Photometers
WTW offers ...
... photometers / colorimeters for many applications: from routine analysis with a wide selection of programmed test kits to universal analysis. Photometers and test sets are matching optimally. Test kit programs are stored in the meters.
- photoLab® 6000 Series – Spectrophotometers
- photoLab® – filter photometers
- pHotoFlex® – Portable Photometers
- LabStation – The small lab solution: pHotoFlex® plus LabStation
- Cell Tests without barcodes/li>
- Cases/Sets – The portable lab for field use
- Thermoreactors: Aufschlüsse – Convenient and secure digestions
- Reagents/accessories
- Powder Tests – Portable and powerful – Ideal for field use
The photoLab® 6000 Series Spectral analysis – universal and flexible
Spectrophotometer spectral photometer Spectra Kinetics Analytical Quality Assurance AQA Data management photoLab Lab UV-VIS VIS Barcode support routine analysis intutitive handling portable operation automatic cell recognition. User-defined and complex applications can be programmed comfortably.
More than 200 programs for routine analysis with test kits as well as special programs such as NH3, CO2, colour, Chlorophyll, SAC . Additionally a brewery application package is available.
photoLab® 6000 Series
- 190 – 1100 nm
- Innovative optics
- Intuitive interface
- Extensive AQA
- Automatic cell recognition
- Barcode-recognition for all cell sizes
Thanks to state-of-the-art technology all photoLab® 6000 models are complete with optimized operation – fast, direct and intuitive:
- Menu navigation for all applications for concise operation
- Large, backlit graphic display, for simple graphical evaluation
- Direct access to functions such as menu related settings, dilution, quotation mode using function keys
- Selection tables for convenient selection and search of data, parameters, methods etc.
- Data filter for selective choice of measuring data sets
- Masks for easy handling and measuring of user defined methods
- USB for all data transfers
| Model | photoLab® 6100 (VIS) | photoLab® 6600 (UV/VIS) |
| Wavelength range | 320 - 1100 nm | 190 - 1100 nm |
| Technique | Single Beam with AutoCheck (time-shifted reference) | Single Beam with AutoCheck (time-shifted reference) |
| Lamp | Tungsten | Xenon Flashlamp |
| Wavelength resolution / accuracy |
1nm; ± 1nm | 1nm; ± 1nm |
| Scan speed | Approx. 334 nm/min resp. 5.6 nm/sec | Approx. 455 nm/min resp. 7.6 nm/sec |
| Band width | 4 nm | 4 nm |
Analytical Quality Assurance (AQA) – From self monitoring to large laboratory environment
- Extensive equipment testing
- MatrixCheck
- Extended user administration
The instrument supported Analytical Quality Assurance has become a must across all industries to guarantee plausible and correct measuring results. The photoLab® 6000 series supports the AQA for checking the instrument and for individual routine measurements. The administration of user groups for large laboratory environments including administrative, user and guest profiles is also supported. The AQA feature can be switched on or off.
Calibration intervals for instrument and test kits
- PhotoCheck: Instrument check including linearity at 3 wavelengths and 4 measuring points
- Grey filter and UV-VIS test standards
- Standards for single parameters and combined checks
- Matrix check with spiking
Data management with USB
- Measurement data, spectra, and kinetics
- Software and method updates
photoLab® 6000 series is equipped with three interfaces: USB-A to connect printer, barcode reader and USB stick, USB-B for PC-connection and an RS 232 interface. Thus, the data exchange via USB is extremely convenient.
photoLab® 6000 series en-route – convenient portable operation
A spectrophotometer is typically used in the laboratory, although it is convenient when it can also be operated on-site. For on-site use, it is important to have safe transport, a sheltered area and a corresponding measuring preparation with warm up period and zeroing after transport. The light-weight and easy-to-operate photoLab® 6000 series is flexible when on-site operation is required. A sturdy carrying case, and a 12 V adapter cable for connection to a typical car battery are available options.
IQ-LabLink
Automatic Matrix Adjustment for IQ SENSOR NET
The advantages at a glance
- Convenient and menu-driven matrix adjustment
- Safe and fast data transfer via USB
- Automatic allocation to several sensors
The photoLab® 6000 Serie offers – together with the IQ Sensor N et – a system aided procedure for matrix adjustment of the ISE sonsors: The data of the sensors are transfered via USB from the MIQ/TC 2020 XT to the photometer via “job list”.
