Carbolite LHT Series Fan Assisted High Temperature Bench Mounted Ovens
Carbolite Gero manufactures a range of laboratory ovens for routine lab applications. The laboratory oven models are ideal for general laboratory work and routine heat applications. They all provide excellent temperature uniformity and comply with safety standard BS EN 61010-2-010:2003.
Each laboratory oven may be equipped with a number of options to meet customer requirements. This includes, for example, over-temperature protection, individual shelves and runners for different lab applications, digital timers or more advanced laboratory oven temperature control and programmer systems.
The LHT laboratory high temperature ovens comprise three sizes of bench mounted ovens, each available with maximum operating temperatures of 400 °C, 500 °C and 600 °C.
STANDARD FEATURES
- 400°C, 500°C or 600°C maximum operating temperatures
- 30, 60 & 120 litre capacities
- R38 PID controller
- Heavy duty convection fan for good uniformity
- Low thermal mass insulation for fast response & energy efficiency
- Corrosion resistant, brushed stainless steel interior
- 2 Multi-position shelves
- Suitable for continuous operation
- Hard wearing, zinc coated & stoved epoxy polyester coated exterior
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ManufacturerCarbolite Gero Limited
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Country of OriginUnited Kingdom
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Temperature RangeAmbient +60°C to 400°C, Ambient +60°C to 500°C, Ambient +60°C to 600°C
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Capacity (L)30, 60, 120
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Dimensions: Internal H x W x D (mm)300 x 300 x 305, 400 x 400 x 405, 645 x 455 x 405
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Volts200 - 210 V single phase, 220 - 240 V single phase, 380 - 415 V three phase + N
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Temperature Controller IncludedR38 PID Controller
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Air ConvectionFan Assisted
WHAT IS A LABORATORY OVEN?
A laboratory oven is a heating device that meets the precise temperature control and temperature uniformity requirements of laboratory work. It is a standard piece of equipment in many labs, used for a wide range of applications such as drying, evaporating, or curing. Depending on the requirements, laboratory ovens vary in size and volume as well the maximum temperature they can reach.
WHAT IS THE TYPICAL OPERATING TEMPERATURE OF A LABORATORY OVEN?
The typical operating temperature of a laboratory oven is entirely dependent on the application requirements. Carbolite Gero supplies ovens with maximum temperatures ranging up to 300°C for applications such as drying and moisture extraction, and ovens for applications such as annealing and sintering that can require temperatures up to 600 or 700°C.
WHAT IS THE TYPICAL SIZE OF A LABORATORY OVEN?
Carbolite Gero laboratory ovens range in size from 30 litres up to 910 litres. Ovens with capacities up to 200 litres are usually mounted directly onto work benches, whereas larger ovens are typically floor standing.
A laboratory oven is suitable for drying materials so long as the oven chamber is ventilated. Standard ovens usually have vents that can be opened. Additional ventilation can often be provided by using a moisture extraction fan. You should also consider the material being dried. For lightweight materials and powders the best choice may be a natural convection oven with a vent to avoid blowing material around the chamber.
WHAT SHOULD I CONSIDER WHEN BUYING A LABORATORY OVEN?
When buying a laboratory oven, you should consider the required volume, the maximum temperature, and the temperature uniformity required. It is important to consider the application. If the main purpose is the drying of samples, it may be beneficial to consider modifications specifically designed for moisture extraction. Similarly, if the samples contain low levels of solvents, explosion relief panels and other options designed to relieve pressure and reduce the risk of explosions are required.
WHAT IS THE DIFFERENCE BETWEEN A DOMESTIC AND A LABORATORY OVEN?
A laboratory oven generally has a higher build standard than a domestic oven. Laboratory ovens typically have stainless steel liners designed to withstand the harsher processes, and continuous use, common within commerical laboratories.
IS IT POSSIBLE TO PLACE SAMPLES WITH SOLVENT INSIDE A LABORATORY OVEN?
It is possible to place samples with solvents inside a laboratory oven, provided that the oven is designed to withstand the explosive vapours produced by such processes. Ovens intended for stoving and curing processes should adhere to the safety standard EN1539. Such ovens should include safety features such as explosion relief panels, and airflow levels appropriate for the calculated solvent level of sample materials.
Natural or fan convection?
Simple ovens do not have a fan fitted, but have elements mounted in the chamber base. Air circulates by convection; the warmed air at the base initially rises then falls as it cools. The resulting slow airflow is preferable, for example, for processes involving powders which may be disturbed by fan convection or where there is a risk of cross contamination between samples.
In fan convection ovens the elements are located on the side of the oven and on smaller ovens the fan blows air through an air-guide, over the heating elements and around the chamber. On larger ovens, where there is room for a more complex air guide, the fan pulls air over the elements. The fan action thoroughly mixes the heated air, equalising its temperature before blowing it around the chamber and over the sample. This provides a uniform volume within the oven chamber for applications that require a specific temperature uniformity
Advantages of fan convection
- Ovens heat up and recover the temperature more quickly
- The higher airflow improves the contact between the sample/load and as a result the sample/load also heats up faster
- The airflow conveys the heat to the temperature sensor more quickly, resulting in improved control stability
- The temperature uniformity is improved
- The fan promotes higher airflow in and out of the chamber and speeds up drying by faster removal of vapour (water or solvents – see additional note regarding the use of solvents in ovens) • Variabl