DS-7 and Ds-7+ instruments rapidly quantifies nucleic acids and protein samples with microvolumes samples or cuvettes. Possibility to use standard quartz or disposable cuvettes for up to 10 mm pathlength absorbance measurements (190-840 nm) on DS-7+ model. This system includes a cuvette block heater for kinetics studies from 37-45°C. Based on the award-winning technology of DS-11 series, DS-7 and DS-7+ spectrophotometers offer high quality quantification, full UV-Vis quantification.
Total measurement confidence
The patented* DS-7 combines unique hardware and software features to deliver unmatched confidence in sample accuracy, performance and reliability.
- SmartPath® Technology – real time, precise pathlength control delivered every time
- Exceptional for proteins – BridgeTesting® eliminates broken sample columns common on other platforms
- Calibration and maintenance free. No measurement drift, no service down-time. Accurate results every time.
* Patent US9442009
Easy to learn. Fast to use.
DS Series instruments feature the most powerful and intuitive software of its type. Designed by life scientists, pre-installed EasyApps® and a breakthrough Android™ touchscreen interface delivers error-free operation and sample to data in under 4 seconds. Every instrument is ready to measure right out of the box – no PC set-up or software installation.
Microvolume mode
SmartPath® Technology
SmartPath Technology is at the heart of all microvolume measurements on the DS Series. The proprietary algorithms provide ultra-precise by using real-time absorbance feed assessment to determine the optimum pathlength with which to measure the sample. On the DS-7 this enables a lower detection limit (2.0 ng/ul dsDNA or 0.1 mg/ml BSA) and the highest max detection (15,000 ng/ul of dsDNA or 450 mg/ml of BSA protein).
BridgeTesting®
A major concern for microvolume spectrophotometers, especially those that use a 1 mm pathlength, is sample column breakage. When this occurs, the upper and lower measurement pedestals are not bridged with sample and the measurement will be erroneous by as much as 1,000% (not a typo). The DS Series is inherently less susceptible to this since the max pathlength is 0.5 mm and the sample is continually compressed during measurements rather than stretched. In addition, DeNovix has developed a proprietary algorithm that detects in real-time if the sample column has broken and then compensates to ensure accurate results are achieved with no user action being required. No other microvolume spectrophotometer has this capability and this method is especially beneficial for quantification of low surface tension fluids such as protein samples. You can learn more about BridgeTesting technology in this TechNote.
Always calibrated
Since the DS-7 Series does not rely on fixed path length calibrations and therefore does not require regular calibration checks. There is no downtime or expense required for routine calibration like many other spectrophotometers. DeNovix offers a LC-NA verification standard for labs that may need to verify proper operation from time to time in accordance with their own quality standards.
Truly 1.0 ul sample volumes
A key feature of the DS-7 is that the longest path length used (0.5 mm path) is shorter than the 1.0 mm path used by other microvolume spectrophotometers. This enables the DS-7 to truly measure 1.0 ul samples, virtually eliminating the possibility of erroneous results due to sample column breakage.
Cuvette mode
DS-7+ cuvette mode
Enables up to 10 mm pathlength measurements using standard quartz or disposable cuvettes extending the UV-Vis lower detectible limit. The built-in cuvette heater controls temperatures for Kinetics studies. These added features provide a full range of UV-Vis absorbance quantitation in a single instrument.
Extended range
Using the 1 cm cuvette mode enables a lower detection limit 20 times below what is available on the microvolume mode of the DS-7 without the use of fluorescent dyes to gain sensitivity. Measure samples with concentrations as low as 0.04 ng/ul of purified dsDNA or 0.002 mg/ml purified BSA in cuvette mode.
Kinetics
Create simple kinetics methods measuring two absorbance wavelengths over a user-defined measurement frequency and period. EasyApps® streamlines the process to create and save custom methods and enables cuvette temperature control between 37°C to 45°C.
Cell culture OD 600
The high-particulate nature of bacterial cell cultures benefit from a longer measurement pathlength. The particulates in these samples scatter light, and a 10 mm pathlength provides a longer cross-section of the sample for the spectrophotometer’s light beam to travel through. This ensures the highest degree of accuracy and reproducibility when measuring these types of samples.
Connect to your results
Built-in Wi-Fi, Ethernet and USB allows easy export of data you want in the format you need. Email a .csv or color .jpg of your results, save data to LIMS or network drives, print results or graphs to network and label printers and more !
Color choices
The DS-7 and DS-7+ are available in four color choices:
