Revolutionizing respirometric testing

OxiTop® is a range of laboratory respirometers from WTW that utilize pressure measurement to determine Biochemical Oxygen Demand (BOD). Ideal for wastewater treatment plants, environmental labs, and biodegradability testing, OxiTop systems automatically track oxygen consumption through pressure changes in sealed chambers. This manometric respirometry method provides simple, accurate, real-time BOD results without manual DO measurements and complex BOD calculations - streamlining compliance, reducing errors, and accelerating testing across diverse water quality applications.

Why choose OxiTop?


• Automated Testing for Consistent Results
  Simplifies workflows, ensuring consistent, reproducible results.

• Real-Time Monitoring
  View biodegradation progress live with continuous pressure data and direct graphical display via OxiTop controllers.
• Versatile Across Applications
  Ideal for BOD monitoring, wastewater treatment, biogas research, and soil respiration studies.

• Aerobic & Anaerobic Biodegradation Testing
  Measures microbial activity under both oxygen-rich and oxygen-depleted conditions.

• Influent & Effluent Pollutant Monitoring
  Ensures regulatory compliance and process control for industrial and municipal facilities.

• Advanced Pressure Sensor Technology
  Accurately detects oxygen consumption and gas production.

• Regulatory Compliance
  Meets international standards including OECD 301F, ISO 9408, and DIN EN 1899-2.

OxiTop IDS: Trusted testing meets wireless innovation


OxiTop IDS combines WTW’s trusted respirometric technology with the power of Bluetooth® connectivity for smarter, faster biodegradability and BOD testing. As part of the IDS platform (Intelligent Digital Sensors), each OxiTop IDS head features built-in digital intelligence and wireless communication, enabling seamless pairing with Multi 3620 IDS or Multi 3630 IDS multi-parameter instruments.