The required parameters are measured with a convenient and automated measuring procedure and transferred via USB back to the controler. The matrix adjustment of all respective sensors is reliable and without mistaken identity.
more information about IQ-LabLink ...
Just measure!
Automatic cell recognition for all cell types sizes
Whatever cell is used, 10, 20 or 50 mm cuvettes will be recognized by photoLab® automatically and the correct measurement range for all programmed reagent test kits will be offered. Using single use plastic cuvettes, make sure that the instrument can recognize the cuvettes (e.g. opaque side panels). For standard use with 10 mm cuvettes WTW offers suitable PMMA cuvettes.
Automatic test recognition via barcode for round and rectangular cuvette tests
Unique for the routine analytic is the possibility to measure in addition to rapid tests in round cuvettes also the high-quality and extremely low-cost reagent test kits with barcodes. All necessary setting from wave-length to concentration range, citation, AQS-control data are conducted via barcode: combined with the automatic cuvettes applies: Just measure!
Automatic activation of measuring
After sticking the cuvette the measure starts automatically thanks to the automatic cuvette- and test recognition with method request via barcode
Automatic Quality Assurance (AQA/IQA):
photoLab® provides comprehensive support to safe the data in the context of the analytic quality assurance respectively intern quality assurance(IQA). Analytical Quality assurance (AQA) - From self-control to large laboratories
Data management made easy:
For all photometers are PC-software packages available to export the data from the photometer to the PC/LIMS-area, to edit or create own methods and to compare several photometers
The photoLab® Series – Immediate and high precision measuring
Filter photometers photoLab®: Open the lid, insert the cuvette, read the measuring value instantly! The photoLab® filter photometers offer laboratory precision, convenience and rapid results for routine operation.
photoLab® Series
- AQA/IQC, multistage
- Automatic cuvette identification
- Barcode recognition for all cuvette types
Speed and accuracy results from the filter technology used with reference beam technique. Combined with barcoded round and rectangular cuvette tests, efficient and cost-effective measurements are possible. Defined wavelengths by high-precision filters do not require any mechanics and therefore make this measuring instrument practically maintenance free.
- Auto Check for highest stability and precision
- Automatic cell recognition for all used cuvette types
- Automatic test recognition via barcode for round
- and rectangular cuvette tests
- Automatic measuring start
- Automatic Quality Assurance (AQA)
- Wide range of programmed test kits: from convenient cell test to economical reagent test kits
photoLab® S6
The filter photometer with 6 wavelengths for all common routine determinations with cell tests (round) for wastewater and drinking water analysis. The instrument is simple and easy, ideal for:
- Sporadic, single measurements
- Using cell tests for fast measuring results
- Standard measurements with easy storage
photoLab® S12
Filter photometer with 12 wavelengths for extensive routine operations in service laboratories and for education.
In addition to the barcoded cell tests, there are a considerable number of economic reagent test kits available for rectangular cuvettes. Uniquely, the barcode support also comes with test kits for 10 mm, 20 mm and 50 mm rectangular cuvettes. Even trace concentrations are covered – especially important for drinking water analysis. Additionally, 50 user defined methods are possible and measurements of kinetics can be performed.
The instrument is highly efficient and cost-effective for:
- Routine determinations with a large number of samples
- Measuring the smallest concentrations
- Special tasks with user-defined methods
These features are also suitable for service laboratories.
| Model | photoLab® S6 and S6-A | photoLab® S12 and S12-A |
| Photodiode array for | 6 wavelengths | 12 wavelengths |
| Wavelengths, nm | 340, 445, 525, 550, 605, 690 | 340, 410, 445, 500, 525, 550, 565, 605, 620, 665, 690,820 |
Just measure!
Automatic cell recognition for all cell types sizes
Whatever cell is used, 10, 20 or 50 mm cuvettes will be recognized by photoLab® automatically and the correct measurement range for all programmed reagent test kits will be offered. Using single use plastic cuvettes, make sure that the instrument can recognize the cuvettes (e.g. opaque side panels). For standard use with 10 mm cuvettes WTW offers suitable PMMA cuvettes.
