Macherey-Nagel thermoblock NANOCOLOR VARIO 4, two separate blocks, 24 positions, 919300

Anyone who has to process large sample runs using different digestion methods on a daily basis is familiar with the time-related issue: if a COD digestion is currently running at 148 °C in a single thermoblock, a nitrogen digestion at a different temperature has to wait until the thermoblock has been readjusted and stabilised again. The Macherey-Nagel NANOCOLOR VARIO 4 thermoblock solves this problem with two completely separate heating blocks, each of which is controlled independently to different temperatures. This allows two different digestion methods to run simultaneously rather than one after the other, processing up to 24 samples per run in total without any waiting time between them. This makes the VARIO 4 the model with the highest capacity in the entire NANOCOLOR VARIO range and a suitable choice for laboratories reaching their capacity limits.

Two independent blocks for parallel methods

Each of the two blocks has 12 bores with an external diameter of 16 mm, as well as its own temperature control, its own standard temperatures and its own freely definable programme slots, completely independent of the other block. This allows, for example, COD and nitrogen digestion to be carried out simultaneously in separate blocks, without one block having to be readjusted between two methods. For laboratories with high sample throughput and varying digestion methods, this significantly reduces the overall turnaround time compared with a single-block instrument, as there is no longer any need to wait for a new target temperature to be reached.

Precise temperature range, user-friendly operation

Both blocks cover a temperature range from 40 to 160 °C in 1 °C increments, with a stability of ±1 °C according to DIN, EN, ISO and EPA methods. Six preset standard temperatures and six freely definable programme slots per block cover routine and specialised methods, each block adjustable independently of the others. Operation is via a backlit colour touchscreen display with an icon-based menu in nine languages, including German, English and French.

Space-saving for everyday laboratory use

With external dimensions of 287 x 290 x 146 mm and a weight of 4,200 g (gross, including packaging), the VARIO 4 takes up around 1.7 times the footprint of the single-block models in the range (287 x 290 mm compared with 282 x 169 mm), with double the block capacity. This is less than the space needed for two separately installed single-block units.

Network-ready and documentation-capable

RS232, USB-A and USB-B interfaces enable connection to PC systems and data exchange; free software updates can be installed via the internet/PC or a USB stick. This facilitates integration with existing laboratory software and the transfer of test reports from both blocks. In combination with the optional NANOCOLOR T-Set (919917) or the USB version (919921), automatic calibration including a test certificate according to DWA-A 704 is possible.

Safe in everyday laboratory use

The VARIO 4 meets CE requirements and is designed for an ambient temperature range of 10 to 40 °C and a maximum humidity of 80 % (non-condensing), even during continuous operation with two blocks running simultaneously.

Position within the NANOCOLOR VARIO family

Within the NANOCOLOR VARIO family, the VARIO 4, with 24 positions and two independent blocks, is the model with the largest capacity. The VARIO Mini, with 6 positions, is significantly better suited to mobile use on site; for standard laboratory routines, the VARIO C2 with 12 positions is suitable; and for larger digestion vessels, the VARIO C2 M with 22 mm bores and 10 positions is suitable. Those who require shorter cooling times in addition to high throughput will find the VARIO HC with active cooling a suitable option, although it features just one block and 12 positions instead of two blocks.

Typical areas of application

The VARIO 4 is designed for laboratories with high throughput and simultaneous method requirements, for example where a contract laboratory needs to process several client orders with different parameters simultaneously in the morning, rather than running them one after the other using a single block:

• High sample throughput in large sewage treatment works and central wastewater laboratories
• Simultaneous COD and nitrogen or phosphorus digestion in separate blocks
• Environmental and contract laboratories processing multiple methods and client orders in parallel
• Drinking water suppliers with an extensive range of parameters and fixed processing times
• University laboratories and training centres where several research groups require different digestion methods simultaneously

Technical details

Scope of delivery

• 1x NANOCOLOR VARIO 4 thermoblock
• 1x mains cable
• 2x folding protective covers (one per block)
• 1x operating instructions
• 1x data cable
• 1x software DVD
• 1x certificate

Individual requirements & procurement service

Do you need suitable NANOCOLOR cuvette tests, a T-Set for automatic calibration or accessories for other thermoblock models? Our procurement service will be happy to help you choose suitable products.