If there is a risk of a system to run out of solvent during a running and unattended process it is reasonable to install a buffer which is bypassing short term an empty solvent container. This may be the case if:
a system does have long cycle times
a system is run in open access mode
a system is consuming larger volumes of solvent per time unit such as a preparative HPLC system.
The SWM-500 Solvent and Waste Monitor can be configured as a control unit for the continuous solvent supply without interrupt for up to 8 eluents.
For each solvent line there are installed two vessels: a reservoir and a buffer container. A pump is transferring the solvent from the reservoir to the buffer container. The buffer volume is configured on the control unit. If a reservoir runs out of solvent, an alarm is triggered, however the solvent feed continues out of the buffer. The empty reservoir then has to be replaced by a full one in a reaonable time period.
The system is working with a contiuous float measurement. The level of the reservoirs as well as of the buffers is displayed on the touch panel of the control unit.
For safety reasons large volumes (>2L) of organic solvent may not be allowed to be stored in the lab.
The SBS-400 Solvent Buffer System is a mobile and compact system with integrated pneumatic pumps and valves. It has 4 tanks of 10L volume each. The constantly hold volume of a tank can be configured e.g. to be 2L.
It has the same control unit as the SWM-500 beeing entirely configurable by the user.
The system can also be confiugred in that way that one buffer tank is working as a waste container: the solvent then is pumped in the reverse direction.
The resrvoir barrels as well as the waste container of the SBS-400 can be installed in a CO2 secured room or in a safety cupboard, respectively.
The SBS-400 has a compact design and fits to the sub-construction of a hood or a laboratory bench as well; dimensions: 60 x 65 x 65 cm, w x h x d.