American Marine Pinpoint pH Monitor and Probe The PINPOINT pH Monitor™ is in use by thousands of customers worldwide. This affordable unit remains the only full-time pH monitor with .01 resolution. The PINPOINT pH Monitor™ is sold complete with probe and calibration fluids (9 volt battery not included). The electrode is also available separately and fits any meter, monitor or computer controller. Given proper care, the PINPOINT pH Monitor™ should last a lifetime. PINPOINT pH Probe comes with a 10 foot high supression cable and a BNC connector.