= pH / mV / ORP / Temperature
= USB connectivity
= GLP/GMP features, self-diagnostics, programmable datalogging interval and storage/recall of up to 999 and data points

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= DO /Barometric Pressure / Temperature
= USB connectivity
= GLP/GMP features, self-diagnostics, programmable datalogging interval and storage/recall of up to 999 and data points
= Automatic or manual temperature compensation, automatic barometric pressure compensation up to five point calibration (mode dependent).

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= Conductivity / Salinity / TDS / Temperature /
= USB connectivity
= GLP/GMP features, self-diagnostics, programmable datalogging interval and storage/recall of up to 999 and data points
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= pH / mV / ISE / ORP / Temperature
= USB and Bluetooth connectivity
= GLP/GMP features, self-diagnostics, programmable datalogging interval and storage/recall of up to 999 and data points
| = pH / mV / Conductivity / Salinity / TDS / ORP / Temperature
= USB and Bluetooth connectivity
= GLP/GMP features, self-diagnostics, programmable datalogging interval and storage/recall of up to 999 and data points

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= pH / mV / ISE / Dissolve Oxygen / Barometric Pressure / Conductivity / Salinity / TDS / ORP / Temperature
= USB and Bluetooth connectivity
= GLP/GMP features, self-diagnostics, programmable datalogging interval and storage/recall of up to 999 and data points
= Automatic or manual temperature compensation, automatic barometric pressure, compensation up to five point calibration.

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