QL3580I Condensate TOC analyzer

Measuring method

• 1. The water sample enters the reactor and reacts with acid, at which point the inorganic carbon in the water sample is converted into carbon dioxide;

• 2. Using carbon dioxide-free air (instrument air) as the carrier gas, the carbon dioxide converted from inorganic carbon is purged out, and at this point the total inorganic carbon (TIC) can be measured by detection with an NDIR detector;

• 3. The water sample from which TIC (total inorganic carbon) has been removed is then subjected to oxidation;

• 4. After oxidation is completed, the carbon dioxide converted from organic carbon is purged out by the carrier gas and detected by the NDIR detector to obtain the total organic carbon (TOC) content.

Instrument features

• The QL3580I condensate total organic carbon analyzer uses UV persulfate oxidation, suitable for total organic carbon detection in industrial condensate

• The QL3580I condensate total organic carbon analyzer uses a 4 mm inner diameter sample line, allowing soft particles up to 2 mm in inner diameter to pass through, and routine samples require no filtration treatment

• The QL3580I condensate total organic carbon analyzer's unique two-point automatic calibration function reduces additional maintenance workload for operators, and sequential batch measurement reduces reagent consumption

• The QL3580I condensate total organic carbon analyzer's analysis process does not use alkaline reagents, effectively reducing the difficulty for operators to prepare reagents and eliminating measurement interference caused by carbon dioxide dissolving into alkaline reagents

• Low maintenance, low maintenance cost

• The QL3580I condensate total organic carbon analyzer has a more user-friendly human-machine interface: equipped with a high-definition touchscreen, featuring a user-friendly operating interface and instrument ports, enabling quick and convenient data download and software updates, and a multi-level management mode for convenient instrument management by users

• The QL3580I condensate total organic carbon analyzer has a smaller footprint, providing more flexible installation options; it can be used with an explosion-proof cabinet in explosion-proof environments or used standalone, saving more installation space.

Technical specifications

• Measuring parameters    TOC (NPOC)/TIC

• Oxidation method    UV persulfate oxidation

• Measuring method    After the water sample is oxidized, the carbon dioxide concentration is measured with an NDIR detector

• Measuring range    0-25 ~ 0-100 mg C/L (automatic range switching)

• Lowest detection limit    0.5 mg C/L

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

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

• Zero drift    Within ±2% f.s./day

• Range drift    Within ±2% f.s./day

• Analysis time    7 minutes (TOC)

• Measuring interval    Adjustable (in minutes)

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

• Sample requirements    Flow rate: ≥100 mL/min

• Particle size: ≤2 mm, soft particles

• Sample pressure: ≤1 bar

• Carrier gas    Carbon dioxide-free instrument air:

• Source pressure: 50~120 PSIG

• Dew point: -20 ℃ (remove moisture and oil vapor)

• Instrument gas consumption flow rate: max. 1.7 L/min

• Water sample temperature    5℃– 45℃

• Maintenance interval    Once every 3 months

• Protection class    IP44

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

• Relay output    2 relays (24 V 4 A dry contacts)

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

• Data storage    9999 analysis data records, 99 fault messages

• Power supply    100 – 240 V AC, 50/60 Hz

• Dimensions    750 × 500 × 320 mm

• Weight    55 Kg

Ordering information

Main unit

• 8653600    QL3580I online total organic carbon analyzer (with enclosure), 0-25 ppm, 0-100 ppm (automatic range switching)

• 8651600    QL3580I online total organic carbon analyzer (without enclosure), 0-25 ppm, 0-100 ppm (automatic range switching)

• Other spare parts and annual maintenance kits

• 9998600    QL3580I NDIR carbon dioxide detector

• 9789600    Circulation pump dedicated tubing kit

• 8654000    Peristaltic pump tubing kit

• 8651200    QL3580I (with enclosure) annual maintenance kit

• 8651300    QL3580I (without enclosure) annual maintenance kit

Source: Public information from the HACH water quality website