Thermo Scientific TruFluor DO Single-Use Dissolved Oxygen Sensor
| Brand | Thermo Scientific |
|---|---|
| Origin | USA |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Origin | Imported |
| Model | TruFluor DO Sensor |
| Price Range | USD 7,000 – 14,000 |
Overview
The Thermo Scientific TruFluor DO Single-Use Dissolved Oxygen Sensor is an optical, fluorescence-based analytical device engineered for continuous, real-time monitoring of dissolved oxygen (DO) concentration in bioprocessing and pharmaceutical manufacturing environments. Unlike traditional electrochemical Clark-type sensors—prone to membrane fouling, electrolyte depletion, and calibration drift—the TruFluor DO platform utilizes oxygen-quenched fluorescence technology: a proprietary luminophore embedded in a gas-permeable polymer matrix emits light upon excitation; the presence of molecular oxygen quenches this fluorescence proportionally, enabling highly stable and drift-free measurement without consumable electrolytes or cathodes. Designed explicitly for single-use bioreactors, stirred-tank reactors, and disposable process bags, the sensor integrates seamlessly into closed-system workflows compliant with current Good Manufacturing Practice (cGMP) and Process Analytical Technology (PAT) frameworks.
Key Features
- Optical fluorescence sensing principle eliminates need for electrolyte refills, polarization time, or membrane replacement—reducing operational downtime and maintenance burden.
- Single-use, gamma-sterilizable sensor sleeve ensures batch-to-batch consistency and eliminates cross-contamination risk between runs.
- Patented optical reader design incorporates temperature-compensated photodetection circuitry and low-drift LED excitation source to minimize photobleaching and signal degradation over extended operation.
- Integrated temperature sensor (PT1000) enables automatic thermal compensation across 0–50 °C, supporting accurate DO reporting in dynamic bioreactor conditions.
- IP67-rated optical reader housing with stainless-steel mounting interface ensures compatibility with standard 1/2″ NPT or tri-clamp process connections.
- Plug-and-play digital output via RS-485 Modbus RTU or analog 4–20 mA signal, supporting direct integration into DCS, SCADA, and DeltaV control systems.
Sample Compatibility & Compliance
The TruFluor DO Sensor is validated for use in aqueous cell culture media—including DMEM, RPMI-1640, and chemically defined formulations—as well as buffer solutions and fermentation broths containing proteins, lipids, and shear-sensitive cells. It exhibits no measurable interference from CO₂, pH shifts (pH 5.5–7.5), or common antifoam agents. Regulatory alignment includes compliance with ASTM D888-22 (Standard Test Methods for Dissolved Oxygen in Water), ISO 5814:2012 (Water quality — Determination of dissolved oxygen — Electrochemical probe method), and supports data integrity requirements under FDA 21 CFR Part 11 when paired with Thermo Scientific Orion Star™ Connect software featuring electronic signatures and audit trail functionality.
Software & Data Management
The sensor interfaces natively with Thermo Scientific’s Orion Star™ Connect platform, which provides real-time visualization, configurable alarm thresholds, trend logging at user-defined intervals (1 sec to 60 min), and export-ready CSV/PDF reports. All measurement metadata—including sensor ID, sterilization cycle log, calibration history, and environmental timestamps—is stored with immutable audit trails. The system supports GLP/GMP-compliant electronic record retention, including role-based access control, user authentication, and change history tracking for all configuration parameters. Optional integration with DeltaV Electronic Batch Records (EBR) or Siemens Desigo CC enables automated DO data ingestion into electronic batch records for regulatory submission.
Applications
- Real-time DO monitoring in mammalian, microbial, and stem cell bioreactors (0.5 L to 2000 L scale).
- In-line quality assurance during upstream processing in monoclonal antibody (mAb), viral vector, and vaccine manufacturing.
- Process validation studies requiring high reproducibility across multiple single-use campaigns.
- DO setpoint control loops integrated with sparge gas modulation (air/O₂/N₂) for precise oxygen transfer rate (OTR) management.
- Accelerated process characterization and Design Space definition per ICH Q5 and Q8 guidelines.
FAQ
Is the TruFluor DO Sensor compatible with non-Thermo controllers?
Yes—its RS-485 Modbus RTU interface supports interoperability with third-party PLCs and DCS platforms via standard register mapping documentation provided in the OEM Integration Guide.
What is the recommended calibration frequency?
Factory-calibrated prior to shipment; field verification using air-saturated water (ASW) or zero-oxygen sodium sulfite solution is recommended before first use and after each sterilization cycle.
Can the optical reader be reused across multiple sensor sleeves?
Yes—the reader is designed for permanent installation and repeated use with new sterile sleeves; lifetime rating exceeds 10,000 operating hours under typical bioprocess conditions.
Does the sensor require periodic cleaning or chemical regeneration?
No—optical sensing eliminates electrochemical fouling mechanisms; routine cleaning is limited to external housing wipe-down with 70% isopropanol between batches.
How is traceability maintained across single-use deployments?
Each sensor sleeve carries a unique 2D barcode encoding lot number, expiration date, and calibration certificate ID; scanned automatically by the reader and logged into the connected software with full chain-of-custody metadata.
