WTW TS 608/2-i Biochemical BOD Incubator

Overview

The WTW TS 608/2-i is a precision-engineered biochemical incubator designed specifically for standardized biochemical oxygen demand (BOD) analysis in accordance with ISO 5815-1:2019, ISO 5815-2:2019, ASTM D5210, and EPA Method 405.1. It operates on a forced-air convection principle with microprocessor-controlled Peltier-based cooling and resistive heating, ensuring uniform thermal distribution and minimal temperature fluctuation across the entire chamber volume. Unlike general-purpose incubators, the TS 608/2-i integrates dual internal 230 V AC power outlets—engineered to supply continuous, stable power to WTW OxiTop® IS or OxiTop® CT BOD measurement systems, eliminating external cable routing and reducing contamination risk during extended 5-day incubations. Its double-glazed transparent door enables real-time visual monitoring without thermal disruption, while maintaining consistent chamber integrity and minimizing energy loss.

Key Features

• Stable temperature control within ±1 °C across the full operating range (10–40 °C), with 1 °C programmable resolution and automatic self-calibration of sensor drift
• Dual independent 230 V AC / 50 Hz internal power outlets—designed to directly power up to two complete OxiTop® BOD analyzers (e.g., six- or twelve-bottle configurations) without external adapters or extension cords
• Energy-efficient R-600a refrigerant system combined with low-power Peltier cooling and optimized insulation, achieving 160 W nominal consumption at 20 °C setpoint
• Double-glazed, low-emissivity transparent door with anti-fog coating—enabling non-intrusive observation and remote operation via compatible OxiTop® controllers or PC-based software
• Robust stainless steel interior chamber (470 × 440 × 1452 mm) with rounded corners and seamless welds for easy cleaning and compliance with GLP laboratory hygiene standards
• Integrated ambient condition monitoring: operational range 10–32 °C; storage range −10 to +50 °C; full EMC and safety certification per EN 61010-1 and EN 61326-1

Sample Compatibility & Compliance

The TS 608/2-i accommodates standard BOD sample configurations including 6- and 12-bottle OxiTop® IS/CT systems, as well as custom racks for 300 mL or 600 mL BOD bottles. Its 360 L internal volume supports simultaneous incubation of two independent BOD test series under identical thermal conditions—critical for method validation, duplicate analysis, or parallel wastewater vs. reference sample testing. The unit meets essential regulatory requirements for environmental testing laboratories: it supports audit-ready documentation workflows when paired with WTW LabX® software, complies with FDA 21 CFR Part 11 data integrity principles (via optional electronic signature modules), and maintains traceability per ISO/IEC 17025:2017 clause 7.7 on equipment verification. All thermal performance validations are conducted per ISO 15270:2021 Annex A (incubator qualification protocol).

Software & Data Management

While the TS 608/2-i operates autonomously via its front-panel controller, it is fully interoperable with WTW’s LabX® Light and LabX® Full software suites for centralized instrument management. LabX® enables automated logging of temperature profiles, power outlet status, door-open events, and alarm history—exportable in CSV or PDF formats compliant with GLP/GMP reporting standards. When integrated with OxiTop® CT systems, LabX® synchronizes incubation timestamps with dissolved oxygen measurement cycles, generating time-stamped, tamper-evident BOD calculation reports that include uncertainty estimation per GUM (JCGM 100:2008). Optional Ethernet or RS232 connectivity supports integration into LIMS environments and enterprise-level calibration management systems.

Applications

• Standard 5-day BOD₅ determination in municipal and industrial wastewater treatment plants
• Seeded BOD testing for low-BOD effluents and surface water quality assessment (ISO 5815-2)
• Method comparison studies between BOD, COD, and TOC parameters under controlled thermal conditions
• Validation of alternative biodegradability assays (e.g., OECD 301 series) requiring precise 20 °C incubation
• Long-term stability testing of microbial consortia used in bioreactor inoculation protocols
• Academic research in environmental microbiology where reproducible aerobic incubation conditions are mandatory

FAQ

What is the maximum number of BOD bottles the TS 608/2-i can hold simultaneously?

It supports two full OxiTop® CT-12 systems (24 bottles total) or four OxiTop® IS-6 systems (24 bottles), depending on rack configuration and bottle size.
Does the incubator support temperature ramping or programmable profiles?

No—the TS 608/2-i is optimized for static, long-duration incubation at fixed setpoints; it does not offer multi-step temperature programming.
Is calibration certificate included with delivery?

A factory-issued temperature uniformity and accuracy verification report (traceable to DKD/DAkkS-accredited standards) is provided; on-site IQ/OQ qualification kits are available separately.
Can the internal power outlets be used for non-WTW devices?

Yes—they deliver standard 230 V AC, 50 Hz output; however, WTW does not guarantee electromagnetic compatibility or thermal load stability when powering third-party equipment.
How is door-opening impact on temperature stability mitigated?

The double-glazed door reduces heat transfer by >40% versus single-pane designs; the control algorithm activates predictive pre-cooling/heating 30 seconds after door closure to restore setpoint within ≤8 minutes (tested per ISO 15270).