Dozatoare de pulbere

Dozatoare de pulbere

Singura pompa programabila pentru dozarea automata, continua a substantelor cristaline sau sub forma de pudra.

Compus dintr-o unitate de dozare cuplata la un motor ce permite dozarea reproductibila si constanta chiar si a unor solide sub forma de granule greu curgatoare.

Nemaiutilizand spatula, riscul contaminarii utilizatorului cu substante toxice este eliminat.

Este usor de asamblat/dezasamblat si curatat.

De asemenea substantele dozate nu mai sunt afectate de vaporii de apa, oxigen, etc.

Datorita bunei reproductibilitati si eliminarii erorilor, se reduce numarul de experimente.

Dozatorul poate fi conectat la INTEGRATORUL LAMBDA, care permite cuantificarea sumei de pulbere adăugată ca o funcţie de timp. Acest lucru oferă informaţii importante privind procesele sau reacţiile, de exemplu, atunci când dozatorul este controlat de un controler (pH-stat, termostat, etc).

Capacitate: aprox. 200ml (corespunzator 250g NaCl, 200g NaHCO3)
Rata de adaugare: aprox. de la 50 mg la 50 g Nacl. Selectarea se face digital (cca 1000 trepte)
Programarea: Pana la 27 de perechi viteza dozare-timp dozare
Dimensiuni unitate control: 13 × 7 × 6 cm (L × W × D)
Dimensiuni unitate dozare: 30 × 12 × 5 cm (L × W × D)
Greutate: 950 g
Alimentare: 12 V DC, 5 W
Temperatura de operare: 0 - 40 °C
Umiditate de operare: CE si IEC 1010/1
Siguranta: 0 - 90 %
Telecomanda: 0-10 VDC (viteza de dozare), 3-12 VDC (ON/OFF); RS-485 or 232 (optional)
Type: LAMBDA DOSER / HI-DOSER – microprocessor-controlled programmable powder dosing instrument
Programming: DOSER: up to 27 steps of speed and time; HI-DOSER: up to 99 steps of speed and time
Time resolution: 0 to 999 minutes in 1 minute steps or 0 to 99.9 minutes in 0.1 minute steps: time resolution can be selected individually for each program step
Motor: DOSER: microprocessor controlled stepping motor; HI-DOSER: microprocessor controlled brushless long life BLDC motor with neodymium magnets
Speed control range: 0 to 999
Interface: RS-485 (optional) or RS-232 (optional)
Power supply: DOSER: 95–240 V/50–60 Hz AC plug-in power supply with DC 12V/12W output; HI-DOSER: 95–240 V/50–60 Hz AC plug-in power supply with DC 12V/50W output; possible field operation on 12 V accumulator
Volume: Approx. 0.2 L, 1 L and 3 L glass vessels
Dimensions: DOSER motor unit: 6 (H) x 7 (W) x 13 (D) cm; HI-DOSER motor unit: 10.5 (W) x 9.5 (H) x 13 (D) cm; Glass vessel approx. 0.2 L: 30 (H) x12 (W) x 5 (D) cm; Glass vessel approx. 1 L: 30 (H) x 18 (W) x 14 (D) cm; Glass vessel approx. 3 L: 38 (H) x 21 (W) x 17.5 (D) cm
Safety: CE, meets IEC 1010/1 norm for laboratory instruments
Operation temperature: 0 - 40 °C
Operation humidity: 0-90% RH, not condensing
Remote control: 0–10 V DC (dosing speed control), 3–12 V DC (ON/OFF control); (option 0-20 or 4-20 mA)
Software: PC control software PNet (optional)


Lithium-Ion Battery: Feeding of precursor powder (Silicon & ferrocene [Fe(C5H5)2]; 1 g/min) into surface-wave-sustained (SWS) plasma column (core temperature >4000 K)

Jie, Z., Zhang, Z., Bai, X., Ma, W., Zhao, X., Chen, Q. & Zhang, G. (2023). Surface-wave-sustained plasma synthesis of graphene@Fe–Si nanoparticles for lithium-ion battery anodes. Appl. Phys. Lett. 11 September 2023; 123 (11): 113902.

