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Product Description

The Labmart DO-9100 Dissolved Oxygen Analyzer is a compact, portable instrument for measuring dissolved oxygen and temperature in water. It provides DO readings in mg/L and % saturation, with automatic temperature compensation, LCD display and a polarographic dissolved oxygen electrode. Its lightweight pen-type design makes it suitable for laboratory and on-site water-quality measurements.

Product Overview

The DO-9100 Dissolved Oxygen Analyzer is designed for convenient measurement of dissolved oxygen in aqueous samples. The instrument combines a polarographic dissolved oxygen electrode with an electronic measuring unit and displays dissolved oxygen and temperature on an LCD.

The portable design makes the DO-9100 suitable for routine water-quality testing where measurements may need to be performed directly at the sampling location rather than exclusively at a laboratory bench.

Key Features and Benefits

  • Dissolved Oxygen Measurement: Measures dissolved oxygen from 0.0–40.0 mg/L and 0.0–300.0% saturation.
  • Polarographic DO Electrode: Uses a polarographic-film-covered dissolved oxygen electrode for DO measurement.
  • Automatic Temperature Compensation: Compensates for temperature effects within the specified compensation range.
  • Dual DO Units: Displays dissolved oxygen in both mg/L and %.
  • Temperature Measurement: Simultaneously measures temperature with 0.1°C/°F resolution.
  • Portable Pen-Type Design: Compact construction is convenient for field and on-site testing.
  • Automatic Air Calibration: Supports one-point automatic calibration at 100.0% in air.
  • LCD Display: Provides a clear digital indication of measured values.
  • Quick Response: Response time is specified as up to approximately 45 seconds, with fastest response at around 20°C.
  • Low-Battery Indication: Helps users identify when battery replacement is required.

4. Technical Specifications

Specification Details
Product Type Portable Dissolved Oxygen Analyzer
Model DO-9100
Brand Labmart
Measurement Parameter Dissolved Oxygen & Temperature
DO Measurement Range 0.0–40.0 mg/L
DO Saturation Range 0.0–300.0%
DO Resolution 0.1 mg/L
DO Saturation Resolution 0.10%
DO Accuracy ±1.5% F.S.
Temperature Range 0.0–40°C / 32.0–104.0°F
Temperature Resolution 0.1°C / 0.1°F
Temperature Accuracy ±0.5°C
Electrode Type Polarographic film-covered dissolved oxygen electrode
Calibration One-point automatic calibration
Calibration Reference 100.0% in air
Temperature Compensation Automatic temperature compensation (ATC), 0–50°C
Response Time ≤45 seconds; fastest at approximately 20°C
Display LCD
Backlight Optional
Auto Shut-Off Approximately 15 minutes
Battery 3 × 1.5V LR44
Operating Environment 0–40°C; maximum RH 90%
Dimensions 183 × 37 × 37 mm
Weight Approximately 80 g
Portability Pen-type portable design
DO Electrode Supplied
Certifications / Standards Not specified by the manufacturer

5. Applications

The DO-9100 can be used for:

  • Dissolved oxygen testing in water
  • Laboratory water-quality analysis
  • Environmental water monitoring
  • Aquaculture and fish-farming water assessment
  • Aquarium water testing
  • Wastewater and treated-water checks
  • Surface-water testing
  • Research and educational laboratories
  • Field sampling and on-site water testing
  • General aqueous-sample oxygen monitoring

6. Suitable For

  • Water-quality laboratories
  • Environmental testing laboratories
  • Aquaculture facilities
  • Fisheries and hatcheries
  • Aquarium operators
  • Wastewater-treatment facilities
  • Research institutions
  • Educational laboratories
  • Field-testing teams
  • Quality-control laboratories

7. Product Benefits

  • Portable and lightweight – approximately 80 g for convenient field use.
  • Measures DO in two commonly used formats – mg/L and percentage saturation.
  • Automatic temperature compensation – helps account for temperature influence during measurement.
  • Simple calibration – one-point automatic calibration using air saturation.
  • Compact pen-style construction – practical for routine sampling and on-site measurements.
  • Simultaneous temperature measurement – provides useful temperature information alongside DO.
  • Low-battery indication – helps prevent unexpected interruption during testing.

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