HACH HT200S High-Temperature Block Digestion System
| Brand | HACH |
|---|---|
| Origin | Shanghai, China |
| Model | HT200S |
| Digestion Positions | 12 × 20 mm |
| Temperature Range | 40–170 °C |
| Temperature Accuracy | ±1 °C |
| Heating Principle | Electric Resistance Heating |
| Cooling | Integrated Active Air-Cooling System |
| Programmable Methods | 3 Predefined (100 °C, 148 °C, HT) + 9 User-Defined |
| Display | Dual-Line LCD |
| Power Supply | 230 V ±5%/−15%, 50 Hz, 1300 VA |
| Safety Certifications | CE, GS, cTUVus |
| Dimensions (W×D×H) | 330 × 300 × 430 mm |
| Weight | 12 kg |
| Operating Environment | 10–45 °C, ≤90% RH |
| Compliance | EN ISO 6060 (COD), EPA Method 410.4, ASTM D1252 |
Overview
The HACH HT200S High-Temperature Block Digestion System is an electrically heated, fully automated digestion platform engineered for rapid, reproducible sample preparation in compliance with standardized chemical oxygen demand (COD), total phosphorus (TP), total nitrogen (TN), and heavy metal digestion protocols. Utilizing High-Speed Digestion (HSD) technology, the HT200S achieves precise thermal ramping and controlled cooling within a single integrated block—eliminating external water baths or manual transfer steps. Its Peltier-assisted active air-cooling system reduces post-digestion wait time significantly: from 148 °C to safe handling temperature in under 8 minutes, enabling full COD analysis—including digestion, cooling, and spectrophotometric measurement—in approximately 35 minutes. The unit operates on a robust stainless-steel heating block with uniform thermal distribution across all 12 positions, ensuring inter-sample consistency critical for regulatory reporting and quality control workflows.
Key Features
- Fully automated operation with programmable start/stop timing, temperature ramping profiles, and method recall—minimizing operator intervention and procedural variability.
- Integrated safety lock mechanism that engages automatically when block temperature exceeds 80 °C, preventing accidental lid opening during high-temperature cycles.
- Dual-line LCD interface with intuitive navigation for selecting among three factory-calibrated methods (100 °C, 148 °C, High-Temp) and nine customizable user-defined programs.
- Thermal stability of ±1 °C across the full operating range (40–170 °C), validated per EN ISO 6060 and EPA Method 410.4 requirements for COD digestion accuracy.
- Compact benchtop footprint (330 × 300 × 430 mm) with 12-position 20 mm diameter well configuration—compatible with standard HACH TNTplus vials and optional 13 mm or 16 mm adapters (HHA155, LTV077).
- Comprehensive electrical safety certification: CE, GS, and cTUVus—ensuring conformance with IEC 61010-1 for laboratory electrical equipment.
Sample Compatibility & Compliance
The HT200S accommodates standard 20 mm round-bottom digestion vials used in HACH’s TNTplus reagent system, including pre-filled COD, TP, and TN test kits. With optional adapters, it supports 13 mm and 16 mm vial formats for method flexibility. All digestion protocols align with internationally recognized standards: ISO 6060 (water quality—determination of chemical oxygen demand), EPA Method 410.4 (COD by closed reflux, colorimetric), and ASTM D1252 (COD by open reflux). The instrument’s thermal performance has been verified under GLP conditions; its digital log records timestamped temperature profiles, method IDs, and cycle completion status—supporting audit readiness for ISO/IEC 17025-accredited laboratories.
Software & Data Management
While the HT200S operates as a standalone hardware platform without embedded PC connectivity, its method-driven architecture ensures seamless integration with HACH’s DR series spectrophotometers (e.g., DR3900, DR6000) via direct serial handshake. When paired with HACH’s AquaTrack software or LabX (via optional RS232-to-USB adapter), full traceability is achieved: digestion parameters are auto-tagged to corresponding absorbance measurements, generating compliant data packages with electronic signatures, audit trails, and version-controlled method files. All internal logs retain ≥1000 completed cycles with date/time stamps, meeting FDA 21 CFR Part 11 requirements when deployed within validated networked environments.
Applications
The HT200S serves as a core sample preparation module in environmental monitoring labs (municipal wastewater, industrial effluent), food safety testing facilities (digestion prior to ICP-OES analysis of trace metals), agricultural soil labs (total Kjeldahl nitrogen determination), and petroleum QA/QC departments (hydrocarbon matrix digestion for PAH quantification). Its rapid turnaround and consistent thermal delivery make it especially suitable for high-throughput COD compliance reporting under EU Urban Wastewater Treatment Directive (91/271/EEC) and U.S. Clean Water Act discharge monitoring programs.
FAQ
Does the HT200S support method validation per ISO/IEC 17025?
Yes—the instrument provides documented thermal uniformity data, calibration certificates for temperature sensors, and cycle logging capabilities required for method verification.
Can the HT200S be used for mercury digestion per EPA Method 7471B?
It is compatible with EPA 7471B when configured with appropriate acid mixtures and capped vials; however, users must validate digestion efficiency for their specific matrices.
Is remote monitoring or Ethernet connectivity available?
No native Ethernet or Wi-Fi; communication is limited to RS232 serial output for integration with spectrophotometers or third-party LIMS via protocol translation.
What maintenance is required for long-term thermal accuracy?
Annual verification of block temperature uniformity using NIST-traceable thermocouples is recommended; no routine recalibration is needed if operated within specified ambient conditions.
Are consumables included with initial purchase?
No—vials, caps, and reagents (e.g., TNTplus COD vials) are ordered separately; adapter kits (LTV077, HHA155) are optional accessories.
