Pinpoint pH Monitor by American Marine. **** PRODUCT MANUAL **** 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. * Powered by a standard 9-volt battery (not included).