Biochemical Oxygen Demand (BOD, Biochemical Oxygen Consumption)
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An important indicator that indirectly represents the degree of organic pollution in water bodies by the amount of dissolved oxygen consumed through microbial metabolism. It is defined as: under aerobic conditions, the amount of free oxygen consumed by aerobic microorganisms during the oxidative decomposition of organic matter per unit volume of water, expressed in ppm (mg/L). The higher the value, the more organic pollutants in the water, and the more severe the pollution.
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The international standard is to perform a 5-day incubation in an incubator set at 20°C as the standard for determining biochemical oxygen demand, i.e., five-day biochemical oxygen demand (BOD5).
Oxygen Uptake Rate (OUR, Oxygen Uptake Rate)
The oxygen uptake rate measures the oxygen consumption rate of activated sludge, which can be used to analyze whether toxic substances are present, loading conditions, and sludge discharge balance, so as to better set up and control the wastewater treatment process.
Specific Oxygen Uptake Rate (SOUR)
It is a quantitative indicator for evaluating the stability of activated sludge in wastewater treatment, referring to the oxygen consumption per unit mass of activated sludge per unit time; SOUR is an important biochemical indicator in experimental studies such as microbial culture. The SOUR (respiration intensity) of microbial cells refers to the amount of oxygen consumed per unit weight of cells per unit time.
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Wide range, dissolved oxygen 50.00 mg/L (ppm), saturated dissolved oxygen 600.0%
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Measures dissolved oxygen, saturated dissolved oxygen, atmospheric pressure, temperature and multiple important water indicators
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Dissolved oxygen measurement can be directly converted to BOD, OUR, SOUR measurement results
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BOD-Biochemical Oxygen Demand, OUR-Oxygen Uptake Rate or Oxygen Consumption Rate,
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SOUR-Specific Oxygen Uptake Rate or Specific Oxygen Consumption Rate, project measurement, built-in calculation formulas for convenient measurement
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GLP management functions, temperature compensation, automatic atmospheric pressure compensation, salinity compensation
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400 sets of data storage, USB data interface, auto power-off mode
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Excellent waterproof performance, compliant with IP67 standard, suitable for laboratory and field measurements
| DO (Dissolved Oxygen) | Measuring range | 0.00 to 50.00mg/L(ppm); 0.0 to 600.0% saturated dissolved oxygen |
| Resolution | 0.01mg/L (ppm); 0.1% saturated dissolved oxygen | |
| Accuracy (@25℃/77℉) | ±1.5% of reading ±1 digit | |
| Calibration mode | Automatic one-point or two-point calibration at 100% (8.26mg/L) and 0% (0mg/L); Manual one-point calibration using user-entered % saturated dissolved oxygen or mg/L value |
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| Atmospheric pressure | Measuring range | 450 to 850 mmHg |
| Resolution | 1mm Hg | |
| Accuracy (@25℃/77℉) | ±15% of calibration point value ±3mmHg | |
| Calibration mode | One-point calibration at any value within the pressure range | |
| Temperature | Measuring range | -20.0 to 120.0℃; -4.0 to 248.0℉ |
| Resolution | 0.1℃; 0.1℉ | |
| Accuracy (@25℃/77℉) | ±0.2℃, ±0.4℉) (excluding probe error) | |
| Calibration mode | One-point or two-point calibration at any temperature value within the temperature range | |
| Other parameters | Measurement mode | Direct DO, BOD, OUR, SOUR measurement |
| Pressure compensation | Automatic atmospheric pressure compensation within 450-850mmHg range | |
| Salinity compensation | Automatic salinity compensation within 0-70g/L range | |
| Temperature compensation | Automatic temperature compensation within 0.0-50.0℃ (32.0-122.0℉) range | |
| Electrode | HI764073 built-in electrode protective tube and temperature sensor polarographic dissolved oxygen electrode, cable length: 4 m, 10 m | |
| Data storage | Up to 400 sets of on-demand recorded data | |
| Data interface | USB data interface (HI92000-15 data management software package recommended) | |
| Battery type/life | 4*1.5V AA batteries | |
| Auto power-off | 5, 10, 30, 60min, or off | |
| Operating environment | 0-50℃ (32-122℉), RH 100% IP67 | |
| Dimensions | 185x93x35.2mm (7.3x3.6x1.4") | |
| Weight | 400g (14.2oz.) |
Case Studies
Municipal Wastewater Treatment · Hanna — Stock Configuration Case
Project Overview
The site is the inlet, biological and outlet stages of a municipal plant. The customer wanted Hanna properly configured on the existing plant, with the aim of covering portable and laboratory water testing with Hanna instruments.
Technical Challenges
What actually causes trouble is high solids and corrosive fractions, with large diurnal flow swings, and effluent parameters drift and probes foul with sludge and biofilm. All of this means the Hanna configuration has to involve selected by parameter set, accuracy and field portability.
Configuration
Supply and installation were organised through the stock channel: configuring from stock and delivered quickly. On site this meant selected by parameter set, accuracy and field portability, checked line by line against: stable compliance with Grade 1A discharge limits and online data reporting.
Performance
After commissioning the outcome is results available on site, reducing lab re-checks, and the readings are now used for process tuning.
Food & Beverage · Hanna — Stock Configuration Case
Site Conditions
This is a Food & Beverage customer whose plant is at dosing, pasteurising, filling and CIP stages. The main task was covering portable and laboratory water testing with Hanna instruments.
The Problem
The difficulty lies in syrups, dairy and beverages that scale easily, under strict hygienic requirements; at the same time frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. Specification therefore means selected by parameter set, accuracy and field portability.
What We Did
We took a stock channel approach — configuring from stock and delivered quickly. Delivery was built around selected by parameter set, accuracy and field portability, with point-by-point checks on: food-safety and hygienic design per 3-A / EHEDG.
Operating Outcome
In service the system performs as intended — results available on site, reducing lab re-checks, with routine maintenance falling noticeably.
Chemical & Pharmaceutical · Hanna — Stock Configuration Case
Application Context
reactors, metering vessels and finished-product tanks is a typical Chemical & Pharmaceutical duty. The project started from Hanna, focusing on covering portable and laboratory water testing with Hanna instruments.
Process Constraints
corrosion plus Ex protection shortens instrument life and makes downtime costly, and highly corrosive media with solvents and crystallisation, partly in explosive atmospheres only amplify it. The Hanna specification must therefore cover selected by parameter set, accuracy and field portability.
Delivery Approach
Delivery was handled as the stock channel — configuring from stock and delivered quickly. Execution centred on selected by parameter set, accuracy and field portability, together with Ex certification and GMP traceability of records.
Field Results
Operation shows the benefit clearly — results available on site, reducing lab re-checks, with confidence in this measuring point improving markedly.
Power & Energy · Hanna — Stock Configuration Case
Customer Profile
The typical setting in Power & Energy is boiler feedwater, turbine condensate and FGD/DeNOx systems. The measuring point is Hanna; the focus is covering portable and laboratory water testing with Hanna instruments.
Key Difficulties
Conditions are high temperature and pressure with both steam and saline water and, on top of that, drift under high temperature and pressure, with very costly unplanned outages, which a standard configuration cannot handle for long. The design therefore starts with selected by parameter set, accuracy and field portability.
Implementation
The scope ran through the stock channel: configuring from stock and delivered quickly. Technically it hinges on selected by parameter set, accuracy and field portability, and on these requirements: compliance with power-industry codes and unit availability targets.
Customer Benefit
In practice this means results available on site, reducing lab re-checks, which cut the workload on the site maintenance team.
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