TOC-810 On-line TOC Analyzer
continuous TOC analysis with high temperature oxidation method

Typical Applications

• Pure water monitoring (e.g. boiler feed water, condensate)
• Production facility monitoring
• Drinking water monitoring
• Mixed drainage water monitoring
• Influent and effluent wastewater treatment monitoring
• Airport de-icing water treatment monitoring

Key Features

• Continuous real time analysis
• Continuous fast sample conditioning
• Quick response to changes in TOC level
• High temperature oxidation
• Extraordinarily stable measuring characteristics
• Reliable system calibration
• Highest operational reliability
• Intelligent self-monitoring
• Designed from the ground up for process analysis

The TOC-810 represents the newest generation of LFE's on-line TOC-analyzers. These have proven themselves with considerable success in use at many chemical plants as well as other important industrial companies since the beginning of the '80s.

The LFE TOC-810 has evolved out of real-world applications as an on-line analyzer for the continuous TOC registration of highly- as well as low contaminated water. The demands placed on every component of such an on-line TOC-analyzer require special design solutions.

• Acidifier/ Sparger/ Multiplexer-unit
  (ASM-unit; wall mounted)
  The basic TOC-810 instrument functions as a TC-analyzer. The ASM-unit facilitates the removal of inorganically bound carbon (TIC).
  This unit can be equipped with further options:
  - automatic calibration for 3 test solutions
  - Multiplex capability (3 sample streams)
  - Sample dilution stage

• Simultaneous, selective VOC- or TIC- analysis
  in conjunction with 2^nd NDIR measuring channel and the Acidifier/ Sparger/ Multiplexer-unit
• Analog expansion module
  expands the system from 2 up to 6 configurable 0(4)-20 mA analog outputs
• Digital expansion module
  8 digital inputs plus expansion of system from 3 up to 10 digital outputs
• RS-232 serial interface
• Built-in paperless recorder

Aside from the intentional removal of inorganically bound carbon (TIC) the sparger air can also inadvertently expel volatile organic carbon (VOC) compounds which escape detection.

The TOC-810 can be fitted with an optional package in conjunction with a 2^nd photometer channel which simultaneously and continuously measures the VOC-level independent of the TOC- (or DOC-) analysis.

The potentially VOC-enriched sparger air is split into two parallel gas streams each containing the CO₂ background level representative of the TIC level of the water sample as well as possible VOC.

• The 1^st gas stream is passed unaltered through the reference cell of the differential CO₂ photometer channel.
• The 2^nd gas stream is passed through a catalytic converter stage in which any VOC is oxidized to CO₂ and added to the background CO₂ level. This stream is sent to the sample side of the differential CO₂ photometer.

The difference in IR radiation absorption in the photometer channel corresponds to the VOC concentration of the water sample.

The inherent response of a differential NDIR photometer to varying background levels is dynamically corrected for by the implementation of LFE's patented gain stabilization / common mode rejection algorithm.

First introduced by LFE in 1989, this unique method totally eliminates the need for a CO₂ scrubber. The resultant maintenance requirements for the VOC analysis are minimal.