High-Precision Smart COD Reactors & Thermal Digestion Heating Blocks

As an ISO-certified laboratory equipment manufacturer, Hangzhou Qiwei Instrument Co., Ltd. produces commercial-grade COD Reactors (Thermal Digestion Blocks) engineered for wastewater treatment plants, environmental testing laboratories, industrial effluent pre-treatment, and water research.

Engineered in strict compliance with ISO 15705 and USEPA digestion guidelines, our COD heating blocks provide rapid heating (up to 200°C), microcomputer PID digital temperature control ($\pm 1^\circ C$), transparent anti-explosion safety shields, and multi-parameter digestion programs (COD, Total Phosphorus, Total Nitrogen).

Get Bulk Wholesale Quote Download COD Reactor Specification

COD Heating Digester
Model: COD-25, QW-COD-9
Temperature Control: 45~190 °C
Digestion Time: 0~720 minutes
Temperature Indication Error: ±2 °C
Temperature Field Equilibrium: ≤ 2 ℃
Thermostatic COD Digester
Model: COD-HX
Temperature Range: 32°C ~ 399°C
Accuracy: ±2°C
Heating Time: (170°C) < 30 min
COD Digester
Model: HW6, HW8
Quantity of Tubes: 6-tube, 8-tube
Measuring Range: 0～700 mg/L; sample can be diluted if exceeding the range
Reflux Device: Three-ball burr reflux condenser +...

Explore Our COD Digestion Reactor Series

Versatile thermal heating blocks tailored for high-throughput batch sample digestion in certified environmental laboratories.

1. Standard 12/16 Vial COD Reactors

Compact benchtop digestion units featuring 16mm reaction vial wells, pre-set 150°C 2-hour COD timer mode, digital temperature displays, and transparent safety covers.

Vial Capacity: 12 or 16 Wells ($\phi 16\,mm$)
Heating Speed: Ambient to 150°C in < 10 mins
Pre-set COD (150°C, 120 min) & fast COD (165°C, 15 min)

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2. High-Capacity 25-Vial / Dual-Zone Digesters

Designed for high-throughput testing centers, featuring independent dual heating blocks that allow simultaneous digestion at different temperatures (e.g., COD at 150°C & Total Nitrogen at 125°C).

Vial Capacity: 25 Wells ($\phi 16\,mm$)
Dual independent temperature zone control
Audible completion alarm & over-temp auto cut-off

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3. Complete Digestion & Photometer Bundles

Integrated wastewater testing kits containing a smart COD reactor, pre-dosed digestion reagent vials, and a portable photometer for turnkey COD, TP, and TN compliance analysis.

Turnkey kit for total wastewater monitoring
Includes pre-dosed sealed reagent vials
Reduces procurement costs for municipal projects

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Critical Industrial Applications & Engineering Strengths

Why Thermal Digestion Reactivity is Essential

Chemical Oxygen Demand ($COD$) requires sealed reflux digestion at elevated temperatures to fully oxidize organic contaminants. Qiwei COD Reactors support essential testing workflows across:

Municipal Wastewater Treatment Plants: Sample digestion for raw sewage, aeration tanks, and final discharge
Industrial Wastewater Compliance: Fast 15-minute high-temp digestion for textile, chemical, and paper effluent
Total Phosphorus & Total Nitrogen Testing: Potassium persulfate high-temperature digestion ($120^\circ C - 125^\circ C$)
Environmental Testing Agencies: ISO 15705 sealed tube method compliant sample preparation

Qiwei Technical & OEM Advantages

Supporting global laboratory suppliers, environmental engineering contractors, and instrument distributors:

High Temperature Uniformity: Solid aluminum heating block ensures $\le \pm 0.5^\circ C$ well-to-well thermal uniformity
Comprehensive Safety Features: Polycarbonate protective shield, over-temperature thermal fuse, and insulated outer casing
OEM & ODM Customization: Custom heating block well diameters ($\phi 16\,mm, \phi 20\,mm$), logo printing, and voltage customization (110V/220V)
Internal Links: Combine with our COD Analyzers, TN Testers, TP Testers, and Spectrophotometers for complete laboratory setup.

Frequently Asked Questions (COD Reactor Sourcing Guide)

Q1: What digestion parameters do Qiwei COD Reactors support?

Our reactors feature pre-programmed digestion profiles: COD Standard (150°C, 120 min), COD Fast Method (165°C, 15 min), Total Phosphorus (120°C, 30 min), and Total Nitrogen (125°C, 30 min), as well as fully customizable user-defined temperature/time settings up to 200°C.

Q2: Are Qiwei COD digestion blocks compatible with standard 16mm reagent vials?

Yes, our standard heating blocks are engineered with precision $\phi 16\,mm$ wells, making them universally compatible with standard pre-dosed COD sealed digestion tube vials from all major global reagent brands.

Q3: Do you support OEM custom branding and wholesale distributor pricing?

Yes, as a direct factory manufacturer, we offer complete OEM/ODM custom branding, customized block well sizes, custom outer casing colors, and tiered volume discounts for global laboratory suppliers.

Require Factory Direct Pricing or Custom Thermal COD Digestion Equipment?

Get in touch with Hangzhou Qiwei Instrument today for technical consultation, block configurations, and competitive distributor pricing within 24 hours.

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Hangzhou Qiwei Instrument Co., Ltd. is one of the most reliable manufacturers and suppliers of cod reactor in China, featured by quality products and good service. Please rest assured to buy bulk durable cod reactor in stock here from our factory. We also accept customized orders.

Thermostatic COD Digester