Hach DRB100 Portable COD Digestion Reactor

Overview

The Hach DRB100 Portable COD Digestion Reactor is a compact, field-deployable thermal digestion system engineered for precise, reproducible oxidation of organic matter in water and wastewater samples. It operates on the principle of sealed-tube, micro-reflux digestion—where samples are heated under controlled temperature and time conditions in closed 16 mm borosilicate glass tubes containing standardized oxidants (e.g., potassium dichromate in sulfuric acid). This method ensures complete oxidation of organic carbon to CO₂ while minimizing reagent loss, vapor escape, and cross-contamination. Designed specifically for compatibility with Hach’s portable photometers (DR1900, DR900) and laboratory spectrophotometers, the DRB100 delivers traceable, metrologically sound digestion results essential for regulatory-compliant COD, total phosphorus, total nitrogen, and ammonia nitrogen analysis. Its lightweight aluminum housing, integrated ceramic heating element, and intelligent PID temperature algorithm enable stable thermal control across variable ambient environments—from air-conditioned labs to humid field sites or emergency response vehicles.

Key Features

• Sealed micro-reflux digestion architecture minimizes reagent consumption and eliminates open-vessel hazards associated with traditional reflux methods.
• Four independent 16 mm sample wells allow simultaneous processing of up to four samples with identical thermal profiles—ensuring inter-sample comparability and throughput efficiency.
• Precision temperature control from ambient to 180 °C with ±0.1 °C accuracy and ±1 °C stability over full operational range; validated per IEC 61000-4-30 for electromagnetic compatibility in mobile settings.
• Programmable digestion duration (0–120 minutes) with audible end-of-cycle alert and auto-hold function to prevent thermal drift during cooling phase.
• Optically transparent, heat-resistant polycarbonate safety shield provides full visual monitoring without compromising operator protection—certified to UL 94 V-0 flammability rating.
• DC 12 V power architecture enables seamless integration with optional 12 V/15 Ah rechargeable lithium battery packs (Hach Part No. 22.03.0001), supporting >8 hours of continuous operation in off-grid deployments.

Sample Compatibility & Compliance

The DRB100 is validated for use with standard Hach TNTplus vials (e.g., TNT820, TNT821, TNT822) and custom 16 mm OD borosilicate tubes meeting ASTM E438 Type I Class A dimensional tolerances. It supports digestion protocols aligned with ISO 6060:2022 (Water quality — Determination of chemical oxygen demand), ASTM D1252–22 (Standard Test Methods for Chemical Oxygen Demand of Water), and U.S. EPA Method 410.4. All thermal performance data are traceable to NIST-calibrated reference thermometers and documented in accordance with ISO/IEC 17025:2017 requirements for testing laboratories. The instrument’s mechanical design conforms to IP54 ingress protection standards, ensuring reliable operation in dusty or splashed environments typical of environmental emergency response scenarios.

Software & Data Management

While the DRB100 operates as a standalone hardware unit without embedded firmware or touchscreen interface, its thermal parameters are fully interoperable with Hach’s suite of data management tools. When paired with the DR1900 or DR900 photometers, digestion metadata—including temperature setpoint, duration, and batch ID—is automatically logged alongside absorbance readings in Hach’s LIMS-ready .csv export format. Full audit trail capability—including user login, parameter changes, and calibration history—is maintained when used within Hach’s AquaTrack™ software ecosystem, which complies with FDA 21 CFR Part 11 for electronic records and signatures in regulated laboratories.

Applications

• Field-based emergency response for industrial spill assessments, wastewater discharge verification, and post-disaster water safety screening.
• Routine compliance monitoring by municipal utilities, environmental consultancies, and third-party testing labs requiring GLP-aligned COD determination.
• Mobile laboratory configurations including Hach DREL1900 and CEL900 portable lab kits—enabling full analytical workflows from sample digestion through colorimetric quantification.
• Educational and research applications where portability, repeatability, and adherence to international digestion standards are critical.
• Calibration verification of online COD analyzers using reference digestions performed under identical thermal conditions.

FAQ

Is the DRB100 compatible with non-Hach digestion reagents?
Yes—provided reagents are formulated for sealed-tube micro-reflux digestion and packaged in 16 mm OD tubes conforming to ASTM E438 dimensional specifications.
Does the DRB100 require annual calibration certification?
While not mandated by regulation, Hach recommends biannual verification of temperature accuracy using a NIST-traceable thermometer per ISO/IEC 17025 internal quality control procedures.
Can the DRB100 be operated continuously for extended periods?
Yes—the unit features thermal overload protection and automatic duty-cycle modulation to sustain safe operation at 180 °C for up to 120 minutes per cycle, with ≤15-minute cooldown intervals recommended between consecutive batches.
What safety certifications does the DRB100 hold?
It meets UL 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and CE marking requirements under the EU Low Voltage Directive 2014/35/EU and EMC Directive 2014/30/EU.
Is firmware update support available for the DRB100?
No—the DRB100 is a thermally regulated analog device with no programmable microcontroller; all operational parameters are set via front-panel rotary encoder and retained in non-volatile memory without need for firmware intervention.