BOD Sensor

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Innovative, mercury-free and extremely reliable solution for BOD analysis (Biochemical Oxygen Demand).


Precise Control

  • Measurement on scales of 90, 250, 600 and 999 ppm BOD
  • Higher values can be measured by diluting the sample
  • Models with stirring stations offer VELP stirring quality


Extremely Practical

  • Fits directly on the bottle containing the sample
  • Automatically stores 5 BOD values at 24-hour intervals
  • Enables analysis to continue over the weekend
  • Results directly readable at any time, even after five days
  • Direct readout in mg/l (ppm)
  • Compact stirring stations


Priority to Safety

  • IP 54 protection against particle and liquid ingress
  • Class 3 IEC 1010 conformity


Choice of Models

  • BOD Sensor Set, a ready-to-use solution for individual BOD analysis only
    BOD Sensor, a dark glass bottle, an alkali holder and a stirring bar. BOD Sensor Set is designed for use with the VELP MST stirrer.
  • 6-position stirring station, 6 BOD Sensors, dark glass bottles, alkali holders & stirring bars.
  • BOD Sensor System 10, a complete package for 10 tests
    10-position stirring station, 10 BOD Sensors, dark glass bottles, alkali holders & stirring bars.


Technical Data


Construction Material technopolymer
Power BOD Sensor -
BOD Sensor Set -
BOD Sensor System 6 2 W
BOD Sensor System 10 2 W
Power supply BOD Sensor 2x3V lithium batterie
BOD Sensor Set 2x3V lithium batteries
BOD Sensor System 6 115 V or 230 V / 50-60 Hz
BOD Sensor System 10 115 V or 230 V / 50-60 Hz
Dimension (WxHxD) BOD Sensor 55x71x73 mm (2.1x2.8x2.9 in)
BOD Sensor Set 75x230x75 mm (3.0x9.3x3.0 in)
BOD Sensor System 6 270x300x185 mm (10.6x11.8x7.3 in)
BOD Sensor System 10 432x300x165 mm (17.0x11.8x6.5 in)
Weight BOD Sensor 0,08 kg
BOD Sensor Set 0,4 kg
BOD Sensor System 6 2,3 kg
BOD Sensor System 10 3 kg



Reading value: mg/l (ppm) directly on the display
Measurement by electronic pressure probe
Bottle total capacity 500 ml
Stored data 5 BOD values at 24h intervals
BOD values directly on the display at any time also after the standard 5 days period
BOD last determination possible
Scales 90, 250, 600, 999 ppm BOD. Higher values after dilution
Display digit 3 LED
Safety class 3 IEC 1010
Electronic protection degree CEI EN 60529 IP 54




BOD Analysis has never been so easy!

BOD Sensor is the innovative, mercury-free and extremely reliable solution for BOD analysis. A microprocessor-controlled pressure transducer transfers the Biochemical Oxygen Demand value directly to the display: results are displayed directly in mg/l with no need for further calculation and are stored automatically in the BOD Sensor.


The process is extremely easy, based on just few simple steps:

1. Add a stirring bar, fill the bottle with the sample and insert CO2 trap, filled with reagents
2. Incubate
3. Screw the sensor
4. Monitor the microorganism activity
5. Read the BOD value (ppm or mg/l), based on the pressure change into the bottle because of microorganisms’ activity