National Standard COD Digester

Model：

HD-W110X

Introduction：

COD Digester (National Standard COD Digester) performs reflux digestion of water samples for COD determination per HJ828-2017. Widely used for environmental protection, research, papermaking, petrochemical and metallurgy....

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Technical Specifications
Product video

I. Product Introduction

The intelligent COD reflux digester follows the basic principle of the national standard HJ 828-2017 "Water quality - Determination of chemical oxygen demand - Dichromate method". It guarantees the two-hour reflux digestion at micro-boiling temperature, and the preparation and addition of the reagent solutions are identical to those of the standard method, which ensures reliable and accurate analytical results.

II. Application Range

It is widely used for the digestion of chemical oxygen demand samples in environmental protection, scientific research, papermaking, petrochemicals, metallurgy and printing and dyeing.

III. Product Features

1	Independent temperature control	ten independent heating channels work simultaneously without interfering with each other; the digestion temperature of each channel can be set individually according to the characteristics of the water sample, ensuring that every sample reaches the required micro-boiling state.
2	One-key start	in intelligent mode a single key press starts the programmed sequence of heating, digestion, reflux and cooling for every digestion unit.
3	Rotating base plate	the heating plate can rotate 360° to the left and right, so that the operator can observe the digestion state in real time and add consumables or remove samples quickly.
4	Controllable parameters	the heating temperature reaches up to 400 °C and the digestion and cooling times can be freely set from 1 to 1439 min, which improves the versatility and scalability of the instrument.
5	Convenient operation	the main interface is arranged in two screens that can be swiped to start an experiment or set the temperature, and the system settings page provides time, network and language options.
6	Clear display	a built-in 7-inch colour LCD touch screen can be tilted from 0° to 90°, giving an excellent viewing angle when seated or standing, and shows the status of every unit together with the digestion and cooling countdowns.
7	Voice prompts	spoken messages announce that the digestion temperature has been reached, that cooling has finished, that the experiment has ended and that the temperature is too high.
8	Online upgrade	Wi-Fi connectivity allows software to be received and updated automatically, improving performance and adapting the instrument to new water quality standards.
9	Method storage and recall	multiple user-defined methods can be saved and applied with one key, avoiding repeated editing of temperature and time.
10	Copy function	the parameters set for one channel can be copied to the other nine channels with one key.
11	Standard compliance	designed and manufactured in accordance with HJ 828-2017 "Water quality - Determination of chemical oxygen demand - Dichromate method".

IV. Technical Parameters

Display	7-inch high-definition colour touch screen
Heating method	Independent temperature control, customized far-infrared black crystal panel, wear resistant
Batch capacity	10 samples
Heating flask	250 mL, 24/29 ground-joint flat-bottom conical flask with serrated reflux tube
Temperature range	Room temperature to 400 °C
Measurement method	HJ 828-2017 "Water quality - Determination of chemical oxygen demand - Dichromate method"
Digestion timer	1–1439 min
Cooling time	1–1439 min
Measurement range	0–700 mg/L; samples above 700 mg/L must be diluted
Measurement error	Potassium hydrogen phthalate standard solution (500 mg/L): relative standard deviation ≤ 5.0%; industrial wastewater (500 mg/L): relative standard deviation ≤ 7.0%
Cooling method	Air cooling / water cooling
Ambient temperature	5–40 °C
Ambient humidity	≤85% RH (non-condensing)
Instrument power	3000 W
Method storage	Multiple methods can be stored and applied with one key
Language	Chinese by default; English can be selected manually
Power supply	AC 220 V / 50 Hz
Dimensions	470 × 540 × 670 mm
Main unit weight	18.6 kg (excluding glassware)

The video is currently in production, please stay tuned......

National Standard COD Digester

I. Product Introduction

II. Application Range

III. Product Features

IV. Technical Parameters

Shandong Horde Electronic Technology Co., Ltd.

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