COD

Due to the chemical properties suitable for various photometers (e.g. Lovibond^®, Hach^®) with 16 mm tube diameter.

Accessories Boiling stones behrotest®

COD acc. to ISO Precision heating blocks with 6, 12 or 24 sample positions. Flat surface heater for even temperature distribution to each sample position. Stainless steel and powder coated steel casing. Extensive insulation provides for inoffensive temperatures of the casing surfaces.
End-to-end grooves in the precision aluminum plate at the bottom of the bores simplify sample handling and provide for exemplary safety of the analyst:

• During sample insertion the grooves cause pressure compensation. Thus even the most accurately fitting reaction vessels slip easily into the bores, which is required to effortlessly handle the behr insert and yoke type frames for RG 2 reaction vessels.
• When inserting the samples into the hot heating block adherent moisture on the vessel surface evaporates in sudden bursts. The grooves drain off the vapor which otherwise might cause the vessels to jump up and down which might eventually lead to the destruction of the vessels.
• In case of one or more vessels overflowing the liquid COD samples discharge through the grooves minimizing the danger of damages inside the block caused by acids.

The HTI 1 manual titration station consists of

• a burette with digital display and
• a magnetic stirrer with a precisely fitting holder for COD reaction vessels. A screen serves as a neutral background and allows the user to determine the colour change at the end of the titration precisely. Therefore a titration could always carried out under similar visual conditions. This improves the precision and the reproducibility of the results.

The precise positioning of the reaction vessels in the holder on the top of the magnetic stirrer also contributes to this. The angled wing of the screen protects against lateral dazzling light.

Specifications
Voltage	230 VAC/ 115 VAC
Frequency	50/60 Hz
Weight	approx. 3.5 kg
Dimensions in mm (W x D x H)	approx. 330 x 200 x 600

These standards are ideal for use as control standards to verify that correct analysis for COD has taken place. Extensive range (10 to 60000 ppm), NIST traceable, 2 years shelf-life. HDPE bottle of 500 ml.

The cooling trough prevents the overheating of the COD samples during the critical addition of sulphuric acid. In addition, it is used to cool the samples after the heating phase.

The continuously adjustable COD series magnetic stirrer with 12 stirring points is used to mix the samples during the metering process. Due to its watertight casing and also its external power supply and control, it is suitable for use under water.

The continuously adjustable COD series magnetic stirrer with 12 stirring points is used to mix the samples during the metering process. Due to its watertight casing and also its external power supply and control, it is suitable for use under water.

Benchtop devices suitable for mobile use. For precise water control through high-precision optics and high-quality interference filters with long-term stable LEDs as light sources.

• Automatic shutdown
• Real time clock and date
• Adjustment function display
• Illuminated LCD-display

Further photometer versions available on request.

Specifications
Measurement cycle:	approx. 3 seconds (method dependent)
Optics:	Temperature compensated LED and photosensor intensifier in a waterproof sample chamber
Keyboard:	4-key polycarbonate film, splashproof
Dimensions (W x D x H):	110 x 190 x 55 mm
Weight:	455 g
Power supply:	4 x AA
IP code:	IP 68

According to ISO 15705. This measuring station from Lovibond^® allows the accurate, rapid, and economical determination of meaningful waste water COD levels (Chemical Oxygen Demand). Easy operation, even by unskilled operators. Comprises of COD photometer, 25 tube tests covering lower measuring ranges, a reactor block for sample digestion and a tube stand. Waterproof acc. to IP 68, 1 hour at 0.1 meter.

Scope of supply: Instrument in carrying case, 4 batteries (AA), adapter for round vials diam. 16 mm, 2 sets of tube tests 0-150 mg/l and 0-1500 mg/l, thermoreactor RD 125, tube stand, 2 syringes, instruction manual.

Specifications: Range:	0 to 15.000 mg/L
Measurement cycle:	approx. 3 seconds (method dependent)
Display:	LCD readout
Optics:	High-quality Interference Filters
Power:	4 batteries (AA) capacity approx. 53 hours or 15000 tests (continuous operation with backlit switched off)
Overall W x D x H:	190 x 110 x 55mm
Storage:	16 data sets
Interface:	internal interface for test data transfer

Accessories COD-Standard Cuvette Test, 16 mm

COD metering funnels, placed on top of the COD reaction vessels, simplify the addition of sulphuric acid to several samples simultaneously.
COD metering funnel together with a cooling trough and a series magnetic stirrer increase the safety and offer considerable relief to the user when determining the COD.

Unit configuration for simultaneous digestion of maximum 6 or 12 COD samples in acc. with ISO, DIN etc.
A digestion unit consists of the following components:

• TRS 300 microprocessor-controlled time and temperature control unit with COD program
• CSB/E Precision heating block for RG 2 reaction vessels
• E/B Insert and yoke type frame for RG 2 reaction vessels
• KW/N Cooling trough with holder and stands for E/B
• RG 2 Reaction vessels
• LK 1 COD air coolers
• LS Air cooler stands for LK COD air coolers

For COD determination. Complete workstations for simultaneous determination of maximum 6 or 12 samples in acc. with ISO, DIN etc. Manual metering and titration.
A workstation consists of the following components

