QL3580 Online TOC analyzer

 Measuring method:

• 1) When the TOC total organic carbon analyzer uses pure oxygen as carrier gas, it uses a combined oxidation method of UV persulfate and hydroxyl radicals to oxidize organic substances in water, and uses NDIR to measure the carbon dioxide concentration, thereby completing the TOC determination in water.

• 2) When the TOC total organic carbon analyzer uses instrument air as carrier gas, it uses the UV persulfate oxidation method to oxidize organic substances in water, and uses NDIR to measure the carbon dioxide concentration, thereby completing the TOC determination in water.

Instrument features:

• 1) The QL3580 TOC total organic carbon analyzer is specially developed and designed for the pollution source market, accurately measuring the organic content at pollution source discharge outlets.

• 2) It has a TOC/COD conversion function, enabling the QL3580 TOC total organic carbon analyzer to accurately measure the organic content in water.

• 3) The TOC total organic carbon analyzer has low maintenance requirements/costs: 4 mm inner diameter sample tubing, built-in flow cell, no sample pretreatment required, saving pretreatment costs.

• 4) The TOC measurement process does not use alkaline reagents, eliminating measurement interference caused by carbon dioxide dissolving into alkaline reagents, and effectively reducing the difficulty for operators to prepare reagents.

• 5) Friendly human-machine interface: The TOC total organic carbon analyzer is equipped with a high-definition touch screen, convenient data download and software updates, and a multi-level management mode for convenient user management of the instrument.

Technical specifications

• Measuring parameters    TOC (NPOC)/TIC/COD*

• *Based on the TOC measurement result, the COD concentration is obtained using the relevant conversion function

• Oxidation method    Combined oxidation method of UV persulfate and hydroxyl radicals - when pure oxygen is used as carrier gas

• UV persulfate oxidation - when instrument air is used as carrier gas

• Measuring method    After the water sample is oxidized, the carbon dioxide concentration is detected using NDIR

• Sample introduction requirements    Flow rate: ≥100 ml/min

• Particle size: ≤2mm, soft particles

• Sample introduction pressure: ≤1bar

• Carrier gas    Oxygen: (using an oxygen generator)

• Power supply voltage and frequency : 220V AC/50Hz(±10%)

• Oxygen concentration : >92%

• Pressure : >0.05MPa

• Oxygen consumption flow rate: maximum 1.7L/min

• Carbon dioxide-removed instrument air:

• Source pressure: 50~120PSIG

• Dew point : -20℃ (removal of water vapor and oil vapor)

• Instrument gas consumption flow rate: maximum 1.7L/min

• Water sample temperature    5oC – 45oC

• Analysis time    7 minutes (TOC);

• 7-18 minutes (COD)

• Measuring interval    Adjustable (in minutes)

• Repeatability    TOC: ±0.5 mgC/L or ±2% of reading (whichever is greater); TIC: ±4% of reading

• Accuracy    ±0.5 mgC/L or ±3% of reading (whichever is greater)

• Minimum detection limit    0.5 mgC/L

• Zero drift    Within ±2%f.s./day

• Span drift    Within ±2%f.s./day

• Interference    Possible turbidity, fat, oil, protein, and tar may interfere with the measurement results

• Maintenance interval    Once every 3 months

• Protection class    IP44

• Signal output    0/4-20 mA, Modbus/RTU RS485

• Relay output    Four relays (24 V 2A, dry contacts)

• Display    7-inch, 800 × 480 pixels (4:3) TFT-LCD touch screen

• Data storage    9999 analysis data records, 99 fault messages

• Power supply    100 - 240V, 50/60Hz

• Dimensions    1100 x 560 x 370 mm

• Weight    65 Kg

Ordering guide

Main unit

• 8653800    QL3580 online total organic carbon analyzer, 0-100ppm, 0-800ppm

• Required accessories (choose one)

• 8663500    Oxygen generator

• 9781800    Pressure-reducing filter

• Other accessories and spare parts

• 8662100    NDIR carbon dioxide detector 252

• 8662200    Pressure-free regulating valve

• 9789300    QL3580 annual maintenance kit

• 8654000    Circulation pump dedicated tubing kit

• 8654100    Peristaltic pump tubing kit

Source: Public information from the HACH Water Quality website