The EZ Series Online Analysers offer multiple options to monitor Chemical Oxygen Demand (COD) in water. Typical applications are wastewater and surface water. The EZ7000 Series COD Analysers are single-parameter titrators.
| Weight | 25 kg |
| Flow Rate | 100 - 300 mL/min |
| Alarm | 1 x malfunctioning, 4 x user-configurable, max. 24 VDC/0.5 A, potential free contacts |
| Analog outputs | Active 4 - 20 mA max. 500 Ohm load, standard 1, max. 8 (option) |
| Dimensions (H x W x D) | 690 mm x 465 mm x 330 mm |
| Instrument air | Dry and oil free according to ISA-S7.0.01-1996 quality standard for instrument air |
| Demineralised water | For rinsing |
| Digital outputs | Optional: Modbus (TCP/IP, RS485) |
| Verification | Automatic; frequency freely programmable |
| Accuracy | Better than 5% full scale range for standard test solutions |
| Drenaj | Atmospheric pressure, vented, min. Ø 32 mm |
| Power | 230 VAC, 50/60 Hz 120 VAC, 50/60 Hz Max. power consumption: 440 VA |
| Warranty | 24 aylar |
| Interferences | Chloride > 1 g/L, inorganic reducing agents such as nitrites, sulphides and iron(II) will increase the result, aromatic hydrocarbons and pyridine are not oxidized to any appreciable extent. Some very volatile organic substances may escape the oxidation by evaporation. Straight chain aliphatic compounds are effectively oxidised by the silver sulphate/sulphuric acid solution. Fats, oil, proteins, surfactants and tar. |
| Calibration | Automatic, 2-point; frequency freely programmable |
| Protection class | Analyser cabinet: IP55 / Panel PC: IP65 |
| What's in the box | EZ7050 COD Analyser, Instruction Manual, 1 x Double Bit Door Key, 1 x Mounting Brackets, 1 x Combined Pt Electrode, Routine S7 Connection, 1 x empty 2.5L Reagent Container with Fittings (AgNO₃ Solution), 2 x empty 10L Reagent Containers with Fittings (Acid & Oxalate Solution) and 1 x empty 10L Reagent Dark Container with Fittings (KMNO₄ Solution) |
| Malzeme | Hinged part: Thermoform ABS, door: PMMA Wall section: Galvanised steel, powder coated |
| Number of sample streams | 1, 2, 4, or 8 |
| Sample pressure | By external overflow vessel |
| Sample quality | Maximum particle size 100 µm, < 0.1 g/L; Turbidity < 50 NTU |
| Sample temperature | 10 - 30 °C |
| Measuring range | 1 - 20 mg/L O 2 1 - 20 mg/L O₂ |
| Measurement method | Redox titration after oxidation by acid-potassium dichromate solution, conform with ISO 6060 method Or redox titration after oxidation by potassium permanganate solution, conform with ISO 8467 and JIS K0806 methods |
| Measurement time | 40 minutes, including oxidation time of 30 minutes. Remark: standard method for Cr destruction requires 120 minutes. |
| Ambient temperature | 10 - 30 °C ±4 °C deviation at 5 - 95% relative humidity (non-condensing) |
| Parameter | COD |
| Reagent requirement | Keep between 10 - 30 °C |
| Detection limit | ≤ 1 mg/L |
| Certifications | CE compliant / UL certified |
| Cooling water | Flow rate approx. 5 L/h; temperature max. 30 °C; pressure max. 0.5 bar |
| Earth connection | Dry and clean earth pole with low impedance (< 1 Ohm) using an earth cable of > 2.5 mm² |
| Part No. | Description | Product description | Parameter | Measuring range | Output |
|---|---|---|---|---|---|
| EZ7050.XXXXXXXX | EZ7050 Chemical Oxygen Demand Analyser (COD, Permanganate Method) | EZ7050 Chemical Oxygen Demand Analyser (COD, Permanganate Method) | COD | 1 - 20 mg/L O 2 |
Request a quote for pricing and lead time; you can mention the part number you are interested in your message.
The EZ Series Online Analysers offer multiple options to monitor Chemical Oxygen Demand (COD) in water. Typical applications are wastewater and surface water.
The EZ7000 Series COD Analysers are single-parameter titrators.
Permanganate method:
- EZ7050, 1 - 20 mg/L O₂
- EZ7051, 20 - 200 mg/L O₂
Options for all analysers include:
- Multiple stream analysis (1-8 streams) reducing cost per sampling point
- Analogue and/or digital outputs for communication
Some applications may require the use of a sampling/filtration or an external dilution system for sample preconditioning. For this option please check the EZ9000 Sample Preconditioning page.
Need support or a different configuration for your online COD analyser? Please contact us.
Product code: EZ7050.XXXXXXXX
IN THE SAME CATEGORY
The Hach EZ Series Ammonium Analysers provide reliable, continuous online monitoring of ammonium and ammonia (NH₄/NH₃) across a wide range of water and wastewater applications, including municipal wastewater treatment, drinking water, …
For drinking water, fluoridation systems, and industrial wastewater treatment, Industrial Fluoride Removal Process, the Hach EZ Series Fluoride Analysers provide reliable, continuous fluoride measurement using proven Ion Selective…
The EZ sc Series Online Analysers offer multiple options to monitor Phosphate in water. Typical applications are wastewater, drinking water, steam & power generation, surface water.
The EZ sc Series Online Analysers offer multiple options to monitor Silica in water. Typical applications are steam & power generation, surface water, process water. The EZ1000sc Series Analysers use colorimetric analysis to measure Silica.
