BOD – Biochemical Oxygen Demand

LAR BioMonitor from LAR Germany is an online BOD analyzer for the determination of biochemical oxygen demand (BOD), respiration and toxicity in waste water. By using own activated sludge from plant, BioMonitor can accurately performing BOD measurement in short time and thus efficiently control their waste water treatment plant in an optimal way.

It not only measure BOD, but it simultaneously measures Activated Sludge Respiration (ASR) which is an important indication on the condition of plant’s biomass.

The patented measuring method of the LAR BioMonitor works just like a miniature treatment plant !!

LAR Biomonitor


  • Very fast measurement in less than 4 minutes
  • Measure both BOD and sludge activity
  • Use own activated sludge
  • Sample gets degraded without any extra dilution
  • Simultaneous measurement of the Activated Sludge Respiration (ASR)
  • Detect rapid BOD changes
  • Utilize maintenance-free filter-less sample preparation
  • Good Correlation with Laboratory BOD5 Result (APHA 5210B)


  • Environmental Protection
  • BOD Monitoring
  • WWTP Control


Measurement MethodContinuous 2 Stream Respiration Measurement
Bacteria CulturePlant Activated Sludge (Biomass)
Measurement RangeBOD: 1 – 50 mg/L, 1 – 200,000 mg/L
ASR: 0 – 5 mg/L/min
Response TimeMinimum: 3 – 4 Minutes
(Application Dependent)
Power Supply115 or 230 VAC, 50/60 Hz, 100 Watts
Output2 x Dry Contact Relays
2 x 0/4 – 20mA Analogue
HousingIP54 Steel Epoxy Powder Coated Steel
Display10.4″ High Resolution and Backlit TFT Touch Screen
WeightApprox. 90 kg
Dimension600 x 558 x 862 mm (W x D x H)
Standard FeaturesAuto Start Function
Self Explanatory Software and Service Checklist
USB Port
Additional OptionsRemote Access via TCP/IP
AccessoriesLAR Flow Sampler (Maintenance Free Particle Separator)
LAR Sludge Recycling Unit
A I ANALYTICAL PTE LTD | Address 30, Kallang Place, #06-01, Singapore 339159 | Tel: +65 6459 0785 | Email: