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Water Quality AnalyzersTotal Organic Carbon (TOC) Automatic Analyzers

TOC-200 series

TOC-200 series of water quality analyzers


Available for all types of samples, from source samples to discharge monitoring samples

The Toray TOC automatic analyzers rapidly and accurately perform automatic analysis of total organic carbon content such as in rivers, lakes and marshes, sea areas and plant wastewater, in either online or offline.
The TOC analyzers use Toray’s unique low temperature sealed combustion system, providing stable measurement for long periods. These devices, are based on our technology over four decades and plentiful track records, are economical priced, easy operating, space saving by size reduction.


Our TOC analyzers support various measurements points, from high concentration to low concentration, such as from wastewater to rainwater, and providing stable measurement.


  • 650°C sealed combustion, the industry’s lowest temperature, reduces the frequency with which catalyst maintenance is required
  • Unique catalyst design and pre-processing filter ensure stable measurement of samples containing high concentrations, such as suspended matter and seawater samples
  • New sample line cleaning function, which uses acidic solution and minimum sample tube internal diameter of ⌀2 mm, helps prevent contaminants from impacting results and reduces adherence of suspended matter
  • Lineup of four models to suit individual uses


Shared specifications TOC-200 series
Measurement range 0-5 to 1,000 mg/L (optional range: 0-150 to 3,000 mg/L)
Measurement mode Online TOC, Offline TOC, and Offline TC
Measurement cycle 4 minutes or greater (TC measurement), 5 minutes or greater (TOC measurement)
Measurement method Total carbon measurement Automatic intermittent sealed combustion infrared analysis
Inorganic carbon removal Automatic intermittent hydrochloric acid aeration method
Measurement value conversion function Contains function for converting from TOC to COD or BOD
(conversion value = a+bx Coefficients a and b are customer-defined)
Linearity/repeatability The greater of the following: ±2% FS or less or ±0.15 mg/L or less
Zero/span stability The greater of the following: ±2% FS/day or ±0.15 mg/L/day or less
Ambient temperature change The greater of the following: ±2% FS/5°C or less or ±0.15 mg/L/5°C or less
Measurement value output DC 4 to 20 mA (load resistance: 0 to 500 Ω)
Transmission output USB (options: RS-232C, RS-485)
Input signal Non-voltage contact, DC24V
Items: External link, stop measurement, release alarm
Output signal Non-voltage contact, AC 125 V 1 A (resistance load)
Items: Maintenance in progress signal, Power failure signal, External pump signal, Count signal, and Selectable output
Abnormal measurement value (selectable output) Upper upper limit, upper limit, lower limit, lower lower limit
Device error (selectable output) Abnormal temperature, sample supply interrupted, pipe cleaning fluid supply interrupted (can be assigned as desired for major/minor failures)
(Options: Gas pressure drop, Test reagent supply interrupted, and Cleaning fluid supply interrupted)
Other options Recording meter, automatic calibration function, separate printer, electrical component air purge, load amount calculation unit
Sample conditions ACF inlet: 0.05 to 0.15 MPa, 3 L/min or greater, 1 to 50°C
ACF inlet: 0.05 to 0.15 MPa, 3 L/min or greater, 1 to 50°C
(Please consult with us regarding situations in which the temperature will normally be 40°C or greater)
(Device inlet: 0.02 to 0.1 MPa, 500 mL/min or greater, 1 to 50°C)
Offline sample amount 200 to 500 mL/3 measurements (for offline TOC measurement roughly 1,000 mL/3 measurements)
Test reagent For 2 mol/L-HCL5 minute measurement interval, approximately 5 L/month
For 60 minute measurement interval approximately 5 L/year (if pipe cleaning is not performed)
Cleaning fluid Distilled water
Reverse cleaning water 0.1 to 0.4 MPa flow: 3 to 5 L/min, 1 to 50°C
(do not use reverse cleaning water which contains organic carbon or detritus, etc., or which chemically reacts with samples)
Pipe cleaning water 0.02 to 0.05 MPa, 0.4 to 0.6L/min, 1 to 50°C
(do not use water which contains organic carbon or detritus, etc.)
Carrier gas 0.3 MPa nitrogen (99.9% or greater) or instrumentation compressed air Approx. 7 Nm3 /month
(when using instrumentation compressed air a CO2elimination filter is required, and the instrumentation compressed air cannot contain moisture or oil)
Power AC 100 V±10 V, 600 VA, power consumption: Approx. 350 W (multistream model: 450 W)
Installation location Indoors 1 to 40°C (avoid environments with corrosive gasses such as hydrogen sulfide)
External dimensions/weight 550 mm (W) ×538 mm (D)×1430 mm (H)mm(not including 70 mm casters),  Approx. 100 kg
Anchor mounting dimensions 4-φ13 510 mm (W) ×457 mm (D)
Service area Front, left, and right sides 600 mm (not needed for rear side)
Individual model specifications TOC-200S TOC-200SD TOC-200M TOC-200MD
Stream switching 1 stream 1 stream Up to 8 streams Up to 8 streams
Dilution function None 2 to 20x None 2 to 20x
Number of selectable outputs 8 8 16 16
Measurement mode Cycle measurement, random measurement
Multistream input signal Per-stream measurement start signal input
Multistream output signal Per-stream abnormal measurement value signal output

Automatic cleaning filter

Our automatic cleaning filters, developed in-house, are sample filtration preprocessing devices which consist of net-less elements made up of stacked circular disks and cleaning blades. The ACF element component uses a roughly 100 gauge net (equivalent to 147 μm) to catch matter suspended in samples.

The suspended matter is scraped off by the cleaning blades, washed off by the flow of excess sample, and evacuated via the drain.

Options such as a reverse cleaning function using cleaning water and functions for controlling element pass-through time are also available to reduce the amount of element clogging.


  • East Japan : +81-3-5962-9775

    West Japan : +81-77-544-6224