Keywords: plasma synthesis, graphene@Fe-SI, nanoparticles, lithium-ion battery, anodes, silicon, Ferrocen, LIB, precursor, swirling flow, SWS plasma 


Experimental channel for magnetic particles separation: In the first step, the fly ash was dosed by a LAMBDA dosing system with 1L vessel (mounted above a tray in the middle of the cross-section of the channel) into the horizontal channel and got dispersed by compressed air (3 bar) flowing from a flat nozzle onto the tray.

Czech, T. (2022). Morphology and chemical composition of magnetic particles separated from coal fly ash. Materials, 15(2), 528.

Keywords: fly ash, magnetic particles, electrostatic precipitator, coal combustion

Powder dosing of Al2O3 and other dried sieved particles in a closed-loop aerosol generator: The particles were dosed with a volumetric powder doser LAMBDA DOSER 0.2 L into a 1⁄4” T-piece where the powder got picked up by a stream of compressed air (5 L/min) and guided as aerosol through the installation stream.

Prüfert, C., Beitz, T., Reich, O. & Löhmannsröben, H.-G. (2022). Inline process analysis of copper-bearing aerosols using laser-induced breakdown spectroscopy, laser-induced incandescence and optical imaging. Spectrochimica Acta Part B: Atomic Spectroscopy 197 (2022) 106527. 

Keywords: LIBS, LII, Aerosol. photoacoustics, Stroboscopic imaging, Minerals

Coal particles were introduced into the reactor through a N2-purged microprocessor-controlled programmable powder pump feeder (HI-DOSER, LAMBDA) positioned above the reactor tube...The advantage of this powder pump feeder is that the feeding amount is relatively uniform, avoiding the clogging of the feeder and instability of the gas production.

Dai, T., Xu, C., Zhang, Q., Liu, X., Chang, Z. & Yang, Y. (2022). Experimental study of the solar-driven steam gasification of coal in an improved updraft combined drop-tube and fixed-bed reactor. Energy Conversion and Management, Volume 259,2022,115571,ISSN 0196-8904.

Keywords: Solar-driven gasification, Updraft reactor, Syngas production, Parameter analysis

The integral dissolution heat of the acid-base neutralization was measured in a stirred reactor using a reaction calorimeter (RC1e, Mettler Toledo Ltd.) while LAMBDA DOSER continuously fed acid or base as solids: 23.6 g/min citric acid; 30 g/min NaOH; 21 g/min NaOH; 14.8 g/min NaOH; 7.2 g/min NaOH

Ran, Z., Ni, L., Pan, Y., Chen, Y., Wang, J., Jiang, J. & Shu, C-M. (2022). Safety Criteria for Solid–Liquid Heterogeneous Systems in Semibatch Reactors. ACS Omega 2022 7 (24), 21207-21219

Keywords: Chemical reactions, Dissolution, Liquids, Safety

Catalytic pyrolysis experimental setup: A programmable feeder (LAMBDA DOSER 1L) dispensed plastic pellets, typically at a feeding rate of 120 g/h, into aquartz reactor, which contained 1 kg of 8 mm silicon carbide balls. The ball bed was heated and maintained at 500 ◦C for all tests in this study bya programmable microwave heating system.

Zhou, N., Dai, L., Lyu, Y., Wang, Y., Li, H., Cobb, K., Chen, P., Lei, H. & Ruan, R. (2022). A structured catalyst of ZSM-5/SiC foam for chemical recycling of waste plastics via catalytic pyrolysis. Chemical Engineering Journal, Volume 440, 2022, 135836, ISSN 1385-8947. 

Keywords: ZSM-5; Silicon carbide foam; Catalyst scale up; Waste plastics; Catalytic pyrolysis; Catalyst stability



Experimental design for NOx conversion, comprising a vertically-entrained reactor and gas monitoring systems: A calibrated electronic powder doser (Lambda Laboratory Instruments) feeds the recycled plastic (cryogenically pulverised, 150–355 μm) at a constant low feeding rate of 7 mg/min, through a water-cooled probe, into a quartz reactor housed in an electrically heated three-zone furnace.