Automatic test recognition via barcode for round and rectangular cuvette tests
Unique for the routine analytic is the possibility to measure in addition to rapid tests in round cuvettes also the high-quality and extremely low-cost reagent test kits with barcodes. All necessary setting from wave-length to concentration range, citation, AQS-control data are conducted via barcode: combined with the automatic cuvettes applies: Just measure!
Automatic activation of measuring
After sticking the cuvette the measure starts automatically thanks to the automatic cuvette- and test recognition with method request via barcode
Automatic Quality Assurance (AQA/IQA):
photoLab® provides comprehensive support to safe the data in the context of the analytic quality assurance respectively intern quality assurance(IQA). Analytical Quality assurance (AQA) - From self-control to large laboratories
Data management made easy:
For all photometers are PC-software packages available to export the data from the photometer to the PC/LIMS-area, to edit or create own methods and to compare several photometers
pHotoFlex®: The Portable Colorimeters
The portable colorimters of pHotoFlex® series offer the unique combination ofphotometry, pH and turbidity measurement. This is most beneficial for routine tasks in water analysis: precision with low power consumption achieved through optical filters together with the LEDs for 6 wavelengths. Additionally, the pH measuring and the optional turbidity measuring (IR range) are integrated for pHotoFlex® pH and pHotoFlex® Turb, making these instruments the perfect partners for all measurements in the field: in a wastewater plant for wastewater and reference measurements, in drinking water analysis at a wellhead or in a cistern, and for monitoring bodies of water. They are versatile, low current and offer many extra features.
The pHotoFlex® Series at a glance
| pHotoFlex® | STD | pH | TURB |
| pH Measurement | no | yes | yes |
| Turbidity Measurement | no | no | yes |
| Calibration interval/record | no | yes | yes |
| Calibration adjustment for selected programs | yes | yes | no |
| User-defined program via LSdata Software | 50 | 100 | 100 |
| Data storage (with identification number) | 100 | 1000 | 1000 |
| Sets | no | yes | yes |
| Special methods with pH and temperature | no | yes | yes |
| Programs / special methods NH3, CO2 | ca. 200/no | ca. 200/yes | ca. 200/yes |
| Cells / Cuvettes | round cuvettes 16 mm (height 91–104 mm) and 28 mm | round cuvettes 16 mm (height 91–104 mm) and 28 mm | round cuvettes 16 mm (height 91–104 mm) and 28 mm |
| Waterproof housing (IP67) | yes | yes | yes |
| Interface | RS232 | RS232 | RS232 |
| LabStation | yes | yes | yes |
| Rechargeable batteries + universal plug | no | optional | optional |
pHotoFlex® STD – Portable Photometer for Water Analysis and Routine Measurement
- Intuitive and easy
- More than 160 Methoden
- 50 user-defined methods
- Storage of 100 data sets
Measuring ranges/Resolution pHotoFlex® STD
| Light source | LED | |
| Wavelengths nm | 436, 517, 557, 594, 610, 690 | |
| User-defined methods | 50 | |
| Methods/software update | Via Internet | |
| Data storage | 100 data sets | |
| Accuracy | Photometry | <2 nm wavelength accuracy, 0.005 abs. reproducibility |
pHotoFlex® pH – Portable Photometer with pH
- like pHotoFlex® STD, additionally:
- Integrated pH measurement
- Automatic temperature compensation
- NH3 and CO2
The portable photometer pHotoFlex® pH demonstrates its capability with complex tasks in environmental and process monitoring at a variety of sites.
The integrated pH function allows measurements of pH 0 ... 16 with automatic buffer recognition (TEC/NIST). Temperature compensation is automatic within the permitted range of – 5 ... 100 °C (23 … 212 °F). WTW‘s MultiCal®-routine allows the automatic calibration with up to 3 calibration points. WTW offers a large selection of pH sensors as optional accessories: For field use, the maintenance-free SenTix® 41 is recommended, whereas for precision measurements in the laboratory, the SenTix® 81 glass electrodecould be used. The electrodes are described in detail in the pH measuring chapter.
