Doser - Powder Doser

LAMBDA DOSER / HI-DOSER powder feeder will modernize your laboratory 

The powder dispenser consists of a dosing unit coupled to a digitally controlled stepping motor, allowing the constant and reproducible dosing of solids.

As the DOSER / HI-DOSER powder feeder offers different control options, it can also be used in automatically controlled processes.

Automation of the powder dispensing process in the life sciences, pharmaceutical or analytical laboratory can be done with the programmable powder dosing pump as it reduces human error, risk of spillage and conforms to laboratory safety standards.

Powder dispenser image gallery

The powder dosing instruments such as DOSER 0.2 L, DOSER 1 L, DOSER 3 L, HI-DOSER 1 L, HI-DOSER 3 L and its accessories & consumables can be viewed at www.lambda-instruments.com/powder-doser/doser-hidoser-image-gallery/. 

Properties of LAMBDA DOSER / HI-DOSER powder dosing instrumentDosing rate of powder dispenser

The dosing speed can be set directly on the control display of the powder feeder or remotely from 0–999 speed range for precise and reproducible solid flow rate.

The powder dosing rate depends mainly on the powder properties.

For example, the dosing rate range of NaCl at our laboratory conditions:

• LAMBDA DOSER: 50 mg/min to 50 g/min
• LAMBDA HI-DOSER, slow mode*: 60 mg/min to 60 g/min
• LAMBDA HI-DOSER, fast mode*: 250 mg/min to 250 g/min

*On the HI-DOSER unit, you can work with either slow or fast mode at a time, based on your flow rate requirement.

Program dosing speed, time and pauses

Dosing speeds and dosing times with pauses can be easily programmed locally on the pump display. 

The entered program can be repeated `n` number of times (1-99 or infinite loop) with the “cycle” setting in the program.

Volume of storage vessels

DOSER and HI-DOSER powder feeders are supplied with the following glass vessels:

• Approx. 200 ml or 0.2 L glass vessel
  Corresponds to 250 g NaCl, 200 g NaHCO3 or 150 g sucrose. This capacity is optimal for most laboratory applications.
• 1 L glass vessel (approx. 1 L volume)
• 3 L glass vessel (approx. 3 L volume)

The glass vessels are interchangeable. 

For larger volumes, the side neck in the glass vessel allows filling during operation.

Remote control of powder pump

The whole speed range of powder dispensing can be remotely controlled by applying a voltage of 0-10V.

Switching the powder feeder on and off (ON/OFF) is controlled by an external contact or 12V signal.

The RS-485 or RS-232 interface (optional) allows for enhanced PC control (variable flow rates, flow profile, etc.).

A PC control software PNet is also available (optional).

Please refer the LAMBDA DOSER / HI-DOSER User Manual for connection details.

Data storage and visualization

The PNet PC control software is ideal for remote control of dosing units, data storage and visualization of powder dosing.

You can connect up to 6 powder dispensers via RS-485 interface and cables to USB or serial port of the computer, without having to purchase additional software licenses for the additional laboratory equipment.

The PNet software allows to create dosing profile, record data for analysis or comparison, visualize real time trends and to save data to PC.

Conformity to safety in lab

The powder dispensers LAMBDA DOSER and LAMBDA HI-DOSER allows a safe and reproducible dosing of hazardous chemicals in the lab and conforms to modern safety rules. To protect the laboratory technician or researcher or student, the powder dosing device can also be controlled remotely.

The hermetic construction of the DOSER and HI-DOSER allows safe handling of dangerous and toxic solid substances.

Several seals make the DOSER air-tight and it can be used with a slight over- or under-pressure. 

If the powder sample has to be protected from agglomeration or reaction with air humidity, the glass vessel can be purged with inert gas or dry air using the supplied gassing plug.

If the process needs to be protected from the risk of breakage, you can also order the glass vessels with a silicone coating (outside).

All parts in contact with the powdery substances are made of chemically resistant materials.

Quality standards for powder dosing

LAMBDA DOSER / HI-DOSER powder feeders are recommended for high quality standard of powder dosing in the laboratory.

In addition to the digital setting and precise dosing mechanism, the automatic recording of dosing data makes it an optimal choice to dispense powders under GMP and GLP.

Simple and easy to use lab device

The lab powder dispensers DOSER and HI-DOSER has been designed specially for easy assembly and cleaning.

Fixing to lab equipment: By standard glass adapters

The DOSER and HI-DOSER can be coupled to all common glass recipients having standard ground fittings NS 29/32 or SVL threaded connectors. It can also be fitted to the reactor vessel using an adaptor.

Special attention has been paid to minimizing the dimensions of all parts of the powder dispenser. Thus, DOSER 0.2 L can be adapted easily to complex laboratory installations.

The robust construction and the use of high quality materials assure a long lifetime of the powder feeders.

Economic dispensing of powder portions

Automated dispensing of powder portions in the lab gives the time for the lab staff to work on other tasks.

Due to better reproducibility and elimination of errors, the number of experiments can be reduced.

The DOSER and HI-DOSER offers an excellent price-performance ratio.

Quantification of the dosed substances

The powder DOSER can be configured with the electronic LAMBDA INTEGRATOR (optional) and allows the quantification of the amount of powder added as a function of time. This provides important information on the processes or reactions, e.g. when the DOSER is controlled by a controller (pH-stat, thermostat, etc.).

• Control unit: 6 × 7 × 13 cm (H × W × D)
• Dosing part: 30 × 12 × 5 cm (H × W × D)
• Weight: 950 g
• Power supply: 12 V DC / 5 W, using plug-in power supply (100–240 V, 50–60 Hz)
• Safety: Meets CE and IEC 1010/1 norms for laboratory instruments
• Remote control: 0–10 V DC (dosing speed control), 3–12 V DC (ON/OFF control); RS-485 or 232 (optional)
• Software: PC control software PNet (optional)
• Warranty: 2 years

• 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)