Profile: EDT Direct Ion Ltd. supplies pH testing products like pH meters, pH probes, Isfet meters, Isfet probes, dissolved oxygen meters, and ion selective equipment. We offer a wide range of pH meters like FE253 pH meter, FE257 pH meter and BA350 pH meter. The FE253 pH meter is a general purpose portable pH/mV/ temperature meter. The The FE253 can be used with any of the impressive range of combination or half-cell pH electrodes from EDT direct ION, thus ensuring accurate pH measurement regardless of sample matrix. Our other product, the RE347TX is an advanced, automatic meter, designed for use in the laboratory. The RE347TX has four measurement modes, % saturation, temperature, and the uncalibrated raw signal in pA. The instrument may be calibrated in water or air, and may be connected to computers or printers through the bi-directional RS232 interface.