Oluwoye, I., Zeng, Z., Mosallanejad, S., Altarawneh, M., Gore, J., & Dlugogorski, B. Z. (2021). Controlling NOx emission from boilers using waste polyethylene as reburning fuel. Chemical Engineering Journal, 411, 128427.

Keywords: Plastic wastes, polyethylene, NOx control, reburning, boiler, economic analysis

Determination of the solubility of itaconic acid dosed with a LAMBDA DOSER 0.2L solids feeder controlled by the PLS

Holtz, A., Görtz, J., Kocks, C., Junker, M., & Jupke, A. (2021). Automated measurement of pH-dependent solid-liquid equilibria of itaconic acid and protocatechuic acid. Fluid Phase Equilibria, 532, 112893. 

Keywords: solubility, pH shift crystallization, electrolyte influence, 2-Methylidenebutanedioic acid, 3,4-Dihydroxybenzoic acid


Iron ore and lime feeding system: LAMBDA Hi-DOSER 1L powder dosing instrument manufactured by LAMBDA Laboratory Instruments, was used to charge the mixture of iron ore and additives fines continuously into the steel crucible during the test runs.

Naseri Seftejani, M. (2020). Reduction of hematite using hydrogen plasma smelting reduction (Doctoral Thesis, Montanuniversitaet Leoben). (2024 Feb. 26)

Keywords of the doctoral thesis: Hydrogen, plasma, hematite, iron oxide reduction

Laboratory Equipment for the hydrogen plasma smelting reduction (HPSR) process: The powder dosing system LAMBDA Hi-DOSER 0.2L was used to introduce continuous ~3 g/min Carajas hematite iron ore with the gas (40 % hydrogen in argon) through the hollow graphite electrode (HGE, inner diameter 5 mm).

Zarl, M. A., Farkas, M. A., & Schenk, J. (2020). A study on the stability fields of arc plasma in the HPSR process. Metals, 10(10), 1394.

Keywords: Arc plasma, arc stability, smelting reduction, iron ore, hydrogen reduction

The feeder LAMBDA DOSER was placed on the top of the DTF to continuously and uniformly feed the pulverized coal with a flow rate of 0.6 to 0.7 g/min. Aims to investigate the hydropyrolysis behavior of pulverized bituminous coal in a drop-tube furnace (DTF) with a temperature of 800–1000 °C.

Gao, R., Dou, B., Chang, Q., Xu, J., Dai, Z., Yu, G., & Wang, F. (2020). Effect of temperature and hydrogen on product distribution and evolution of char structure during pyrolysis of bituminous coal in a drop tube furnace. Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China. 

Keywords: Hydropyrolysis; DTFT; Tar composition; Char structure evolution.


The solid powder feeding system LAMBDA Hi-DOSER 1L was used to feed the premixed iron ore and lime continuously into the plasma arc zone during the arc operation. The powder dispenser consists of a dosing unit and a powder distributor coupled to a stepping motor to control the number of turns per minute and accordingly the dispensing rate.

Seftejani, M. N., Schenk, J., Spreitzer, D., & Zarl, M. A. (2020). Slag Formation during Reduction of Iron Oxide Using Hydrogen Plasma Smelting Reduction. Materials 2020, 13, 935; 

Keywords: slag; basicity; hydrogen plasma; smelting reduction; iron oxide; plasma arc; hydrogen utilisation; degree of reduction; hematite



Alumina Feeding: During electrolysis, alumina (aluminum oxide) was continuously fed to the electrolyte with dosing equipment supplied by LAMBDA Laboratory Instruments. The LAMBDA DOSER was adjusted to continuously feed about 70 - 80% of the alumina needed to perform electrolysis at 100 % current efficiency.

Gunnarsson, G., Óskarsdóttir, G., Frostason, S., & Magnússon, J. H. (2019). Aluminum electrolysis with multiple vertical non-consumable electrodes in a low temperature electrolyte. In Light Metals 2019 (pp. 803-810). Springer International Publishing.

