BPHT109 pH/ORP transmitter is ideal for monitoring of pH and ORP (mV). Complete electrical isolation between measuring circuit supply and the 4-20mA output is provided. The BPHT109 is compatible with most pH electrodes. The transmitter is housed in a compact DIN case enclosure IP65 suitable for panel and feild mounting. The digital display provides a continuous display of the pH or ORP (mV) level as well as temperature and provides a convenient ’on the spot’ display during calibration and setting up. Easy to follow ’on display’ messages assist the user to set up and calibrate the transmitter. Two point calibration provides a thorough calibration using two accurate buffer solutions.