For full functionality of store.clarksonlab.com it is necessary to enable JavaScript. Here are the instructions how to enable JavaScript in your web browser.
Browse by Manufacturer
Browse Categories
Search
Search our store

Solution Graphics
 

BOD System Oxi700 with 12 sensor heads 115V/230V

<< Previous in Discontinued items Next in Discontinued items >>
Clarkson Price: This item has been replaced by 2444465
Clarkson Catalog Number: L2444410
Manufacturer: Orbeco
Supplier Catalog Number: L2444410
 BOD System Oxi700 with 6 sensor heads 115V/230V Orbeco L2444406
 BOD System Oxi700 with 6 sensor heads 115V/230V Orbeco L2444406BOD System Oxi700 Orbeco L2444406 Accessories
Clarkson L2444410
BOD System Oxi700 with 12 sensor heads 115V/230V  
Orbeco L2444410
 
Orbeco BOD System Oxi700
Highlights
  • Direct Sample Selection
  • Automatic Storage of all values
  • Easy to use
  • Accurate and direct display of
    BOD values in mg/L
  • Automatic start after temperature equalization
  • Mercury-free
  • Inductive stirring system with automatic
    re-centering of stirring rods
Biochemical Oxygen Demand (BOD) is an expression for the quantity of oxygen required for biological degradation of organic matter in a waste water sample. BOD measurement is used as a basis for the detection of biologically degradable organic matter in water.The difference between BOD and chemical oxygen demand (COD) is that COD additionally registers biologically non-degradable organic matter.

BOD measurement is therefore an important measurement of the effects of domestic and industrial waste water on sewage plants and outflow points. Manometric, respirometric BOD measurement using the Oxi700 The Orbeco-Hellige sensor system is a 6 sample system that allows precise measurements of BOD based on the manometric principle.

Manometric respirometers relate oxygen uptake to the change in pressure caused by oxygen consumption while maintaining a constant volume. The integral pressure sensors, make it unnecessary to use mercury for pressure measurements.

bsb-bottle

How it Works

Respirometric methods provide direct measurements of the oxygen consumed by microorganisms from an air or oxygen-enriched environment in a closed vessel under conditions of constant temperature and agitation.Carbon dioxide produced metabolically by the bacteria is chemically bound by the potassium hydroxide solution contained in the seal cup in the bottle. The result is a pressure drop in the system, which is directly proportional to the BOD value and is measured by the Orbeco-Hellige BOD sensor. The BOD level is then displayed directly in mg/l.

The BOD values are stored in the sensor memory and can be viewed on the large-format display at any time without the need for time-consuming conversion using factors. This means that test series that end on a Sunday can be evaluated during the following week without any problem. The measurement period is userselectable between 1 and 28 days to suit the application.While short measurement periods are useful for scientific applications, standard BOD measurements typically extend over a period of 5 days – and manometric determination of OECD, for example, generally takes place over a period of 28 days.

Measuring ranges and sample volumes

The BOD level of a sample depends on the quantity of organic matter present, which can vary considerably. The Orbeco- Hellige Oxi700 is calibrated for the various sample volumes and the corresponding measuring ranges listed in the table below. The overall measuring range of the system is 0 – 4000 mg/l. For all measuring ranges, BOD is shown directly in mg/l.

Range mg/l BOD Sample Volume ml
0 – 40 428
0 – 80 360
0 – 200 244
0 – 400 157
0 – 800 94
0 – 2000 56
0 – 4000 21.7

Temperature equalization

Temperature equalization is essential prior to biological testing, as temperature has a major effect on biological activity. BOD measurements, for example, are always performed in a thermostatically controlled cabinet at a temperature of 20°C.

Day Display/Sensor  
1. Day 150 mg/L  
2. Day 220 mg/L  
3. Day 240 mg/L  
4. Day 250 mg/L  
5. Day 260 mg/L  

Evaluation of measurements

If the measuring period is set at 24 hours, the Orbeco-Hellige Oxi700 BOD measuring system records a measurement once every hour. With a measuring period of 48 hours, the unit measures and stores a BOD value once every 2 hours. If the measuring period is between 3 and 28 days, one value is measured and stored each day.

Current values and stored values may be called up at any time. The table/graph below illustrates an example of BOD5 evaluation. The development of BOD over a period of 5 days is easily seen.

zub_ox

Automatic start function

Variations in sample temperature prior to testing result in pressure variations within the measuring system during the temperature equalisation period in the thermostatically controlled cabinet (if BOD measurement is to take place at 20°C, for example). Such variations would normally cause errors during manometric measurement.

