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| OXITOP RESPIROMETER
SYSTEMS |
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Pressure sensors for BOD testing and measurements.
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FEATURES:
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Simple operation
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Non-Toxic
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Stores 100 user-defined routine measurements
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User-friendly on screen guidance for easy operation
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Respirometer Systems Product Description
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OxiTop IS 6, IS 12
Measurement using OxiTop® Biological Oxygen Demand (BOD) Respirometer
Systems is based on a pressure measurement in a closed system: microorganisms
in the sample consume the oxygen and form CO2. This is
absorbed by NaOH, creating a vacuum which can be read directly as a measured
value in mg/l BOD.
The sample volume being tested regulates the amount of oxygen available for a
complete the respirometer system's BOD measurement. BOD measurement
ranges of up to 4,000 mg/l can be measured with the respirometer system using
different sample volumes.
The OxiTop® BOD respirometer system's heads (green and yellow for
differentiation of inflow/outflow) have an AutoTemp function: if the sample
temperature is too cold, the start of BOD measurement is automatically delayed
(by at least 1 hour) until a constant temperature has been reached.
Apart from the automatic storage of 5 measured values (1 value per day) by the
respirometer systems, further measured BOD values can be read at all times
during or after the period of 5 days, which permits the tracking of check
values or measurements over longer periods. The OxiTop BOD respirometer
system instrumentation measurement system also offers simple operation,
improved controllability, and non-toxicity.
OxiTop Control 6, Control 12
The OxiTop® Control Biological Oxygen Demand (BOD) respirometer system is
an advanced version of the successful OxiTop® BOD respirometer system that
uses software-controled functions and an infrared interface to communicate with
a handy controller, the OC 100. These respirometer systems enable the
simultaneous and grouped start, management, storage and tracking of 100 BOD
measuring heads via the controller and allows them to be tracked on a large
display with graphic evaluation. BOD measurement data from the
respirometer systems can be transferred to the PC for evaluation and
documentation via the AK-540/B cable (order no. 902842) and the communication
program Achat OC (order no. 208990).
The respirometer system's biological oxygen demand (BOD) data can be called up
at any time, even during sampling, thus enabling checking of the samples for
errors. The respirometer system's display of the progress curve allows
immediate detection of irregularities and interferences, such as having the BOD
value set too high for the volume used or undesired nitrification. BOD
measurement corrections to the respirometer systems can thus be made at an
early stage. The OxiTop® Control BOD respirometer systems offer you
simple operation, improved controllability, non-toxicity, and measuring ranges
of up to 4,000 mg/l BOD.
Biological Oxygen Demand Measurements according to EN 1899-1 and EN 1899-2 and
for self-checks
Biological oxygen demand (BOD) determination is still one of the most important
parameters in water resource management. BOD measurements can be used to
evaluate the impact of biodegradable substances in waters and wastewater by
measureing the quality of water and treatment results in wastewater. In
addition, BOD instrumentation measurments are used in the planning and design
of wastewater treatment facilities. The OxiTop® BOD respirometer
systems offer a unique, modular and mercury-free way to make BOD
measurements. The respirometer systems are not only suitable for BOD
determination, but also for measuring biodegradability and depletion.
In routine use, BOD determination is used to check the wastewater in the inflow
and discharge of wastewater treatment plants. Depending on the
measurement site and type of wastewater the BOD value can lie between a few
mg/l and several thousand mg/l. Several BOD testing methods are available
for carrying out the measurement.
Various systems for BOD determination methods
In "dilution BOD" the oxygen content of a sample is measured with an oxygen
sensor before and after an incubation period of 5 days. The difference
between the measurements is the BOD5 value; this is the official EPA BOD
measurement method. The Oxi 1970i
Portable Dissolved Oxygen Meters can be used for dilution BOD
measurments.
In "BOD self-checks" with the respirometer system the reduction in oxygen
causes a definite pressure difference which can be measured by a pressure
sensor. This BOD measurement method is very easy and practical to carry
out.
Although both methods are very different, the respirometer system BOD
measurements correlate for discharge analysis in municipal wastewater treatment
facilities. Both BOD measurement methods require that the samples to be
kept at 68 °F (20 °C) for 5 days. WTW offers a temperature
controlled box for use with Oxitop® BOD respirometer systems.
