Dissolved oxygen tester

Introduction

A dissolved oxygen tester is an instrument used to measure the dissolved oxygen concentration in the water and the aqueous solutions, and it is used in the environmental monitoring, the aquaculture, the water treatment, and the many other applications. The dissolved oxygen tester measures the dissolved oxygen by the electrochemical method, with the polarographic or the optical sensor, and it provides the concentration, expressed in the milligrams per liter or in the percent saturation, with the temperature and the salinity compensation; the dissolved oxygen tester consists of a meter with the display, a dissolved oxygen sensor or the probe, and the controls, and it provides features such as the calibration and the automatic compensation; the dissolved oxygen tester is used for the measurement of the dissolved oxygen in the rivers, the lakes, the ponds, the wastewater, and the aquaculture water, for the monitoring, for the quality control, for the assessment of the water quality, for the fish farming, and for many other applications, and it is available as the portable, the handheld, and the benchtop models; the dissolved oxygen tester is an essential instrument for the dissolved oxygen measurement. Dissolved oxygen testers are used in the environmental monitoring, in the aquaculture, in the water treatment, in the laboratories, and for many other applications. With their dissolved oxygen measurement, dissolved oxygen testers are essential for the water quality assessment.

Portable Dissolved Oxygen Tester LPDO-T2010

Portable Dissolved Oxygen Tester supports up to 12 parameters: pH, EC, , DO, Temperature, mV, , pX, Resistivity, , Salinity, and DO Saturation. It is equipped with advanced a 4.3-inch hi...

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Pocket Dissolved Oxygen Tester LPKDO-T2010

Pocket Dissolved oxygen tester is equipped with advanced polarographic sensor to measure dissolved oxygen content. The system menu of dissolved oxygen meter can set 6 parameters which in...

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Standards

JJF 2294-2025-Calibration specification for on-line low-level dissolved oxygen meters

IEC 60746-4:2018-Expression of performance of electrochemical analyzers-Part 4: Dissolved oxygen in water

Complies with the above standards, but is not limited to them.

Features

1. Dissolved oxygen tester for laboratory or field DO measurement.

2. Electrochemical or optical sensor for accurate dissolved oxygen determination.

3. Suitable for environmental, aquaculture, water treatment, food and research.

4. Includes tester, DO probe, calibration supplies and operation manual.

5. Supports dissolved oxygen measurement for water quality and process monitoring.

FAQ

Q1: What testing scenarios is this tester mainly applied to?

A: The dissolved oxygen tester is used in environmental monitoring, aquaculture, water treatment, food and beverage, research and industrial processing to measure dissolved oxygen (DO) concentration and saturation in water for water quality assessment, environmental monitoring and process control. It supports environmental water quality monitoring (rivers, lakes, oceans), aquaculture DO management, wastewater treatment process control (aeration basins), drinking water quality assessment, food and beverage process monitoring, biological research, and industrial water treatment. The accurate DO measurement enables proper aeration control, environmental assessment and process optimization.

Q2: What standards does the tester comply with?

A: The dissolved oxygen tester follows relevant ISO, ASTM and GB/T standards for dissolved oxygen measurement, including ISO 5814, ASTM D888, and GB/T standards. The hardware complies with IEC 61010 safety standards. Calibration should use certified methods (air saturation, Winkler titration reference). Water quality standards follow applicable regulations.

Q3: What is the warranty period for the whole machine and key components?

A: The whole dissolved oxygen tester is covered by a 12-month warranty. The probe, electronics and display are covered, while membranes, electrolyte, batteries and fuses are consumables. Damage from improper use, probe damage or unauthorized repair is excluded.

Q4: Is this device difficult to operate? Is professional training required?

A: Operation requires basic training in DO measurement, probe maintenance and calibration. We provide operation manuals, training and application support. Proper probe calibration, maintenance, polarization (for electrochemical probes) and measurement technique are important for accurate results.

Q5: What is the typical lead-time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Is regular calibration required? What is the recommended calibration cycle?

A: Calibration (air saturation or zero oxygen) recommended before each use session for critical monitoring. Probe membrane and electrolyte replacement per usage (electrochemical probes). Optical probes require less maintenance. Full tester calibration annually. Battery replacement when needed.

Q7: Are supporting consumables universal?

A: Probe membranes, electrolyte, batteries and calibration supplies are available from water testing suppliers, though probe compatibility should be verified. Long-term consumable cost depends on probe type.

Q8: Can I customize parameters or supporting accessories?

A: Customization includes sensor type (electrochemical, optical), measurement range, temperature compensation, salinity compensation, data logging and accessories. Additional probes and accessories can be ordered separately. Custom orders extend delivery lead-time.

Q9: Does the purchase include on-site installation and commissioning service?

A: No installation is required for portable testers. The package includes the tester, probe, calibration supplies and instruction manual. On-site training is available at additional cost.

Q10: What types of water are compatible with this equipment?

A: The dissolved oxygen tester measures DO in freshwater, saltwater, wastewater, drinking water and other aqueous solutions within the DO range, temperature and salinity specification. Electrochemical probes require proper membrane and electrolyte maintenance; optical probes are less maintenance-intensive. Users should calibrate properly before use, ensure proper probe polarization, allow sufficient stabilization time, account for temperature and salinity, report results as mg/L or percent saturation with temperature specified, and follow proper probe storage. The probe should be cleaned regularly to prevent fouling. For wastewater, the probe may require more frequent cleaning. The tester should be stored with the probe properly stored (wet cap for electrochemical probes). For field measurements, samples should be measured on-site if possible, as DO changes during transport. The probe should not be exposed to direct sunlight for extended periods (optical probes). For high-accuracy work, the Winkler titration method can be used as a reference calibration.