement accuracy. The large, backlit LCD lets you view pH, mV, % saturation, or mg/L (ppm) simultaneously with temperature.

Rugged, IP67-rated waterproof housing makes the meter ideal for plant or field testing. Additional features include ready (stability) indicator, smart averaging, hold function, calibration alarm, and battery-life indicator.

Perform data logging with manual or timed collection of up to 500 data sets with real-time clock time/date stamp. Order optional data cable for USB or RS-232 connectivity to a PC.

What's included: PD 450 meter, pH probe (35641-51), RDO probe (35640-53), sensor cap (35640-51), calibration solutions, two AA batteries, and hard carrying case (35614-51).