Keywords: Aluminum electrolysis, Inert anode, Metal anode, TiB2 cathode, Low temperature electrolyte 


Experimental setup: A) gas & solid feeding LAMBDA DOSER systems; B) reaction zone and electrical furnace; C) optical sensing system

Díaz, W., Toro, C., Balladares, E., Parra, V., Coelho, P., Reyes, G., & Parra, R. (2019). Spectral characterization of copper and iron sulfide combustion: A multivariate data analysis approach for mineral identification on the blend. Metals, 9(9), 1017. 

Keywords: copper concentrate; pyrometallurgy; flash smelting; combustion; classification; spectroscopy; PCA; SIMCA; PLS-DA; k-NN; support vector machines; rotary feeder; solid feeder


Feeding operation of fed-batch enzymatic hydrolysis conducted by LAMBDA DOSER which received timely commands from LabVIEW (fuzzy logic control system)

Tai, C., Voltan, D. S., Keshwani, D. R., Meyer, G. E., & Kuhar, P. S. (2016). Fuzzy logic feedback control for fed-batch enzymatic hydrolysis of lignocellulosic biomass. Bioprocess and biosystems engineering, 39, 937-944. 

Keywords: Fuzzy Logic Control; Cellulose Conversion Rate; Acid-pretreated Corn Stover; Pretreated Corn Stover; Batch Enzymatic Hydrolysis; Enzyme Feeding; Pretreated Biomass; High Solid Loading; Corn Stover Sample; Glucose Concentration; Glucose Release Rate


Pre-treated (over dried at 60 %, moisture content 2.38 %) lignocellulosic biomass feeding operation for fed-batch enzymatic hydrolysis was controlled by programmed LAMBDA powder DOSER

Tai, C., Keshwani, D. R., Voltan, D. S., Kuhar, P. S., & Engel, A. J. (2015). Optimal control strategy for fed‐batch enzymatic hydrolysis of lignocellulosic biomass based on epidemic modeling. Biotechnology and bioengineering, 112(7), 1376-1382. 

Keywords: Biofuels; Enzymatic hydrolysis; Epidemic model; Fed-batch; Optimal control


Established amounts of spherical and transparent glass particles simulating fuel droplets were introduced into the channel using LAMBDA powder dosing device

Bodoc, V., & Voicu, D. (2014, July). Experimental investigation of the infrared extinction limitations for vapor concentration measurement in a gas/particle flow. In 17th International Symposium on Applications of Laser Techniques to Fluid Mechanics.
HAL Id : hal-01079181 , version 1 (2024 Feb 22)

Keywords: Light Scattering; Vapor Molar Concentration; Infrared Absorption; Laser Beam 

Dried and sieved bagasse particles were fed by the calibrated feeder (LAMBDA DOSER) into the drop-tube trickle-bed reactor

Krüsi, M. (2014). Heat transfer enhancement in a solar biomass gasifier. Eidgenössische Technische Hochschule ETH Zürich (Nr. 21821). 

Keywords: Alternative Energies; Biomass; Fuel Technology; Synthesis Gas


The reactor is fitted with the LAMBDA POWDER DOSER to supply solid NaBH4 continuously

Muir, Sean S. (2013). Sodium borohydride production and utilisation for improved hydrogen storage. PhD Thesis. Australian Institute for Bioengineering and Nanotechnology, The University of Queensland. 


LAMBDA Powder DOSER used as a particle feeder for Drop Tube Reactor (DTR)

Hampp, F., & Janajreh, I. (2011). Development of a drop tube reactor to test and assist a sustainable manufacturing process. In Advances in Sustainable Manufacturing: Proceedings of the 8th Global Conference on Sustainable Manufacturing (pp. 141-148). Springer Berlin Heidelberg. 

Keywords: Gasification, Drop Tube Reactor, Sustainable Product, Development, Small Scale Experiments, Simulation Assisted Design


Copper chloride fed into the quartz reactor by LAMBDA Powder Feeder for producing carbon-coated copper nanoparticles by vapor-phase reduction

Eiroma, K., Forsman, J., Hult, E.-L., Auvinen, A., Sipiläinen-Malm, T., Alastalo, A., Tapper, U., Leppäniemi, J., Mattila, P., Lyyränen, J., Sarlin, J., Jokiniemi, J., & Mössmer, S. (2012). Water-Based Carbon-Coated Copper Nanoparticle-Fluid Formation of Conductive Layers at Low Temperature by Spin Coating and Inkjet Deposition. Journal of Imaging Science and Technology, 56(4), 40501-1-40501-10 (10). 