In order to prevent such errors, the Orbeco-Hellige Oxi700 BOD meter is equipped with an automatic start feature: measurement does not commence until the temperature in the samples is the same as that in the thermostatically controlled cabinet. This rules out the possibility of temperature (and hence pressure) fluctuations that are not related to the manometric measurement.

The complete OxiDirect measuring system

In addition to the BOD unit for measurement and storage of BOD levels, the Orbeco-Hellige Oxi700 BOD measuring system includes sample bottles, measuring sensors, non-wearing inductive stirring system, overflow measuring flasks for monitoring of sample volumes, nitrification inhibitor and potassium hydroxide as an absorbent.

Measuring principle: Manometric; mercury-free; electronic pressure sensor
Ranges [mg/l O2]: 0 – 40, 0 – 80, 0 – 200, 0 – 400, 0 – 800, 0 – 2000, 0 – 4000 mg/L
Accuracy* 0.5 % full scale at 20°C
Applications: BOD5, BOD7, OECD 301 F …
Result display: BOD [mg/L]; 4 – digits; 7 – segment LED
Measurement parameter display: BOD, volume, duration, time of measuring
Measurement period: User-selectable, between 1 and 28 days
Auto result storage: Up to 28 results, depending on measurement period
Storage interval: – hourly (1 day);
– every 2 hours (2 days);
– daily (3-28 days)
Automatic start function: – After temperature equalisation of samples;

 

– Can be switched off

Power supply: 3 alkaline-manganese batteries (”Baby”/ cells/size “C”)
Battery life: 1 year (normal use as BOD5 meter (max. one reading a day); early warning before battery fails
Interface RS232 for printer or PC connection
Clock: Real-time clock
Protection class (sensor head): IP 54 (sensor head)
Dimensions:

 

 

 (LxWxH)

375 x 195 x 230 mm including stirring unit
Housing: ABS
Approval certificate: CE

*No standard is available to check the accuracy of respirometric oxygen uptake measurement. Tests with a glucose-glutamic acid solution having a known theoretical BOD have shown that the variation is approximately 5% in the range of 50…100 mg/l BOD, and 3% for higher range. Minimum Response or sensitivity of respirometric systems is about 0.05 … 1 mg/l.

stirringThe Orbeco-Hellige microprocessorcontrolled inductive stirring system is non-wearing and maintenance-free. At regular intervals, the magnetic stirring rods are accelerated and slowed down again, taking them up to maximum speed and back down again. This ensures the centralization of the stirring rods. Stirring rods that move away from the centr of the bottle are re-centered quickly and reliably. The inductive actuation system guarantees maintenance-free operation.

Part number
Description
Oxi700 BOD System (115 V / 230V, 50-60 Hz)
Includes complete unit with 6 sensor heads and control unit with batteries; Inductive stirring unit with power supply; 6 sample bottles; 6 rubber gaskets; 6 magnetic stirring rods, 1 overflow flask (157 mL); 1 overflow flask (428 mL); 1 bottle of potassium hydroxide solution (50 mL); 1 bottle nitrification inhibitor solution (50mL) and instructions
L2444410   *
As above, with 12 sensor heads
L194150
Set of Turbidity Standards : <0.1, 20, 200, 800 NTU
L194141
Formazin Stock Solution (4000 NTU) 100 mL
L2418634
Potassium Hydroxide Solution, 45%, 50mL
L2418642
Nitrification inhibitor (N-ATH), 50 mL
L2444411
ET607 Inductive Stirring System, 230 V
L2444415
ET607 Inductive Stirring System, 115 V
L2444430
Oxi 700 Sensor Head
L2444440
Oxi700 Cable for data transfer
L418328
Test set for Oxi700
L418636
Gasket
L418637
Magnetic Stirring Rod
L418644
BOD Sample Flask, Brown Glass, 500mL
L418645
BOD Sample Flask, Brown Glass, 500mL, Set of 6
L418654
Complete Set of Overflow Flasks
L418655
Overflow Flask, 56 mL
L418656
Overflow Flask, 94mL
L418657
Overflow Flask, 157 mL
L418658
Overflow Flask, 224 mL
L418659
Overflow Flask, 360 mL
L418660
Overflow Flask, 428 mL
L418664
Overflow Flask, 21.7 mL
L444413
Oxi700, Stirring Controller, 230 V
L444414
Oxi700, Stirring Controller, 115 V
 

Product Reviews

(0 Ratings, 0 Reviews)