Lambda - Peristaltic Pumps

Properties of LAMBDA peristaltic liquid pumps

Practical, precise and reliable peristaltic pump which is the most compact in its class:

• Flow rates from 0.01 to 60,000 ml/hour
• Most compact peristaltic pump of its class on the market
• Greatly extended tubing life and decreased pulsation
• Automatic switch ON and OFF without using a timer
• Very economic in use while using low cost tubing without stoppers
• 5 year warranty on LAMBDA PRECIFLOW and MULTIFLOW pumps
• Low maintenance
• Meets safety standards CE and IEC 1010/1 for the laboratory

The special mechanics of LAMBDA peristaltic pumps has been developed because no pump can be used for continuous fermentation experiment lasting up to eight weeks.

Stand-alone laboratory peristaltic pump

• Digital speed setting from 0 to 999 (in clockwise and counter-clockwise direction)
• Flow rate programmable in both directions: MULTIFLOW, HiFLOW, MAXIFLOW and MEGAFLOW
• Plug-in power supply: 90-240 V / AC, 50-60 Hz, output 12 V / DC

The peristaltic pumps can be used together with laboratory fermenters, bioreactors, fraction collectors, autosamplers and other lab equipment.

Remote control (analog and digital) of pumps

• ON/OFF by an external signal
• Control over the whole speed range (0 - 10 V DC, optional: 0-20 or 4-20 mA)

LAMBDA peristaltic pump can be connected to the process control software (PCS) or to PC/laptop via RS-485 interface or RS-232 interface.

Optional accessories for peristaltic pumps

LAMBDA offers the following optional accessories with peristaltic pumps:

• Silicone pump tubing, Viton pump tubing
• Foot-switch controlled liquid dispensing
• Cable to connect with car battery (filed application)
• PUMP-FLOW INTEGRATOR for recording of total volume pumped

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, etc.

Several remote control possibilities:

• RS-485 or RS-232 interface (optional) for connection to PC software
• Cables and connections for remote control (analog and digital)
• Pump control software PNet for data acquisition, real-time visualization and remote control

Problems with the traditional peristaltic pumps are solved!

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 LAMBDA laboratory pumps so efficient?

Instead of small rollers, which are used by most pump producers, bearings of a larger diameter with glass beads are used. This reduces pulsations, friction and mechanical strain on the tubing which leads to better pump performance.

The bearings glide over the tubing so gently, unlike other pumps, it is not necessary to prevent the movement of the tubing by a special fixation. In this manner, the life time of the tubing is considerably increased.

The pressure on the tubing is delivered individually through an off-centre lever and spring made of stainless steel.

This assures a minimal pressure is applied to the tubing which still guarantees a good functioning of the pump without unnecessary deformation of the tubing.The spring also reduces the liquid pressure to approx. 1 bar. It is useful when the tubing line is blocked, for any reason.

A special off-centre lever using a spring of non-corrosive material applies the compression force on the tubing softly and gradually.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 is excellent.A special off-centre lever using a spring of non-corrosive material applies the compression force on the tubing softly and gradually.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 is excellent.  

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.

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.

• Even without any fixation the tubing will not move at all in or out of the head.
  Since the lateral forces on the tubing have been eliminated, no stoppers are required. 
• Tubing life increases considerably and flow rates remain constant, since the tubing compression is kept in the range of elasticity of the tubing.
• The tubing economy is very important. Low cost tubing can be used with good results.

LAMBDA PRECIFLOW peristaltic pump will be paid back after consumption of about 80 m of tubing

• Type: Microprocessor-controlled programmable laboratory peristaltic pump
• Programming: up to 99 steps of speed and time
• Time resolution: 0 to 999 minutes in 1 minute steps; 0 to 99.9 minutes in 0.1 minute steps
• Accuracy: ± 1%
• Reproducibility: ± 0.2 % (electronics)
• Flow rate range:
• PRECIFLOW & MULTIFLOW: 0.2 µl/min - 600 ml/h
• HIFLOW: 1 µl/min - 3,000 ml/h
• MAXIFLOW: 3 µl/min - 10,000 ml/h
• MEGAFLOW: 0.02 ml/min - 60,000 ml/h
• Tubing: Silicone tubing or other materials having similar elasticity
• Non-volatile memory: storage of all settings
• Maximum pressure:
• PRECIFLOW, MULTIFLOW, HIFLOW & MAXIFLOW: approx. 0.1 MPa in clockwise rotation; approx. 0.15 MPa in counter-clockwise rotation
• MEGAFLOW: approx. 0.18 MPa in clockwise rotation; approx. 0.2 MPa in counter-clockwise rotation
• Motor :
• PRECIFLOW & MULTIFLOW: microprocessor controlled stepping motor
• HIFLOW, MAXIFLOW & MEGAFLOW: microprocessor controlled brushless long life BLDC motor with neodymium magnets
• Speed control range: 0 - 999
• Interface: RS-485 or RS-232 (optional)
• Remote control : 0-10 V; (option 0-20 or 4-20 mA); foot switch; ON/OFF; ! For safety reasons the voltage of the remote signal to earth must not exceed 48 V DC
• Dimensions : 10.5 (W) × 9.5 (H) × 10.5 (D) cm (PRECIFLOW, MULTIFLOW, HIFLOW & MAXIFLOW); 18 (W) x 13 (H) x 16 (D) cm (MEGAFLOW)
• Weight: <1 kg (PRECIFLOW & MULTIFLOW); 1.2 kg (HIFLOW & MAXIFLOW); 2.5 kg (MEGAFLOW)
• Safety: CE, meets IEC 1010/1 norm for laboratory instrument
• Operation temperature: 0 – 40 ⁰C
• Operation humidity: 0-90% RH, not condensing