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Respirometer Systems Specifications
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OxiTop IS Respirometer Systems
Measuring principle: Respirometric (manometric)
Display: 2-digit 7-segment LED, 10 mm
Measured parameter: Digits
Measuring range: 0 to 40 digits (+10 digits for overranging)
Accuracy: + 0.03 psi (+ 2 hPa) or + 1 digit
Admissible measuring temperature: 68°F ± 1.8°F (20°C
± 1°C)
Admissible sample temperature (when being filled): 59-68°F
(15-20°C)
Power supply: Lithium batteries (260 mAh), 2 x type CR 2430 (3V)
Power consumption: Max. 25 mA (during measurement)
Battery run time: ~ 3 years with normal use
Protection class: 3 IEC 1010
Protection system: IP 54 IEC 529
EMC
Emissions: EN 50081-1, FCC Class A
Immunity: EN 50082-2, NAMUR recommendation
Climate class: 2, VDI/VDE 3540
Ambient temperature:
Storage: -13°F to +149°F
(-25°C to +65°C)
Operation: 68°F ± 1.8 F
(20°C ± 1 C)
Test mark: CE
Dimensions: H: 2.7in, dia. 2.8in (69 mm, dia. 70 mm)
Weight: Approx. 3 oz. (85 g)
OxiTop -C
Measuring principle: Respirometric (manometric)
Measured of: BODn (oxygen drift according to DIN 38409 T 52)
Pressure range: 7.25 to 19.5 psi (500 to 1350 hPa(mbar))
Accuracy: + 1% of measured value, + 7% of measuring range
Resolution: 0.015 psi (1 hPa)
Display: LED pilot lamps
Power supply: Lithium batteries (260 mAh), 2 x type CR 2430 (3V)
Battery run time: ~ 2 years with normal use
Protection class: 3 IEC 1010, EN61010 part 1
Protection type: IP 54 DIN 40050
Admissible measuring temperature: 68°F ± 1.8 F (20°C
± 1 C)
Admissible sample temperature (when being filled): 59-68°F
(15-20°C)
EMC
Emissions: EN 50081-1, FCC Class A
Immunity: EN 50082-2
Climate class: 2, VDI/VDE 3540
Ambient temperature:
Storage: -13°F to +149°F
(-25°C to +65°C)
Operation: 41°F to 122°F (5°C
to +50°C)
Test mark: CE, UL, CUL(UL/CSA)
Dimensions: H: 2.8in, dia. 2.8in (70 mm, dia. 70 mm)
Weight: Approx. 3.4 oz. (95 g)
OC 100 BOD Respirometer Systems Controller
Data sets per measurement: 180 to 360 (depending on duration)
Measurement period: 0.5 hr to 99 days
Power supply: 3 AA batteries; alkaline 1.5V
Interface: IR (infrared); RS 232 for communications with PC
Ambient temperature:
Storage: -13°F to +149°F
(-25°C to +65°C)
Operation: 41°F to 104°F (5°C
to +40°C)
Dimensions (HxWxD): 1.7x3.9x7.9 in (45x100x200 mm)
Weight: Approx. 13.8 oz. (390 g)
BOD Respirometer Systems Magnetic Stirrer
Power supply:
Input: 230 VAC (+10%/-15%) 50/60 Hz /24 VA
Output: 18 VAC / 1 A
Power consumption: 24 VA max.
Speed of the stirring rods: Program-controlled 180 to 450 min-1
Instrument protection class: 3, IEC 1010, IP30
EMC
Emissions: EN50081-1/FCC class A
Immunity: EN50082-1, EN50082-2, Namur
Climate class: 2, VDI/VDE 3540
Ambient temperature:
Storage: -13°F to +149°F
(-25°C to +65°C)
Operation: 41°F to +104°F
(+5°C to +40°C)
Relative humidity:
Yearly mean: < 75 %
30 days/year: < 95 %
Remaining days: < 85 %
Test mark: CE, UL, CSA
Dimensions (LxWxH):
IS 6: 10.5x7.25x2.75 in (265x181x67 mm)
IS 12: 13.75x10.5x2.75 in (350x266x67 mm)
Weight (inclusive line adaptor):
IS 6: 3.5 lbs (1.6 kg)
IS 12: 7 lbs (3.2 kg)
BOD Respirometer Systems Thermostat Box
Temperature control: 68°F +0.9°F (20°C +0.5°C)
Ambient temperature:
Storage: -13°F to +122°F
(-25°C to +50°C)
Operation: 50°F to 89.6°F
(10°C to 32°C)
Power consumption: 200W
Dimensions (HxWxD): 14.76x16.73x23.62 in (375x425x600 mm)
Weight: Approx. 66.1 lbs. (30 kg)
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Respirometer Systems Options & Prices
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Prices listed are for United States and Canada only. Call or e-mail us
for pricing in other countries.
Terms and Conditions
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OxiTop® IS 6 (PN# 208210)
Respirometer systems for self-check with 6 measuring units, universal power
supply, 50/60 Hz power plug, and accessories.
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OxiTop® IS 12 (PN# 208211)
Respirometer systems for self-check with 12 measuring units, universal power
supply, 50/60 Hz power plug, and accessories.
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Call |
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OxiTop® Control 6 (PN# 208201)
Respirometer systems for self-check, with controller OC100, 6 measuring units
with IR interface, universal power supply, 50/60 Hz, and accessories. For
PC evaluation and documentation interface cable AK 540/B (902842) and the PC
communication program Achat OC (208990) are required.
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OxiTop® Control 12 (PN# 208204)
Respirometer systems for self-check, with controller OC100, 6 measuring units
with IR interface, universal power supply, 50/60 Hz, and accessories. For
PC evaluation and documentation interface cable AK 540/B (902842) and the PC
communication program Achat OC (208990) are required.
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| RESPIROMETER
SYSTEMS ACCESORIES |
Achat OC (PN# 208990)
PC communication program for Controller OxiTop® OC 100 for further data
processing and documentation of measuring data. Required accessories:
Interface cable AK 540/B (902842).
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AK 540/B (PN# 902842)
Interface cable for connection of instrument with 6-pin socket to a PC via RS
232 interface, 9/25 adapter included.
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OxiTop® Thermostat Box (PN# 208433)
OxiTop® BOD Respirometer Systems thermostat box, for up to 12 OxiTop®
units and stirrer base, 115 VAC, 50 Hz
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