EcoTech High-Throughput Aquatic Organism Respirometry System
| Brand | EcoTech |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | HT-Respiro 24/96/240 Series |
| Pricing | Available Upon Request |
| Oxygen Measurement Range | 0–50% O₂ or 0–22.5 mg/L |
| Detection Limit | 0.15% O₂ (15 ppb DO) |
| Accuracy | ±1% at 20.9% O₂ |
| Resolution | ±0.4% at 20.9% O₂ or ±5 µmol at 283.1 µmol |
| Response Time | <30 s |
| Drift | <1% air saturation per week (10-min sampling interval) |
| Channel Capacity | Up to 240 parallel channels (10 × 24-channel readers) |
| Sensor Technology | Fluorescence-based optical oxygen sensing (REDFLASH for 96-well format) |
| Sample Chamber Material | Borosilicate glass (24-well) or sterile polystyrene (96-well) |
| Chamber Volume | 80–1700 µL (24-well) |
| Dimensions (per 24-channel reader) | 163 × 89 × 22 mm |
| Weight (per reader) | 380 g |
Overview
The EcoTech High-Throughput Aquatic Organism Respirometry System is an engineered platform for real-time, non-invasive measurement of dissolved oxygen consumption and metabolic flux in small aquatic organisms and biological samples. Based on fluorescence quenching principles—specifically phase-modulated optical detection of oxygen-dependent luminescence decay—the system delivers high-fidelity respirometric data without electrode drift, membrane fouling, or electrochemical interference. Unlike Clark-type electrodes, this fiber-optic approach eliminates oxygen consumption by the sensor itself and enables true in situ measurements inside temperature-controlled incubators, orbital shakers, or hypoxic chambers. The system supports both static closed-chamber and intermittent-flow respirometry protocols compliant with ASTM E1527-22 (Standard Guide for Environmental Site Assessments) and ISO 8692:2012 (Freshwater algal growth inhibition test), making it suitable for regulatory-grade ecotoxicology, developmental physiology, and climate stress response studies.
Key Features
- Optical oxygen sensing with sub-30-second response time and <1% long-term drift over one week (10-minute sampling interval)
- Non-invasive, non-destructive measurement—no sample perturbation, no electrode insertion, no stirring artifacts
- Modular architecture: scalable from 24 to 240 parallel channels via daisy-chained readers; each 24-channel unit weighs only 380 g and fits within standard CO₂ incubators or shaking platforms
- Two sensor configurations: borosilicate glass 24-well plates (reusable, ethanol-cleanable, 80–1700 µL volume range) and sterile, EtO-sterilized polystyrene 96-well plates (270–350 µL, flat- or round-bottom options)
- REDFLASH technology in 96-well format: red-light excitation (625 nm) and near-infrared emission (>780 nm) minimize autofluorescence interference from chlorophyll, GFP-expressing embryos, or turbid media
- Integrated drift compensation algorithms and automatic zero-point calibration using nitrogen-saturated and air-saturated reference wells
Sample Compatibility & Compliance
The system is validated for use across a broad spectrum of aquatic model systems including phytoplankton (e.g., Chlamydomonas reinhardtii, diatoms), zooplankton (e.g., Daphnia magna, copepods), fish embryos (Danio rerio, Notothenia coriiceps), coral planulae, bivalve larvae, and isolated tissue explants. All hardware and software comply with GLP-aligned data integrity requirements: audit trails, user access control, electronic signatures, and full traceability of calibration events and raw signal logs. Data export formats (CSV, HDF5, .mat) support integration into LIMS environments and are compatible with FDA 21 CFR Part 11–compliant validation packages upon request. The 96-well configuration meets ISO 20594:2022 (Microplate-based assays for environmental toxicity testing) and OECD Test Guideline 211 (Daphnia magna Reproduction Test) auxiliary respirometric endpoints.
Software & Data Management
The EcoTech RespiroControl Suite provides synchronized acquisition, visualization, and kinetic analysis across up to three independent readers within a single GUI window. Real-time oxygen concentration curves are automatically converted to oxygen consumption rates (OCR, pmol O₂/min/cell or nmol O₂/h/mg tissue) using built-in chamber volume correction, temperature compensation (via integrated Pt100 sensor), and barometric pressure normalization. Advanced features include: (1) multi-phase respirograms with programmable gas-switching triggers; (2) batch-wise normalization to protein/DNA content or cell count inputs; (3) automated identification of linear metabolic phases for rate calculation; (4) export of QC metrics (R² of linear fit, signal-to-noise ratio, baseline stability index). Raw data files retain full metadata (timestamp, sensor ID, calibration history, environmental conditions), enabling retrospective reprocessing and regulatory audit readiness.
Applications
This system serves as a core instrumentation platform in multiple domains requiring quantitative, high-replication metabolic phenotyping. In environmental toxicology, it supports standardized assessment of sublethal respiratory inhibition following exposure to emerging contaminants (e.g., 6PPD-quinone, tire leachates) as published in Science of the Total Environment (Ricarte et al., 2023) and Marine Pollution Bulletin (Scovil et al., 2023). In climate change biology, it enables precise Q₁₀ determination and Arrhenius activation energy modeling for embryonic development under thermal stress—work cited in PeerJ (Glass et al., 2023) and Comparative Biochemistry and Physiology (Göpel & Burggren, 2024). In marine ecology, it quantifies species-specific metabolic scaling relationships in Arctic copepods (Karlsson & Søreide, 2023) and coral larval energetics under nutrient enrichment (Serrano et al., Coral Reefs, 2018). Additional applications include mitochondrial toxicology screening, enzyme kinetics (e.g., cytochrome c oxidase activity), and micro-scale bioreactor process monitoring.
FAQ
Can the system measure both oxygen consumption and production simultaneously?
Yes—by configuring alternating light/dark cycles in photosynthetic samples (e.g., algae, coral symbionts), net O₂ evolution and dark respiration can be resolved within a single assay run.
Is sterilization of the 24-well glass plates possible between experiments?
Yes—borosilicate plates tolerate autoclaving (121°C, 20 min), ethanol immersion (70–100%), and UV-C irradiation (254 nm, 30 min), with no measurable sensor degradation after 50+ cycles.
How is temperature controlled during measurement?
The compact reader footprint allows direct placement inside commercial incubators (±0.1°C stability) or on temperature-regulated shaker platforms; optional external Pt100 probe input enables real-time thermal correction of oxygen solubility and diffusion coefficients.
Does the software support custom kinetic modeling?
Yes—Python and MATLAB APIs are provided for importing raw phase-lifetime data and implementing user-defined models (e.g., Michaelis-Menten respiration kinetics, exponential decay fitting for hypoxia recovery).
What regulatory documentation is available for GxP environments?
IQ/OQ/PQ protocols, 21 CFR Part 11 validation templates, and ISO/IEC 17025-compliant uncertainty budgets are available upon request through EcoTech’s Technical Support Portal.
