Carbolite

economy laboratory furnaces


Economy Laboratory Furnaces

ELF economy furnace

 Maximum temperature of 1100°C

 Integral digital controller

 Compact design

 Low outer case temperature

 Door isolation switch

 Fast heating models

 Drop down door provides shelf
    for loading and unloading

Introduction

These furnaces - comprising the ELF, EML and EAF form a range of economy furnaces with a maximum operating temperature of 1100°C. Whilst the EAF and EAF are suitable for light duty general laboratory work, the EML is more robust. All models are offered with digital three term controllers.

The drop down door can be used as a shelf when loading and unloading samples. The door plug also acts as a trap for radiated heat,

thus improving the chamber uniformity,whilst the air gap behind the plug minimises the external door temperature.

Safety features on all models include a positive break safety switch which isolates both power lines to the heating elements when the door is opened. Low case temperatures are achieved by using double skin construction to promote natural air convection.



ELF models

The innovative design of the ELF range, with capacities of 6 and 14 litres, features a one piece moulded ceramic fibre chamber with integral heating elements. They offer exceptional performance with traditional quality and reliability. The heating elements are positioned in the sides and roof of the vacuum formed chamber - elements are not located in the hearth to prevent damage from accidental spillage. For additional protection, a hard ceramic hearth tile is available as an option.

These models offer fast heat up - 900°C is achieved in less than 15 minutes. Low thermal mass insulation materials ensure maximum thermal efficiency and allow rapid heating and cooling. Fumes are extracted from the chamber via a ceramic chimney.



EAF models

The economy ashing furnace is of the same construction as the ELF and offers the same chamber dimensions and temperature range, with the addition of a tall chimney to improve the air flow through the chamber for faster burning or drying of the samples. In conjunction with the tall chimney, additional ventilation is provided by air inlets located in the bottom of the door plug - air is drawn through the inlets and up through the chimney.

The EAF is suitable for ashing only small samples and it is recommended that samples with no more than 50g of carbon content should be ashed. The addition of the chimney can extend the life of the heating elements by rapid removal of reactive products which could attack the heating element wire.

For large volume ashing requirements, please refer to the Ashing & Burn Off Furnaces section.



EML model

This model is housed in the same outer case as the ELF and is available with a capacity of 2.5 litres and a maximum temperature of 1100°C. The robust muffle is formed from high thermal mass refractory and is wound with resistance wire whiich heats the chamber from four sides.

The traditional muffle element design combines good temperature uniformity with durability and offers greater protection to the heating elements.

EML model



Specifications
Model ELF 11/6 ELF 11/14 EML 11/2 EAF 11/6 EAF 11/14
Max Temp (°C) 1100 1100 1100 1100 1100
Chamber Dimensions (mm)
(H)
(W)
(D)

165
180
200

210
220
300

90
150
185

165
180
200

210
220
300
External Dimensions (mm)
excluding chimney
(H)
(W)
(D)



580
410
410



630
450
520



580
410
410



580
410
410



630
450
520

Chamber capacity (litres) 6 14 2.5 6 14
Max Power (W) 2000 3000 1750 2000 3000
Holding Power (W) 800 1300 600 1100 1700
Heat Up Time (mins)
to 100°C below max
12 13 65 14 16
Air changes per minute N/A N/A N/A 4 2
Temperature Sensor K K K K K
Weight (kg) 18 26 20 18 26