| Light source | LED | |
| Wavelengths nm | 436, 517, 557, 594, 610, 690 | |
| User-defined methods | 100 | |
| Methods/software update | via Internet | |
| Data storage | 1000 data sets | |
| pH | 0-16 | |
| Accuracy | Photometry pH |
<2 nm wavelength accuracy, 0.005 abs. reproducibility ±0.01 pH |
pHotoFlex® Turb – The real "Multiparameter" Colorimeter
- like pHotoFlex®, additionally:
- Turbidity measurement according to DIN 27027/ ISO 7027
- 0-1100 NTU/FNU
- Calibration kit (0.02-10-1000 NTU)
The pHotoFlex® Turb is analogous to the pHotoFlex® pH, but includes an infrared (IR) light source for nephelometric turbidity measurement (90°), according to the requirements of DIN 27027/ISO 7027. Its precision is comparable to laboratory instruments for turbiditymeasurement. Together with the AMCO Clear® standards highest precision for the sensitive testing of drinking water is given.
The calibration with the supplied AMCO Clear® standards and measured data can be documented and output via RS232.
| Light source | LED | |
| Wavelengths nm | 436, 517, 557, 594, 610, 690 + 860 | |
| User-defined methods | 100 | |
| Methods/software update | via Internet | |
| Data storage | 1000 data sets | |
| pH | 0-16 | |
| Turbidity | 0-1100 NTU/FNU | |
| Accuracy | Photometry pH / Turbidity |
< 2 nm wavelength accuracy, 0.005 abs. reproducibility ±0.01 pH 0.01 NTU/FNU or ±2% of the measured value |
The portable Lab – pHotoFlex® Colorimeters in field sets
Safe “Outdoor” Handling
- Lab Tray – a small removable table with cavities
- Tidy up: Pipettes, vials, accessories….
- Waterproof short instruction including program list
- Storage with Identification (ID) number,e.g. for location
- Convenient data management
Monitoring for environmental protection
These mobile colorimeter labs are ideally suited for easy measurement of many parameters on-site, whether for monitoring purposes according to WFD or event-related measurements e.g. after flooding.
pHotoFlex® Field Sets at a glance
| Portable Colorimeter with 6 wavelength |
STD | pH | TURB |
| pH Measurement (±0.01 pH, ATC) / Redox |
no | yes | yes |
| Turbidity Measurement IR acc. DIN /ISO |
no | no | yes |
| Special programs for NH3, CO2, pH and temp dependent |
no | no | yes |
| pH electrode SenTix® 41 with stand |
no | yes | yes |
| Technical Buffers pH 7.00 and 4.01 |
no | yes | yes |
| KCl 50 ml | no | yes | yes |
| Pipetting | 2x2 ml + 10 ml scaled syringes |
0.500 – 5.000 ml variable piston pipette |
0.500 – 5.000 ml variable piston pipette |
| Calibration Standards Turbidity 0.02-10-1000 NTU AMCO Clear® |
no | no | yes |
| Waterproof Housing | IP 67 | IP 67 | IP 67 |
| Certificates | CE/ETLus/cETL | CE/ETLus/cETL | CE/ETLus/cETL |
Integrated lab table supporting outdoor use: Work bench with cavities for stable stand of vials, electrode, beakers etc.*
Accessories: Zero Cell 16 mm, waterproof short instruction including programmed test kits, cleaning tissues, LSdata PC software for convenient and GLP data handling, PC connecting cable AK 540/B, screw driver, beaker 50 ml, 5 vials 28 mm, 4 batteries (AA), documentation*
AQA: pHotoFlex® Check, Calibration interval setting und records (pH, turbidity)*
* for pHotoFlex STD, pH, TURB
A strong team: pHotoFlex® & small sized Powder Pillow Test Kit
These small reagent portions in sachets can be dosed directly into the sapmle, which minimizes pipetting: ideal for field monitoring and for special situations such as flooding. In total there are 150 methods for all parameters from A to Z available:
LabStation
The LabStation – holding the instrument – upgrades the portable pHotoFlex® andTurb® 430 models to a small laboratory solution. The LabStation also serves as charging station for the included rechargeable battery set.
