The successful design and well-proved mechanics of PRECIFLOW pump has been extended for a flow rate programming. Up to 99 steps of time and flow rate can be easy programmed allowing a creation of any flow rate profile. The maximum flow rate has been increased up to 3000 ml/ hr. To achieve such a high flow rate in so small instrument the new technology has been used.

0.1 to 3000 ml/h using tubing (internal diameter 0.5 to 4 mm, wall thickness ca. 1 mm)

• Instead of small rollers, which are used by most pump producers, we use bearings of a larger diameter with glass beads. This reduces pulsations, friction and mechanical strain on the tubing leading to better pump performance.
  
• The bearings glide over the tubing so gently, that unlike other pumps, it is unnecessary to prevent 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-center lever and spring made of stainless steel. This assures that a minimal pressure is applied to the tubing which still guarantees good functioning of the pump without unnecessary deformation of the tubing.
  
• The spring also reduces the liquid pressure to approx. 1 bar. This is useful when for any reason the line is blocked.
  
• The asymmetric pump head reduces pulsation.
  
• A high quality stepping motor together with integrated microprocessor electronics assure a high precision of flow rate with no inertia while turning the pump on and off.
  
• The pump head is made from hard, chemically stable epoxide.
  
• The pump dimensions have been minimized. Therefore the HiFLOW pump is considerably smaller than other products of similar performance. The pump is easy to use and saves space in the laboratory.
  
• Remote control and the possibility of flow integration increases the scope of use of the pump in automatically controlled systems (eg. fermentation, chemical synthesis, fraction collection, etc.)
  

high quality/price ratio, low use-costs, easy handling

Remote control of the speed by external voltage 0 - 10 V (0 - 20 or 4 - 20 mA); ON/OFF control by external contact or 3 - 12 V voltage; compatible with other LAMBDA instruments (Pump-flow integrator and Omnicoll fraction collector); RS 485 as option

The HiFLOW pump is the only pump on the market, which allows a simple but precise integration of the amount of liquid which has been transported by the pump.

The electric impulses which move the stepping motor are registered and transformed into a direct current. The voltage can be measured or recorded by common recorders or voltmeters.

In processes where the pump is controlled eg. 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 (eg. esterases, amidases, lactamases and other enzymes). The PUMP-FLOW INTEGRATOR can be placed under the HiFLOW pump.

2 years