Equipment configuration for simultaneous digestion of up to 6 or 12 COD samples according to DIN/DEV, EN and ISO.
A digestion system consists of the following components:
Microprocessor-controlled time and temperature controller TRS 300 with COD program.
Precision block heater COD/E for RG 2 reaction vessels.
Sample rack / rack attachment E/B for RG 2 reaction vessels.
Cooling bath KW/N with mounting and rack for E/B.
RG 2 Reaction vessels.
LK 1 COD air cooler.
LS Air cooler stand for COD LK air coolers.
COD digestion units:
PA-CSB | BEHR
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Complete workstations for simultaneous determination of a maximum of 6 or 12 samples in accordance with DIN/DEV, EN and ISO. Manual dispensing and titration.
A workstation comprises:
Microprocessor-controlled time and TRS 300 temperature controller with COD program
Precision block heater COD/E for RG 2 reaction vessels
Sample rack insert / rack attachment E/B for RG 2 reaction vessels
KW/N cooling trough with holder and stand for E/B
SM 12/N serial magnetic agitator for sample rack insert / rack attachment E 12/B (PB-CSB 12/M only)
RG 2 reaction vessels
MRST 2 magnetic agitator bar set, pack of 12
SIST 100 boiling stones, package content 100 g
LK 1 COD air cooler
LS Air cooler stand for COD LK air coolers
PTFE sleeves PTFE 29 for LK 1, set of 12
TS COD vessel holding frame for E/B sample rack / rack attachment
HTI 1 manual titration station
COD workstations:
Programmable controller for behrotest® digestion blocks behr single-button operation for particularly fast and easy programming. Menu navigation in local language. 10 freely configurable programs for block temperature and digestion time.
The TRS 300 features a special factory-set COD program. In "COD" mode, it heats to a temperature 20°C above the specified setpoint temperature. After sample insertion, the setpoint temperate increased by 20°C is retained for another 6 minutes This procedure ensures compliance with the ISO specification of heating to 148°C within 10 minutes and outstanding temperature stability during the subsequent reaction process. The included Windows software provides the user with the option of bidirectional transmit of application-specific time and temperature profiles between one or several devices (TRS 300) and a PC. Via the RS232 interface, temperature data can be transmitted from the device to the PC during system operation. If required, the data may be saved and printed out in form of a diagram.
The built-in safety features shut down the connected devices in case of short circuit and temperature sensor failure.
TRS 300 | BEHR
COD titration in accordance with your requirements: Manual or automatic – Reliability and precision with behrotest ® devices
The HTI 1 manual titration station consists of
A burette with digital display and
A magnetic agitator with a precisely fitting holder for COD reaction vessels.
A screen serves as a neutral background and enables the user to precisely determine the colour change at the end of titration. This feature ensures titrations are always carried out under similar visual conditions. This way, results are more accurate and reproducible. The precise positioning of the reaction vessel in the holder on top of the magnetic agitator also contributes to this. In addition, the laterally arranged screen panels serve as a shield from incident light from the side. COD in accordance with ISO, EN and DIN. The burette interface is used to transmit data to a PC where they can be further processed by the behr COD software.
HTI 1 | BEHR
Dispensing unit for automated, rapid dispensing of potassium dichromate solution and sulphuric acid for COD sample preparation. Simultaneous dispensing into a maximum of 12 samples Integrated magnetic series agitator with 12 sample positions.
Time-optimised intermittent dispensing: Sulphuric acid is dispensed in several cycles, with samples being constantly cooled and stirred. This method accelerates sample preparation and prevents a non-standard overheating of samples during the dispensing process.
Operator safety: Thanks to the automated reagent dispensing process, the operator is not exposed the chemical substances at any time.
Practice-oriented and user-friendly software: Programming of the behr DS 20 is simple and user-friendly thanks to the Windows user interface.
DS 20 | BEHR
Dispension:
Time-optimised intermittent COD dispensing. Sulphuric acid is dispensed in several cycles, with samples being constantly cooled and stirred. This method accelerates sample preparation and prevents a non-standard overheating of the samples during the dispensing process. Titration.
Freely programmable "methods", such as end point titrations, equivalence point titrations, linear, dynamic and quasi-dynamic titrations. Different password-protected user levels. Graphic printout with 1st and 2nd derivative. Freely selectable printout of sample data. The "methods" functionality ensures compliance with all national COD standards. Instead of the customary over-titration, the behr-specific dynamic titration guarantees a precise end-point identification even in the presence of a typical COD slope steepness, thus obtaining particularly accurate measurement results
Practice-oriented and user-friendly software: Programming of the behr DT 20 is simple and user-friendly thanks to the Windows user interface.
DT 20 | BEHR
Special application-oriented behrotest® equipment for COD determination
COD dispensing hopper for top-mounting on COD reaction vessels facilitates simultaneous dispensing of sulphuric acid into several samples. The user fills the dispensing hopper with a standard volume of 30 ml. This can be handled far quicker than direct dispensing into the sample. Via a spindle stopcock, sulphuric acid is added to the sample drop by drop. After initial adjustment, the user can swiftly dispense sulphuric acid into a multitude of samples without time-consuming procedures.
COD dispensing hopper with cooling trough and magnetic series agitator provide for increased safety in COD determination and a significant reduction of workload.
COD dispensing hopper | BEHR
For driving off chlorine in case chloride contents are in excess of 1000 mg and COD ranges above 50 mg.
In excess of 300 mg for the 5-50 mg COD range Prior to insertion into the reaction vessel, either fill the filter cartridge with absorbent material (calcium hydroxide) or soak it with distilled water. The solution is either stirred for several hours on the standalone magnetic agitator or on the magnetic series agitator with 12 positions, then to be driven off as Cl.
HCl absorber | BEHR
Vessel holding frame for safe handling of RG 2 reaction vessels in EG sample rack inserts/rack attachments.
Vessel holding frame | BEHR
behrotest® boiling stones are made from ceramic material. The advantage over conventional boiling stones made of glass is that they provide optimum protection against boiling delay due to their porosity and shape, even with badly blended samples. behrotest® boiling stones are chemically pure and guarantee unbiased results in COD analysis.
HCl 29 | BEHR
