Replacement sensor for LAQUAtwin Conductivity Meter EC11, EC22, EC33 and older model B-771. Replace the sensor when calibration can no longer be performed. When the sensor is new, use the HORIBA conditioning solution which is supplied with the meter to condition the conductivity sensor. Alternatively wash the sensor in a dilute solution of detergent and lukewarm water.
The new sensor simply snaps into position on the meter.