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YSI

YSI, a brand with origins dating back to 1948 and headquartered in Yellow Springs, Ohio, is a manufacturer of water quality monitoring and sampling instruments. The product line encompasses a range of field and laboratory equipment for measuring parameters such as dissolved oxygen, pH, conductivity, turbidity, and ammonium. YSI’s portfolio includes probes, sensors, meters, electrodes, calibration solutions, and accessories like carrying cases, data hubs, and replacement parts. The brand is known for its optical dissolved oxygen (ODO) technology, which uses luminescent-based sensors to reduce maintenance and drift compared to traditional membrane-based probes. YSI instruments are designed for use in environmental monitoring, industrial process control, aquaculture, and municipal water treatment applications. Products are built to withstand field conditions, with many probes featuring IP67-rated connectors and ruggedized cables. The ODO-4 probe, for example, uses a flat tip and Mil-Spec connection for compatibility with the 5500D, ProDSS, ProODO, and ProSolo handheld instruments. YSI also provides lab-grade calibration standards, such as the ammonium standard (100 mg/L, 500 mL), to ensure measurement accuracy. Accessories like the LS FLEX/430 colorimeter lab dock and the DATA HUB data hub support data logging and instrument docking. Replacement parts, including cap membrane kits (model 5913) and light shields (REP3-900001015), are available to extend the service life of sensors. 3G Electric supplies YSI products globally, offering a selection of probes, electrodes, calibration solutions, and accessories for plant engineers, maintenance managers, and procurement specialists who require reliable water quality measurement tools. The catalog includes items like the pH laboratory electrode (model 1203) with a 1-meter cable and BNC connection, and soft-sided carrying cases (model 3075) for field transport. YSI’s focus on optical sensing and modular instrument platforms allows users to configure systems for specific monitoring needs, from spot sampling to continuous deployment. The brand’s technical documentation provides detailed specifications on measurement ranges, accuracy, and environmental ratings, enabling buyers to select appropriate equipment for their applications.

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About YSI

YSI, a brand with origins dating back to 1948 and headquartered in Yellow Springs, Ohio, is a manufacturer of water quality monitoring and sampling instruments. The product line encompasses a range of field and laboratory equipment for measuring parameters such as dissolved oxygen, pH, conductivity, turbidity, and ammonium. YSI’s portfolio includes probes, sensors, meters, electrodes, calibration solutions, and accessories like carrying cases, data hubs, and replacement parts. The brand is known for its optical dissolved oxygen (ODO) technology, which uses luminescent-based sensors to reduce maintenance and drift compared to traditional membrane-based probes. YSI instruments are designed for use in environmental monitoring, industrial process control, aquaculture, and municipal water treatment applications. Products are built to withstand field conditions, with many probes featuring IP67-rated connectors and ruggedized cables. The ODO-4 probe, for example, uses a flat tip and Mil-Spec connection for compatibility with the 5500D, ProDSS, ProODO, and ProSolo handheld instruments. YSI also provides lab-grade calibration standards, such as the ammonium standard (100 mg/L, 500 mL), to ensure measurement accuracy. Accessories like the LS FLEX/430 colorimeter lab dock and the DATA HUB data hub support data logging and instrument docking. Replacement parts, including cap membrane kits (model 5913) and light shields (REP3-900001015), are available to extend the service life of sensors. 3G Electric supplies YSI products globally, offering a selection of probes, electrodes, calibration solutions, and accessories for plant engineers, maintenance managers, and procurement specialists who require reliable water quality measurement tools. The catalog includes items like the pH laboratory electrode (model 1203) with a 1-meter cable and BNC connection, and soft-sided carrying cases (model 3075) for field transport. YSI’s focus on optical sensing and modular instrument platforms allows users to configure systems for specific monitoring needs, from spot sampling to continuous deployment. The brand’s technical documentation provides detailed specifications on measurement ranges, accuracy, and environmental ratings, enabling buyers to select appropriate equipment for their applications.

Common Applications

  • Environmental monitoring — YSI ODO-4 dissolved oxygen probe for stream and lake water quality assessment
  • Wastewater treatment — YSI pH electrode model 1203 for influent and effluent pH measurement
  • Aquaculture — YSI ProDSS handheld with ODO-4 for real-time oxygen levels in fish tanks
  • Industrial process control — YSI ammonium standard 3843 for calibrating nutrient analyzers in water treatment
  • Field sampling — YSI soft-sided carrying case 3075 for transporting ProDSS and accessories
  • Laboratory analysis — YSI colorimeter lab dock LS FLEX/430 for benchtop colorimetric testing

Frequently asked questions

Common questions about YSI from 3G Electric.

What is the difference between YSI's optical dissolved oxygen (ODO) probes and traditional membrane-based probes?

YSI's ODO probes use luminescent optical technology that measures dissolved oxygen via a sensor coated with a fluorescent material. This method does not require a membrane, electrolyte solution, or stirring, reducing maintenance and calibration frequency. Traditional membrane-based probes rely on a Clark-type electrochemical cell with a permeable membrane and require regular membrane replacement and electrolyte refilling. ODO probes, such as the ODO-4, are less prone to drift and are suitable for low-oxygen environments. They are compatible with YSI instruments like the ProDSS and ProODO.

Which YSI pH electrodes are available through 3G Electric, and what connection types do they use?

3G Electric supplies YSI pH laboratory electrodes, such as model 1203, which features a BNC connection and a 1-meter cable. These electrodes are designed for use with compatible YSI meters and are suitable for general-purpose pH measurement in lab or field settings. The BNC connector is a standard interface for many pH meters, allowing easy interchangeability. Other YSI pH probes may use different connection types, so verify compatibility with your instrument before ordering.

What calibration solutions does YSI offer for ammonium measurement, and what are their specifications?

YSI provides calibration solutions for ammonium measurement, such as the ammonium standard (model 3843). This lab-grade solution has a concentration of 100 mg/L and is supplied in a 500 mL volume. It is used to calibrate YSI instruments that measure ammonium, ensuring accurate readings. The solution is typically used in environmental monitoring and wastewater treatment applications. Always follow the manufacturer's calibration procedure and use fresh standards for best results.

How do I replace the cap membrane on a YSI dissolved oxygen sensor?

YSI offers cap membrane kits, such as model 5913, for replacing the membrane on compatible dissolved oxygen sensors. The kit includes a pre-assembled cap with a membrane and O-ring. To replace, remove the old cap, rinse the sensor body with clean water, and screw on the new cap. Ensure the O-ring is seated properly to prevent leaks. After replacement, recalibrate the sensor according to the instrument manual. The kit dimensions are 2 inches in height, 4 inches in width, and 4 inches in depth.

What is the YSI DATA HUB used for, and which instruments is it compatible with?

The YSI DATA HUB (model DATA HUB) is a data logging accessory that allows users to connect multiple YSI sensors or instruments for centralized data collection. It can interface with YSI sondes and handheld meters, enabling real-time monitoring and data storage. The hub is typically used in continuous monitoring setups for water quality parameters like dissolved oxygen, pH, and conductivity. It supports data export for analysis. Compatibility depends on the specific instrument model; refer to the product manual for supported devices.

Does 3G Electric supply YSI products?

Yes — 3G Electric (S) Pte. Ltd. supplies YSI products. We stock the YSI catalog and supply genuine factory-original products with full manufacturer warranty and technical support.