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The VELP NDA 701 and 702 Dumas Nitrogen Analysers are versatile elemental analysers for Nitrogen and Protein determination according to the Dumas combustion method. Although both are cloud-enabled, the NDA 702 also allows the possibility to choose between Helium and Argon as a carrier gas.
Powered by the DUMASoft software, both analysers produce N/Protein results in just 3 to 4 minutes without needing to be supervised. Faster, easier, and safer than a traditional Kjeldahl system, these VELP Dumas Nitrogen Analysers do not require aggressive chemicals, making them the best solution for high throughput labs looking for a safe and fast analyser.
Both analysers are designed to work 24/7, 365 days a year with a minimal and easy maintenance routine. Although supplied with a disc of 30 positions, both the NDA 701 and 702 can be expanded to accommodate up to 117 samples.
The 701 & 702 analyse samples of up to 1 g and overall lowers operating costs thanks to VELP engineering and genuine consumables with extended lifetime.
Very easy to install, both analysers are very compact, meaning that you save valuable lab bench space.
NDA 701
The low LOD limit of detection of 0.003 mgN and the RSD lower than 0.5% (EDTA) possible with the NDA 701 Dumas Nitrogen analyser assures you high precision results and excellent reproducibility.
NDA 702
The lowest LOD in the market of 0.001 mgN with Helium and the RSD lower than 0.5% (EDTA) possible with the NDA 702 Dumas Nitrogen analyser assures you high precision results and excellent reproducibility.
The NDA 702 also allows cost reduction related to Helium availability thanks to the seamless choice of Argon.
Protein determination:
Nitrogen determination:
| NDA701 | NDA702 | |
| METHOD OF ANALYSIS | Dumas method / Combustion | Dumas method / Combustion |
| DETECTOR | Autocalibrating TCD (no need for a reference gas) | Autocalibrating TCD (no need for a reference gas) |
| CARRIER GAS | Helium | Helium or Argon |
| SAMPLE WEIGHT | Up to 1 g | Up to 1 g |
| MEASURING RANGE | ppm – 200 mgN | ppm – 200 mgN |
| ANALISIS TIME | 3-5 min | 3-5 min |
| AUTOSAMPLER CAPACITY | Up to 4 discs, 30 positions each | Up to 4 discs, 30 positions each |
| AUTOSAMPLER TYPE | Pneumatic | Pneumatic |
| REPRODUCIBILITY (RSD) | < 0.5% for EDTA standards approx. 100 mg (9.57% N) | < 0.5% for EDTA standards approx. 100 mg (9.57% N) |
| RECOVERY | > 99.5% | > 99.5% |
| DETECTION LIMIT | 0.003 mg N (He) | 0.001 mg N (He) or 0.01 mg N (Ar) |
| COMBUSTION TEMPERATURE | 1030 °C / 1886 °F | 1030 °C / 1886 °F |
| HELIUM (He) / ARGON (Ar) | Purity 99.999% (grade 5.0) | Purity 99.999% (grade 5.0) |
| OXYGEN (O₂) | Purity 99.999% (grade 5.0) | Purity 99.999% (grade 5.0) |
| CARRIER GAS PRESSURE | 2 bar | 2 bar |
| OXYGEN (O₂) PRESSURE | 2 bar | 2 bar |
| CONNECTIVITY | Cloud via LAN or Wi-Fi | Cloud via LAN or Wi-Fi |
| INTERFACES | USB, RS232, VELP Ermes Cloud Platform | USB, RS232, VELP Ermes Cloud Platform |
| POWER | 1400 W | 1400 W |
| POWER SUPPLY | 230 V / 50 – 60 Hz | 230 V / 50 – 60 Hz |
| WEIGHT | 54 kg / 119 lb | 54 kg / 119 lb |
| DIMENSIONS (WxHxD)
(including autosampler) |
655 x 690 x 410 mm / 25.8 x 27.2 x 16.1 in | 655 x 690 x 410 mm / 25.8 x 27.2 x 16.1 in |
Consultation – Do you need further information?
Then please contact us by e-mail or telephone!
