LAMBDA PRECIFLOW, MULTIFLOW, HIFLOW, MAXIFLOW and MEGAFLOW peristaltic pumps
have been developed for continuous cultures as the result of twenty years of
laboratory experience and involved the systematic elimination of the imperfections
found in other pumps on the market.
PERISTALTIC PUMPS PRECIFLOW-MULTIFLOW-HiFLOW-MAXIFLOW-MEGAFLOW OVERVIEW
The result is a practical, precise and reliable pump, which is the most compact
in its class:
- • Flow rates from 0.01 to 10000 ml/hour
- • Digital speed setting from 0 to 999
- • New motor technology
- • Extensive remote controls
- • Greatly extended tubing life and decreased pulsation
- • Flow rate programming (up to 99 steps)
- • By programming zero flow rates the pump can be switched on and off without using a timer
- • Very economic in use while using low cost tubing without stoppers
- • Most compact pump of its class on the market
- • Access to reaction kinetics by using the LAMBDA pump-flow INTEGRATOR
- • Low voltage plug-in power supply for maximum safety
- • RS-485 or RS-232 interface (optional)
- • Pump control software PNet (optional)
The special mechanics of LAMBDA peristaltic pumps has been developed because no pump could be used for continuous fermentation lasting up to eight weeks.
The most frequent problems of traditional peristaltic pumps are:
- • Aspiration of the tubing by the mechanics
- • Rupture of the tubing and leaking of the solution
- • Flow rate decrease over time
- • When a continuous process is interrupted a lot of time and money are lost
During the development of the new LAMBDA peristaltic pump mechanics all aspects of existing peristaltic pumps have been analyzed and finally an efficient solution has been found.
What makes these new pumps so efficient?
- • Rollers of small diameter apply a high strain onto the tubing and push the tubing in
the direction of the sense of rotation. Therefore, the tubing has to be fitted with
stoppers. We use rollers of very large diameter – this leads to the elimination of
such strains and prevents tubing motion. A larger portion of tubing is compressed with
better pressure distribution. The elasticity of the tubing is
- • Instead of rollers we use special plastic ball bearings with
glass beads. The gliding of such rollers requires only a
minimal force and the corrosion resistance in the case of spill
- • A special off-centre lever using a spring of non-corrosive material applies the
compression force on the tubing softly and gradually.
- • The final pressure of the liquid is reduced by the spring to 0.1–0.2 MPa (according to
the tubing used). The pressure does not increase even when the line is blocked.
- • The pump head is large and has two centers of asymmetry, which reduces
pulsation several times. The head is made of hard, chemically stabilized material
- • The stepping motor or BLDC motor, driven by quartz-controlled electronics, assures a high precision of the flow rate. The ratio of speed control is 1:1000.
- • Several possibilities of remote control.
- • The unique flow integrator LAMBDA INTEGRATOR makes the LAMBDA peristaltic
pumps excellent for the use in automatically controlled systems e.g.
fermentation, bio cultures, chemical synthesis, fraction collection and many more.
- • The laboratory space is very expensive, therefore we have made our peristaltic
pumps as compact as possible (all have just 1 l of volume). They are several times
smaller than other peristaltic pumps on the market and therefore so handy in use.
Benefits of great importance for your laboratory
- • Since the lateral forces on the tubing have been eliminated, no stoppers are required.
Even without any fixation the tubing will not move at all in and out of the head.
- • Since the tubing compression is kept in the range of elasticity of the tubing the tubing
life increases considerably and flow rates remain constant.
- • Low cost tubing can be used with good results. The tubing economy is very
important, e.g. the LAMBDA PRECIFLOW peristaltic pump will be paid back after
consumption of about 80 m of tubing.
PROPERTIES OF LAMBDA PERISTALTIC PUMPS
||0 - 60'000 ml/hour
||up to 99 steps
||up to 99 steps
||up to 99 steps
||up to 99 steps
|Power (max. W)
* tubing made of silicone or other material with similar elasticity (internal diameter 0.5 to 4 mm, wall thickness ~1 mm)
All LAMBDA peristaltic pumps have the same following characteristics:
- • Digital speed control in the range 0:1000
- • Analog remote control ON/OFF and full range speed control (0–10 V)
- • RS 485 or RS 232 interface (optional)
- • Very small dimensions: 10.5 (W) × 9.5 (H) × 10.5 (D) cm
- • Very quiet operation
- • Plug in switching power supply for mains 90–240 V/AC, 50–60 Hz, output 12 V/DC
- • Long life even with low cost tubing without stoppers
- • Safety conform to CE and IEC 1010/1
Electronic integrator LAMBDA INTEGRATOR
The use of the electronic flow integrator LAMBDA INTEGRATOR
together with the LAMBDA peristaltic pumps allows a simple but
precise integration of the amount of liquid, which has been
transported by the pump..
The electric impulses, which move the motor, are registered and
transformed into a direct current. The voltage can be measured or
recorded by common recorders or voltmeters. The RS 485 or RS 232 interface allows the connection
to a PC.
In processes where the pump is controlled e.g. by a pH-stat during a fermentation (to keep
the pH of the medium constant), it is frequently important to know when and how much acid
or base were added. This data yields important information about the process, its
kinetics and time of completion..
The Integrator can also be used for measuring enzyme activity (e.g. esterases, amidases,
acylases, lipases, proteases, lactamases and other enzymes).
The pump-flow integrator can be conveniently placed under the peristaltic pump. The
Integrator connected to LAMBDA peristaltic pumps allows new and unusual applications
of peristaltic pumps (gradient making, counter flow elution, liquid chromatography,
electronic burette, etc.) as shown in the following figure:
Utilization of the LAMBDA peristaltic pumps