DC1761 Handheld DO Tester for Field Dissolved Oxygen Monitoring in Water Systems

LaMotte Pocket Tester for Tracing Dissolved Oxygen — Dissolved oxygen checks in water and process samples

This Tester is most useful for aquaculture, environmental, and wastewater teams who need a portable instrument for field or lab verification of oxygen levels for treatment efficiency, aquatic health, or process control.

This advanced water testing meter has been referenced in environmental monitoring studies and aquaculture research as a reliable tool for measuring dissolved oxygen (DO) levels in freshwater and marine environments. Peer-reviewed articles in journals such as the Journal of Environmental Management and Water highlight the importance of accurate DO measurement for ecosystem health and aquaculture productivity.

Industry reviews and customer feedback note its ease of use, fast response, and portability, making it popular among aquarists, pond managers, and environmental scientists. Common applications include monitoring fish tanks, ponds, lakes, and rivers, as well as field research and water quality testing programs, with general feedback emphasizing its reliability, minimal sample requirement, and non-invasive approach.

This meter assesses the dissolved oxygen in a water sample in a highly non-invasive manner, as it simply needs the sensor to be inserted into a sample. This technique needs minimal samples and has nearly no impact on a water system. It is excellent for inspecting fish tanks, ponds, lakes, rivers, and virtually any other water source for its dissolved oxygen levels.

Importance of Dissolved Oxygen

Dissolved oxygen measurements are an excellent indication of health in a water system. The dissolved oxygen in water is essential for plant and animal life in water and can be supplemented by humans through the use of a bubbler or circulating pump.

Risks of Low Dissolved Oxygen

Low dissolved oxygen readings increase the relative population of anaerobic organisms such as plants and some bacteria, which can potentially result in fish kills.

Features

• Oxygen level displayed as % Saturation from 0 to 200.0% or Concentration from 0 to 20.00 ppm (mg/L)
• Adjustable Altitude Compensation (0-20,000 ft in 1,000 ft increments)
• Adjustable Salinity Compensation from 0 to 50 ppt
• Memory stores up to 25 data sets with DO and Temperature reading
• Self-calibration on power up; Data Hold, Auto power off, Low battery indicator
• Optional 3 ft (1m) or 16 ft (5m) extension cable
• Complete with DO electrode, protective sensor cap, spare membrane cap, electrolyte, four 1.5V SR44W batteries, and 48" (1.2m) neckstrap

For comprehensive water quality analysis, the Dissolved Oxygen Tracer Pocket Tester can be complemented with additional instruments that measure other key parameters. For example, the Portable pH/EC/TDS/Temperature Meter with CAL Check™ allows users to monitor pH, conductivity, total dissolved solids, and temperature alongside dissolved oxygen levels, providing a more complete picture of water chemistry in field or laboratory applications. For more advanced monitoring, the Multiparameter Water Quality Meter HI9829 offers the ability to measure several critical water quality indicators—including dissolved oxygen, pH, conductivity, and turbidity—in a single robust instrument designed for environmental testing. Laboratories and specialized applications may also benefit from the BrewLab® Pro Water Analysis Kit, which provides a comprehensive approach to analyzing multiple water parameters and is particularly useful for brewing, research, and quality control environments.

Technical Q&A

What water sources can the PockeTester be used for?

The PockeTester is suitable for fish tanks, ponds, lakes, rivers, and almost any freshwater or marine environment where dissolved oxygen measurement is needed.

How accurate is the dissolved oxygen reading?

The meter provides readings as % Saturation from 0 to 200% or in Concentration from 0 to 20 ppm, and it includes self-calibration to ensure reliable results.

Can this meter store previous measurements?

Yes, it can store up to 25 data sets including both dissolved oxygen and temperature readings, making it easy to track changes over time.

Is the PockeTester easy to use in the field?

Yes, it is highly portable, requires minimal water sample, and has optional extension cables for flexibility in field measurements.

Does it require frequent maintenance?

The meter is low-maintenance, but occasional replacement of the membrane cap and electrolyte is recommended to maintain optimal performance.

What makes this kind of instrument practical for daily use?

Portable operation, straightforward calibration routines, and application-specific sensors or scales help teams get faster and more repeatable results where the work is actually happening.

Who benefits most from this product?

Aquaculture, environmental, and wastewater teams benefit most when they need quick, defensible readings for process adjustments, troubleshooting, or documented quality checks.

Because it combines Adjustable Salinity Compensation from 0 to 50 ppt, Memory stores up to 25 data sets with DO and Temperature reading, Optional 3 ft (1m) or 16 ft (5m) extension cable, this product is a strong fit for dissolved oxygen checks in water and process samples in real operating conditions.