Thermoreactors for COD and all other thermal digestion processes
- Programs for routine tests
- Rapid digestion for COD
- Quality assurance with testing sensor (optional)
Thermoreactors are required for the determination of COD, total nitrogen or total phosphorus. In each of the WTW thermoreactors, the most important temperatures and digestion times are stored. They ensure complete digestion of the sample, as they maintain the necessary high reaction temperature throughout the defined period. For sample digestion three crack sets are available: crack set 10 (model 14687, 100 digestions) and crack set 10-C (model 14688, 25 cuvettes) for heavy metal, as well as crack set 20 for total nitrogen (model 14963, 90 determinations).
There are 8, easily selectable digestion programs available. In addition to these 8 fixed standard programs, CR 3200 and CR 4200 thermoreactors allow you to store 8 of your own user-defined programs. Suitable for 16 mm cuvettes.
CR 2200
Ideal for performing routine water analysis tests with small sample amounts, as 8 programs are available for digestion of 12 sample cuvettes at 100, 120, 148 and 150 °C (212, 248 and 298.4 °F).
CR 3200
In addition, you can program the CR 3200 to carry out 8 of your individual digestions at freely selectable temperatures up to 170 °C (338 °F).
CR 4200
The right choice for performing multiple tests simultaneously, such as COD (148 °C/298.4 °F) and total-N (120 °C/248 °F), as the two thermoblocks for 12 cuvettes can each be controlled separately. It also has memory for 8 of your own user-defined programs with free temperature selection up to 170 °C (338 °F).
| Model | CR 2200 | CR 3200 | CR 4200 |
| Number of samples, max. | 1 x12 | 2 x 12 same programe | 2 x 12, different programs |
| 8 pre-stored programs | 100 °C 30 min, 60 min 120 °C mit 30 min, 60 min, 120 min, 148 °C 120 min, 20 min, 150 °C 120 min |
100 °C 30 min, 60 min 120 °C mit 30 min, 60 min, 120 min, 148 °C 120 min, 20 min, 150 °C 120 min |
100 °C 30 min, 60 min 120 °C mit 30 min, 60 min, 120 min, 148 °C 120 min, 20 min, 150 °C 120 min |
| User programs | — | 8 freely selectable 25–170°C | 8 freely selectable 25–170°C |
Temperature Probe TFK CR
Quality Assurance:
Quality assurance is constantly increasing in importance, even in the operational analysis sector. The CR 3200 and CR 4200 thermoreactors are both equipped with the external temperature probe TFK CR (Order No. 250 100) as a testing aid. This temperature probe can be plugged into the interface in place of a cuvette, and the set and actual temperatures can be outputted either to a printer or a PC.
This means that the function can not only be monitored, but also documented.
Fast Digestion for CSB
New programs for COD
For COD digestion, programs according to various international standard methods are available. On demand of many customers, a rapid digestion for 20 minutes at 148 °C (298.4 °F) is provided, as this timespan has proven to be sufficient for many applications.
All reactors have timer functions. All reactors display when the reaction temperature is reached.
Safety precautions
Along with superior safety, all WTW thermoreactors optimize the heat transmission between the heating block and cuvettes. The safety hood prevents chemicals from splashing in the event of a broken cuvette, a covering provides protection from contact with the heating block surface.
Reagents from A – Z The Right Test for Every Application
- Convenient and cost effective
- Precise
- Assured quality by AQA/IQC
For routine analysis, a wide choice of tests is available. Benefitial: Economic lot certificated and barcoded options with automatic recognition for all cuvette sizes. Depending on the optical system and the wavelength employed, photometer and test kit make up a matched system with different specific advantages.
For use with portable colorimeters, test sets need to be straightforward. The low consumption LED optics allows the use of easy-to-use and cost-effective test sets, e.g. powder tests. In the laboratory, instruments with barcode and utmost optical sensitivity suggest the use of high-precision tests with barcode reader, certificate and quality assurance support.
WTW continues to expand the reagent offering. Not only are new tests developed, but the compatability of tests with different instruments is continuously being developed. Due to the different photometer optics, one test may yield different measuring ranges in different instruments; LED photometers may have smaller measuring ranges for the same test.
Taking measurements correctly
In reviewing lot certificates, one recognizes the most important factor: Choosing the matching measuring range is critical. Every concentration determination is accurate only within the linear absorption range.
At the limits of the measuring range, the given tolerance has the biggest impact on the results. Therefore, it may be worth repeating the measurement using a test set with a better suited measuring range.