• TRS 300 Microprocessor-controlled time and temperature control unit with COD program
• CSB/E Precision heating block for RG 2 reaction vessels
• E/B Insert and yoke type frame for RG 2 reaction vessels
• KW/N Cooling trough with holder and stands for E/B
• SM 12/N Series magnetic stirrer for E 12/B insert/yoke type frame (only for PB-CSB 12/M)
• RG 2 Reaction vessels
• MRST 2 Magnetic stirrer rod set , 12 rods
• SIST 100 Boiling stones , contents 100 g
• LK1 COD Air coolers
• LS Air cooler stand for LK COD air coolers
• PTFE 29 PTFE Collars for LK 1, set of 12 collars
• TS COD Transport stands for E/B insert/yoke type frame
• HTI 1 Manual titration station

Accessories behrotest ® HTI 1 manual titration station Accessories COD cooling trough Accessories COD magnetic stirrer Accessories COD metering funnel Accessories HCl-absorber Accessories Boiling stones behrotest® Accessories Accessories for determining the COD Accessories TRS 300 programmable temperature and time control unit

To expel chloride, e.g. when determining the COD of sea water.

CR 2200:

• Routine unit for waste water analysis
• Stored programs for all important digestions
• Thermoblock with 12 holes for 16mm o.d. reaction tubes
• Temperatures: 100°C, 120°C, 148°C and 150°C
• 8 fixed heating programmes: 148°C and 2 hours, 148°C and 20 minutes, 120°C and 30 minutes, 120°C and 60 minutes, 150°C and 120 minutes, 120°C and 120 minutes, 100°C and 60 minutes, 30 minutes
• Automatic temperature switch-off after end of set programs

CR 3200:
CR 3200 thermoreactor for thermal digestion with 2x12 round cuvettes with 8 fixed / 8 user-defined programs with temperatures of up to 170°C and AQA

CR 4200:

• Professional unit for waste water analysis
• 2 thermoblocks with 12 holes each for 16mm o.d. reaction tubes,
• 8 fixed heating programs (as CR2200) and 8 user-defined programs (from room temperature (25°C) to 170°C and 0 to 180 minutes)
• High Temperature Capability
• 2 different programs and and temperates can be used simultaneously (CR 4200 only)
• Automatic temperature switch-off after end of set programs
• Optional: External temperature probe TFK CR

Programmable control unit for behrotest^® digester blocks.
behr one-button operation for particularly easy and quick programming. Menu navigation in the language of the country. 10 optionally configurable programs for block temperature and digestion time.
The TRS 300 has a special COD program which has already been set by the plant. Therefore in the operation mode "COD" it heats up to a temperature which is 20°C above the set target temperature. After inserting the samples, the 20°C higher target value remains for another 6 minutes. This procedure ensures heating up to 148°C within 10 minutes which is specified by the ISO norm, and at the same time causes extremely high temperature constancy during the subsequent reaction process. The supplied Windows software permits the user to transfer time/temperatures profiles, which are specifically for the application, via the RS232 interface in both directions between one or more units (TRS 300) and a PC. Temperature data can also be transmitted from the unit to the PC via the RS232 interface while operating. The user can save them if necessary and print them out as graphics. Integrated safety function switches the connected units off if there is a short-circuit and an interruption of the temperature sensor.

Workstation model SMA-ARB

The behrotest^® workstation model SMA-ARB is a basic system for simultaneous aqua regia digestion of either 6 or 12 samples for heavy metals analysis.

System components:

• Precision 6 or 12 sample SMA heating block for round-bottom sample vessels of Ø 41.8 mm, temperature range 20 to 300 °C.
• External ET 2 controller, operating range 20 to 399°C. Time settings from 10 to 120 min. and continuous operation.
• 6 or 12 SR 2 250 ml round-bottom sample vessels with standard taper mouth and PVDF collar.
• 6 or 12 RFK 1 Allihn reflux condensers.
• 6 or 12 AS 1 absorption vessels.
• SG/B stainless steel vessel holding frame for 6 or 12 sample vessels.
• Support scaffold with cooling water distributor and storage holder for 6 or 12 condensers.

Workstation model SMA-ARM

The behrotest^® SMA-ARM workstations are provided with a programmable microprocessor-controlled time/temp. controller as well as a fume manifold for drawing off the acid vapors. This results in greater convenience and functionality in routine laboratory operations.

Alternative COD-Standard Cuvette Test, 16 mm

Flexible wastewater measuring station with mobile photometer MD 610 and thermoreactor RD 125, complete with reagents for COD measurement and the appropriate accessories. With the MD 610, the measurement results of the wastewater can be called up and evaluated on a smartphone or tablet. The RD 125 thermoreactor is equipped with 24 holes for 16 mm cuvettes.

• Data transfer via Bluetooth^® and AquaLX^® app
• Interference filter for increased reproducibility of the results
• Memory for 500 measurement results
• 120 pre-programmed methods

Scope of supply: Photometer MD 610, standard accessories, Thermoreactor RD 125, Cuvette tests: COD (0 ... 150 mg/l, 0 ... 1500 mg/l, ammonium VARIO HR (1 ... 50 mg/l N), nitrate VARIO (1 ... 30 mg/l N), nitrite LR VARIO Powder Pack (0.01 ... 0.3 mg/l N), nitrogen VARIO Total HR (5 ... 150 mg/l N ), phosphate VARIO Total HR (0.02 ... 1 mg/l P / 0.06 ... 3.5 mg/l PO₄), cuvette stand, membrane filtration set, operating instructions, warranty declaration