OxiTop®-i: Respirometric BOD Measuring system

BOD measurement without dilution – direct and compliant with standards

The OxiTop®-i is a respirometric BOD measurement system from WTW® for in-house monitoring of biochemical oxygen demand (BOD) in the laboratory. The system measures undiluted samples in accordance with DIN EN 1899-2 (H55) – a decisive advantage over the traditional dilution method, as it eliminates the need for complex conversions.

The measurement principle is based on pressure measurement in a closed system: The oxygen consumed by microorganisms during the degradation of organic substances generates a measurable pressure drop. This is continuously recorded by the measuring head and displayed directly as a BOD value on the backlit LCD graphic display—no separate evaluation device is required.

The measurement duration can be freely selected between 1 and 7 days; seven different sample volumes ranging from 22.7 to 432 ml enable measurement ranges up to 4,000 mg/L BOD.

OxiTop®-i G (208270):

• 1 OxiTop®-i measuring head (gray), menu-driven, with backlit LCD graphic display, status LED, three control buttons, for direct display of BOD measurements, volume preselection, selectable measurement duration (1 to 7 days), trend display, real-time value display.

OxiTop®-i B (208272):

• 1 OxiTop®-i measuring head (blue), menu-driven, with backlit LCD graphic display, status LED, three control buttons, for direct display of BOD readings, volume preselection, selectable measurement duration (1 to 7 days), trend display, and real-time value display.

OxiTop®-i 2 (208274):

• 2 OxiTop®-i measuring heads (1 blue, 1 gray), menu-driven, with backlit LCD graphic display, status LED, three control buttons, for direct display of BOD readings, volume preselection, selectable measurement duration (1 to 7 days), trend display, real-time value display.

OxiTop®-i SET 2 (208264):

• Small set for 2 measurement points: 2 OxiTop®-i sensor heads (1 blue, 1 gray), 2 PF 600 sample bottles, 2 GK 600 rubber sleeves, and 2 RST 600 magnetic stir bars.

OxiTop®-i 6 (208276):

• 6 OxiTop®-i measuring heads (3 blue, 3 gray), menu-driven, with backlit LCD graphic display, status LED, three control buttons, for direct display of BOD readings, volume preselection, selectable measurement duration (1 to 7 days), trend display, real-time value display.

OxiTop®-i SET 6 (208266):

• Small set for 6 measurement points: 6 OxiTop®-i sampling heads (3 blue, 3 gray), 6 PF 600 sample bottles, 6 GK 600 rubber sleeves, and 6 RST 600 magnetic stir bars.

OxiTop®-i IS 6 (208260):

• Complete set for 6 measuring points: 6 OxiTop®-i measuring heads (3 blue, 3 gray), 1 IS 6 stirring platform, nitrification inhibitor (25 ml), 2 overflow measuring flasks 164 ml / 432 ml, 6 magnetic stirring rods, 1 stirring rod remover, 6 sample bottles, 6 rubber sleeves, universal AC adapter, 100–240 VAC, 50/60 Hz.
• Please order sodium hydroxide pellets NHP 600 separately.

OxiTop®-i 12 (208278):

• 12 OxiTop®-i sensor heads (6 blue, 6 gray), menu-driven, with backlit LCD graphic display, status LED, three control buttons, for direct display of BOD readings, volume preselection, selectable measurement duration (1 to 7 days), trend display, real-time value display.

OxiTop®-i IS 12 (208262):

• Complete set for 12 measurement points: 12 OxiTop®-i measurement heads (6 blue, 6 gray), 1 IS 12 stirring platform, nitrification inhibitor (25 ml), 2 overflow measuring flasks 164 ml / 432 ml, 12 magnetic stirring rods, 1 stirring rod remover, 12 sample bottles, 12 rubber sleeves, universal AC adapter, 100–240 VAC, 50/60 Hz.
• Please order sodium hydroxide pellets NHP 600 separately.

The OxiTop®-i is designed for wastewater treatment plants, municipal and industrial laboratories, as well as environmental monitoring agencies that are required to perform standard-compliant BOD self-monitoring. The system is suitable for domestic wastewater as well as for industrial wastewater contaminated with organic or inorganic substances.