This product is no longer available. Some accessories, replacement parts, or services may still be available.
PH220 pH Probe Amplifier


Although the PH220 pH Probe Amplifier has been retired, some replacement parts remain available (see Ordering Info). The PH220 was a high-impedance differential amplifier used with pH and other ion-specific electrodes (e.g., NH4, CO2, NO3, K, Cl, Ca, SO4, and Na). It typically was used in laboratory settings where inexpensive, unamplified ion-specific probes could be connected in succession.




PH220 Compatibility Information

Connected sensors are measured by the VoltDiff Instruction when using CRBasic or by Instruction 2 (Differential Volts) when using Edlog.

A differential analog input, 12 Vdc, and GND connections are required.

PH220 Compatibility by Datalogger

CR200 Series CR800/CR850 CR1000 CR3000 CR5000 CR7X CR9000X

PH220 Compatibility by Retired Datalogger

CR500 CR510 CR10 CR10X 21X CR23X CR9000