For Pure Water and Recycled Water Applications TOC-780

The TOC-780 is a high-sensitivity, automatic TOC analyzer which quickly and accurately measures the total organic carbon content of pure water, and water from rivers and other sources, in either online or offline mode.
This system is designed to achieve superior operability and save space, based on the previous TOC-700 Series which achieved high-speed response (90% response within 5 min) by employing a continuous measurement system developed using Toray Engineering's proprietary technology.


Principle of Measurement

After inorganic carbon is removed from sample water using an IC scrubber, organic carbon is oxidized and converted to carbon dioxide by adding an oxidant and irradiating with powerful UV rays in a UV reactor. Concentration of the converted carbon dioxide is measured with an infrared analyzer, and the TOC value is obtained from the calibration curve for carbon dioxide and TOC stored beforehand in the signal processing unit.


Measurement range TOC-780H :
0-1 / 0-10 mg/l
0-5 / 0-50 mg/l *1
0-10 / 0-100 mg/l *1
0-100 / 0-500 µg/l
Dilution function
Stream switching function
Measurement cycle Automatic continuous measurement
Measurement method Inorganic carbon removal: Automatic continuous acidic aeration method
Total carbon measurement: Automatic continuous low-temperature wet UV oxidation - infrared analysis method
Calibration method Span calibration: Manual
Zero calibration: Manual and automatic calibration
Conversion function
Range setting Manual setting, remote setting and automatic switching
Construction Standalone console, with casters
Dimensions 602W × 400D × 1300H mm
Weight Approx. 140 kg
Standard liquid Potassium hydrogen phthalate aqueous solution
Repeatability Within ±2 % of full scale
Zero stability Within ±2 % of full scale/day
Span stability Within ±2 % of full scale/day
Ambient temperature variation Within ±2 % of full scale/5 °C
Measurement value output External output: DC 4-20 mA
Range ID signal no-voltage contact: AC 125 V, 2 A
Error alarm indication LED display, Closed contact output in case of error (AC 125 V, 2 A)
Alarms Upper/Lower limits for measured value
Out of carrier gas (Option)
No sample (Option)
Out of reagent (Option)
Sample conditions Online measurement: 0.02-0.3 MPa, 30 ml/min or higher
Offline measurement: Normal pressure, 500-1000 ml/3 times
Reagents/Utilities Reagents:
Phosphoric acid solution 20-25 l/month
Sodium persulfate solution 20-25 l/month *2
Carrier gas:
Nitrogen gas, Pressure 0.2-0.7 MPa
Consumption 60-78 Nm3/month
Power AC 100 V ±10 V 50/60 Hz Approx. 500 VA
Set up conditions Indoors
0-40 °C during operation (Temperature gradient 10 °C/hour or less)
45%-85%RH (No condensation)

Specifications are subject to change due to product improvements.
*1 Available as an option.
*2 Used only with TOC-780H.

For Pure Water and Recycled Water Applications TOC-780
Water Quality Analyzers
Space-saving, Low-cost TOC-100
High-function TOC-620
For Pure Water and Recycled Water Applications TOC-780
Automatic TOC Analyzer TOC-106
Total Organic Carbon (TOC) Analyzer for Laboratory TOC-150
Automatic Total Oxygen Demand Analyzer TOD-810C
Automatic UV Analyzer UVT-300
Please use this form to request information or make an inquiry regarding For Pure Water and Recycled Water Applications TOC-780.
To an inquiry form
TOP > Measurement & Control Technologies > Water Quality Analyzers