Microprocessor-Based pH Meters
Models 66,67 & 69 (TV-remote-sized) pH meters have automatic performance; improved software; and expanded pH, millivolt, temperature, and ion-measurement ranges compared with earlier company models. They also claim automatic buffer recognition, automatic temperature control for buffers and samples, an accuracy of ±0.5 °C, a resolution of 0.10 °C, an operating temperature range of -20° to 85 °C, and automatic end-point sensing. Other features include data-acquisition, computer-interface, and printing capabilities; and a Power Mate(tm) carrying case that incorporates recharging facilities. The carrying case's live hinge allows lid removal for easy access and use as a tray. Each meter is powered by four 1.2-V NiCd batteries and comes with a pH electrode; temperature sensor; buffer solutions of pH 4, 7, 10; cables for the RS232; and an instruction manual.
Engineered Systems & Designs, Inc., 119A Sandy Drive, Newark, DE. 19713-1148. Tel: (800) 328-4616 (U.S. and Canada), (302) 456-0446; Fax: (302) 456-0441.