Keywords: Sedimentation, deposition, copper chloride, nanoparticles, Ethylene glycol, carbon, vapour phase reduction, porous alumina, CNT


Continuous feeding of Copper chloride powder on alumina (Al2O3) pellet bed within a quartz glass nanoparticle reactor to develop Carbon coated copper nanoparticle Inkjet Fluid

Eiroma, K., Auvinen, A., Forsman, J., Hult, E. L., Jokiniemi, J., Koskela, P., Sarlin, J., Sipiläinen-Malm, T., & Tapper, U. (2011, January). Development of conductive carbon coated copper nanoparticle inkjet fluid. In NIP & Digital Fabrication Conference (Vol. 2011, No. 2, pp. 458-461). Society for Imaging Science and Technology. (2024 Feb. 22)
PDF: (2024 Feb. 22)

Keywords: continuous, flow reactor, copper chloride, nanoparticles, gas phase, aluminium oxide, carbon nanotubes, CNT, inkjet, spin coating


Timed particle additions using LAMBDA Powder DOSER to study the fabrication and evaluation of the ferroelectric reinforced metal matrix composites (FR-MMCs)

Poquette, B. D. (2007). Understanding Ferroelastic Domain Reorientation as a Damping Mechanism in Ferroelectric Reinforced Metal Matrix Composites (Doctoral dissertation, Virginia Tech). (2024 Feb. 22)

Keywords: Dispersion Strengthening, Electroforming, Electrodeposition, Electroless Plating, Metal Matrix Composites, Damping, Ferroelectric, Ferroelastic, Twinning






What is the lead time of Powder Doser?

We have DOSERs in stock and it can be delivered to you within a few days from order. Practically, it is only the time taken for shipping

Do you accept Credit Card payments?

You can pay using your credit card via PayPal. Most importantly, it is not necessary to have a PayPal account to make the payment via credit card.

Could you please confirm the particle size that can be fed by the dosing system?

The biggest particle size for powders that could be dosed with our DOSER is about 4 mm. A good dosing of powders depends essentially on the flowing properties of the respective powders to be dosed. In general, homogeneous and free-flowing powders can be dosed best.

How does the LAMBDA DOSER work with the substances which are prone to agglomeration?

The powder / granules / solid must be properly treated for good flowing properties It is also possible to allow a gas flow to pass through the Lambda dosing vessel in order to create a controlled atmosphere.
It is often possible to substantially improve the flowing properties of the respective powder / granules / solid by adding Aerosil (fumed silica – pure SiO2) to your powder (~0.1 - 2% by weight).

How the LAMBDA DOSER reacts to abrasive powders?

In the case of abrasive materials being used with the LAMBDA Powder DOSER, you will have an opportunity to replace the glass vessel and / or the distributors as needed.

What is the accuracy of the each dispensing?

The motor of the driving unit is controlled with quartz-driven electronics, similarly as it is done in electronic watches.Therefore, the accuracy depends mainly on the powder. For best accuracy and precise doses, the powder needs to be free-flowing and homogeneous.

Can the DOSER control the mass flow rate (g/min) of the powder being dispensed?

It is always possible to control the mass flow rate of the powder using the LAMBDA Doser. You could program the DOSER up to 27 pairs of speed and time settings to control your desired mass flow rate (g/min).

Is it possible to control the DOSER via Mettler Toledo titroprocessor to dispense NaF to the titration process when required?

Yes, the powder DOSER can be controlled by Mettler Titration Excellence T50/T70/T90 via RS-232 communication (most common type of connection with Mettler accessories), to dispense the desired amount of powder to the titration process.
The powder DOSER has to be included as RS-232 control in the titroprocessor unit and the desired activity can be selected (e.g.: the signal would switch off the DOSER or switch it on, etc.)
For integration of DOSER with your Mettler titroprocessor, you would need the RS-232 interface activated in the powder dosing unit and RS-232 connection cable.