Outstanding performance in very low temperatures

These models form part of the Lauda Proline range and have been termed Lauda Proline Kryomats.

All Kryomats are equipped as standard with the proven removable Command console belonging to the Proline range.

This guarantees simple and intuitive operational management.

The control console has an LCD graphics screen which allows rapid changes of settings by the user.

The Proline Kryomats are particularly impressive as a result of their excellent cooling capacity, especially at low temperatures.

Lauda exhibited two new types at Analytica - the RP 4090 C and its water-cooled variant, the RP 4090 CW.

Further variants with different bath sizes and cooling capacities will follow at the end of 2008.

The design of the floor-standing thermostats is extremely compact and therefore saves much valuable laboratory space.

With its large bath volume of up to 40 litres, this equipment is particularly suitable for bath-based applications and can also accommodate a large number of samples.

Proline Kryomats are available either in air or water-cooled versions.

At the present time there are two models available - the air-cooled 4090 C and the water cooled RP 4090 CW.

Both versions cover the working temperature range of -90 to 200C with a maximum heating capacity of 3.5kW and a cooling capacity of 3.1kW at 20C.

The pressure pump with a maximum pressure of 0.5bar achieves a flow rate of 19l/min.

The pump can be adjusted in four steps to suit the required flow capacity and therefore always provides optimum circulation of the bath liquid.

The electronic management system for the cooling water ensures minimum water consumption.

The bath edge heating system is also electronically controlled to prevent moisture in the atmosphere from condensing and freezing at low temperatures.

An opto-decoupled RS 232/485 is integrated into the command control head as standard.

Four additional interfaces are also available as options.

A Profibus module allows integration into a Profibus network with up to 126 units.

The analogue module with two inputs and outputs on a six-pin DIN plug can be set independently to 0(4)-20mA or 0-10V.

Two contact modules with Sub-D plugs or with a Namur plug round off the flexible interface design.

The user can also take advantage of further accessories such as an automatic filling device of the bath which compensates for liquid lost through evaporation.

A constant level controller is also available as a further option; this maintains the level of the liquid in an open, external bath at a constant level.

There is also a cut-off valve to prevent reverse flow from external containers positioned above the bath.

What is called notch impact testing is a typical application for the Lauda Proline Kryomate.

In this testing procedure, test-pieces (normally metal), into which a notch has been machined, are cooled to temperatures as low as -90C.

A swing hammer is then allowed to strike them.

Testing at different temperatures allows conclusions to be drawn about the material's properties.

Further uses are to be found in low temperature applications in process technology and quality control.