Ohaus Starter Series pH Electrodes The Ohaus Starter series pH electrodes provide comprehensive pH measurement solutions for diverse laboratory and field applications, featuring 17 specialized electrode variants designed to address virtually any sample type or testing environment. All electrodes are constructed with sturdy and durable glass or plastic shafts built to withstand daily use in demanding conditions, from general purpose laboratory work to harsh industrial environments. The range includes refillable and non-refillable options with various junction types including ceramic, annular ceramic, open junction, and ground glass configurations to prevent clogging in challenging samples. Many models feature integrated 3-in-1 design with built-in temperature sensors that power automatic temperature compensation (ATC), ensuring accurate pH measurements without requiring external temperature probes. From economy models like the ST210 and ST230 for routine applications to advanced double junction electrodes like the ST260, ST410, and ST420 for TRIS buffers and low ionic strength solutions, the Starter Series delivers precision measurement capabilities across pH ranges from 0 to 14 and temperatures from 0°C to 100°C depending on the model. Specialized electrode designs address unique measurement challenges across multiple industries. The STMICRO5 and STMICRO8 micro electrodes feature semi-micro tips capable of measuring samples as small as 0.2 mL in 96-well plates and narrow containers, ideal for research applications with limited sample volumes. The STSURF flat surface electrode with ground glass junction enables direct measurement on moist surfaces such as agar gel plates, meat, cheese, and paper without sample disruption. Spear tip electrodes ST270 and ST272 pierce solid and semi-solid samples including fruits, cheese, and meat for quality control in food production. Field-ready models ST310, ST320, ST320 IP67, and ST322 feature rugged plastic or epoxy bodies with gel-filled references requiring minimal maintenance, while the IP67-rated variant offers waterproof protection with a 3-meter cable for demanding outdoor applications. All Starter Series pH electrodes utilize Ag/AgCl reference systems with various electrolyte configurations and feature BNC or combination BNC/Cinch connectors for seamless compatibility with Starter bench meters (ST5000, AB41PH, AB33PH, AB23PH, ST2200, ST300) and portable meters (ST400M, ST400, ST400D), fitting perfectly in electrode holders and clips. Features of Ohaus Starter Series pH Electrodes: 1 Year Warranty on all accessories: Genuine Ohaus electrodes backed by manufacturer warranty ensuring quality construction and reliable performance for laboratory and field pH measurement applications. Comprehensive Electrode Range: 17 specialized pH electrode variants covering general purpose, micro sample, flat surface, spear tip, double junction, and field-rugged applications from 0-14 pH range. Dual Construction Options: Choice of chemical-resistant glass shafts for laboratory precision or durable plastic/epoxy bodies for rugged field use and harsh environments up to 100°C. Integrated Temperature Compensation: Multiple 3-in-1 models (ST310, ST320, ST322, ST350, ST410, ST420) include built-in ATC sensors eliminating need for separate temperature probes. Advanced Junction Technology: Multiple junction types including ceramic, annular ceramic (long-lasting, clog-resistant), open junction (dirty samples), and ground glass (low ionic strength) configurations. Refillable and Non-Refillable Options: Refillable electrodes allow electrolyte replenishment for extended life, while gel-filled non-refillable models provide maintenance-free operation for field work. Double Junction Protection: Models ST260, ST410, and ST420 feature Ag/AgCl double junction reference systems preventing sample contamination in TRIS buffers, proteins, sulphides, and low ionic strength solutions. Micro Sample Capability: STMICRO5 (5mm diameter, 0.2mL minimum) and STMICRO8 (8mm diameter, 0.5mL minimum) measure in microtiter plates, test tubes, and narrow containers. Specialized Application Designs: STSURF flat surface electrode for agar/meat/cheese, ST270/ST272 spear tips for piercing samples, STPURE for ultra-pure water, ST230/ST280 open junction for slurries. Universal Meter Compatibility: All electrodes feature BNC or BNC/Cinch connectors and 1-meter cables (3m for IP67 model) fitting all Starter Series bench and portable meters with electrode holders and clips. Applications for Ohaus Starter Series pH Electrodes: General Laboratory pH Testing: Using ST310, ST350, or ST230 electrodes for routine pH measurements in aqueous solutions, buffers, and standard laboratory samples across research and quality control. Biochemical and Pharmaceutical Research: Measuring pH in TRIS buffers, protein solutions, and enzyme preparations with double junction electrodes (ST260, ST410, or ST420) to prevent silver ion contamination and ensure sample integrity. Food Quality Control: Measuring pH directly in meat, cheese, fruits, and dairy products with specialized spear-tip electrodes (ST270/ST272) for production monitoring and food safety compliance. Wastewater and Environmental Monitoring: Analysing pH in wastewater, seawater, and contaminated samples with open junction (ST230) or rugged (ST272/ST322) electrodes that prevent clogging from suspended solids. Ultra-Pure Water Analysis: Monitoring pH in deionized water, distilled water, and low ionic strength solutions with refillable STPURE or ST420 electrodes, ensuring stable and accurate measurements in challenging samples. Field and Industrial Applications: Conducting on-site pH testing with field-ready ST310 or waterproof ST320 IP67 electrodes, featuring rugged plastic/epoxy construction and gel electrolytes for durability in demanding environments. Need Help? Call 1300 812 450 Downloads Ohaus Starter Series pH Electrodes - Manual Product Brochure & Owner's Manual PDFs Ohaus Water Analysis and Electrodes - Brochure PDF Ohaus Starter ST310, ST210, ST320, ST230 & STPURE pH Electrode - Manual PDF Ohaus Starter ST350 pH Electrode - Manual PDF Ohaus Starter ST270 Spearhead pH Electrode - Manual PDF Ohaus Starter ST260 pH Electrode - Manual PDF Ohaus Starter STSURF pH Electrode - Manual PDF
