LR-Cal Temperature calibration baths

Models for portable use (e.g. on site) or stationary use (e.g. in laboratory)
Controlled temperature source for calibration purposes
Models from -40°C to +300°C
Accuracy up to 0.15°C
Stability up to ±0.02°C

Model overview

LR-Cal FLUID 100

Portable micro bath
Temperature range -17°C...+125°C
Accuracy ±0.15°C, Stability ±0.02°C

LR-Cal FLUID 100-N

Portable micro bath
Temperature range -17°C...+140°C
Accuracy ±0.15°C, Stability ±0.02°C

LR-Cal LTC 100-F

Portable advanced micro bath, touch screen
Temperature range -35°C...+165°C
Accuracy ±0.1°C, Stability ±0.01°C
Reservoir 60 mm diameter, 195 mm insertion depth, 0.7 litres volume

LR-Cal LTC 100-F-PLUS

Portable advanced micro bath, touch screen
Temperature range -40°C...+165°C
Accuracy ±0.1°C, Stability ±0.01°C
Reservoir 60 mm diameter, 195 mm insertion depth, 0.7 litres volume

LR-Cal FLUID 200

Portable micro bath
Temperature range: ambient temp...+200°C
Accuracy ±0.15°C, Stability ±0.02°C

LR-Cal FLUID 200-H

Portable micro bath
Temperature range: ambient temp...+250°C
Accuracy ±0.15°C, Stability ±0.03°C

LR-Cal LTC 200-F

Portable advanced micro bath, touch screen
Temperature range +35°C...+225°C
Accuracy ±0.1°C, Stability ±0.01°C
Reservoir 60 mm diameter, 195 mm insertion depth, 0.7 litres volume

LR-Cal BK 40-M

Stationary cryostatic bath
Temperature range -40°C...+125°C
Accuracy ±0.2°C, Stability ±0.05°C

LR-Cal TB 300-M

Stationary cryostatic bath
Temperature range -+50°C...+300°C
Accuracy ±0.2°C, Stability ±0.05°C

Calibration fluids / media

Calibration Fluids for LR-Cal Temperature Calibration Baths

Thermostatic baths / liquid baths / temperature calibration baths can be filled with three different types of substances:

Media that are in a liquid state at ambient temperature, such as oil, alcohol, mixtures with water-alcoholic base.
Biphasic fluids that turn liquid in a temperature field where the bath is expected to be used, composed of mixtures of potassium and sodium salts that are in a solid state at ambient temperature and that from about 150°C to about 500°C turn liquid and can be used as calibration liquids in specific thermostatic baths.
Other solid substances that - in specific conditions - turn to a state similar to the liquid state, for example sands or alumina powders with extremly thin granularitary that through an air insufflation in specific thermostatic baths behaves similar to a liquid.

LR-Cal DRUCK & TEMPERATUR Leitenberger GmbH - in its standard temperature calibration baths - does not use biphasic fluids since, although their temperature field is very wide, they are very dangerous and ca cause explosions in particular working conditions.

LR-Cal DRUCK & TEMPERATUR Leitenberger GmbH does not manufacture temperature calibration baths / thermostatic baths / liquid baths using alumina powders since it is not possible to completely eliminate the powders that are continuously discharged from the bath opering, causing therefore some problems as far as environmental compatibility is concerned.

The liquids, sold by LR-Cal DRUCK & TEMPERATUR Leitenberger GmbH are mostly oils and glycol-based anti-freezing mixtures. The operating instruction of every single equipment contain an indication of the best liquid to be used for excellent performances.

Liquid types	Recommenced usage field *)	Temperature value above which an extractor hood should be used **)	Fume burning point ***)	Equivalent temperature for 10cst viscosity ****)	Freezing temperature *****)
Glycol 56% + water	-40...+90°C	+70°C	>110°C	+20°C	-43°C
Silikone 200c5	-40...+130°C	+110°C	+136°C	+5°C	-65°C
Silikone 47V10	-30...+150°C	+120°C	+150°C	+20°C	-65°C
Silikone 47V20	-20...+230°C	+130°C	+230°C	+60°C	-60°C
Silikone 47V50	+30...+250°C	+140°C	+280°C	+160°C	-55°C
Silikone 47V100	+50...+250°C	+170°C	>300°C	+200°C	-55°C
Silikone 710	+80...+280°C	+200°C	>300°C	+150°C	-22°C

Silicone Oil AC 10	-30...+160°C		+170°C
Silicone Oil AC 20	-20...+200°C		+240°C
Silicone Oil AC 50	+30...+220°C		+280°C
Silicone Oil AC 100	+70...+288°C		+315°C

*)	Recommended usage field: range of temperature in which it is possible to use the liquid in LR-Cal baths, although the viscosity is not good to optain the best performances.
**)	Temperature value above which an extractor hood should be used: Temperature value above which an extractor hood should be used bcause the fume increases.
***)	Fume burning point: Temperature value on which steam triggers off in the presence of free flames.
****)	Equivalent temperature for 10cst viscosity: Temperature value below which the thermostatic performance is no longer excellent. The viscosity value tends to decrease as temperature increases. The equivalent water value at 23°C is 1cst
*****)	Freezing temperature: Temperature value below which the liquid changes its state and solidifies.

The calibration liquids are degenerated during usage. As higher the temperature and as longer the time of high temperatures, as faster is the degeneration of the fluid. For this reason: avoid high temperatures for longer times.

Explanation

What is "temperature calibration" with micro baths?

With LR-Cal temperature calibration baths, a controllable temperature is produced within a liquid tank, with the aim of calibration thermometers by comparison of measured values (unit under test versus reference).

A LR-Cal portable temperature calibration bath consists, at the very least, of a liquid tank, a correctly selected liquid for the tank and a calibrator thermometer (internal reference) with a display for determining the tank temperature.

The components mentioned above are combined as a compact instrument (portable models).