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Gradient Furnace for temperatures bellow 1200 ˚C
Gradient furnace is a small cylindrical laboratory furnace, which is designed to be placed on a table and which is constructed according to standard ASTM C 829 - 81. Heating zone has a diameter of 24 mm and a length of 500 mm. Heating element is designed in a way, that a temperature drops uniformly down from the center of the furnace to its borders. This happens on the length of 150 mm (in the furnace, there are two gradients, each having length of 150 mm). The boundary temperatures are set manually. Temperature inside the furnace should not exceed 1.200 ˚C and the temperature difference should not be greater than 500 ˚C (bigger differences can cause a deformation of gradient).
The furnace is delivered together with a traveller for a precise measurement of temperature inside the furnace. The traveller can be attached on both sides of the furnace and in steps of length 2,5 mm and 5 mm respectively, it can be used to measure a temperature characteristic along the working range. This measurement is done either manually from the control panel or automatically from PC. The software for this purpose is delivered together with the furnace.
Dimensions, as well as other parameters, can be modified according to a customer demands.
Furnace
| Maximal temperature | 1.200 ˚C | |
| The inner dimensions of the furnace | diameter | 24 mm |
| length | 500 mm | |
| Supply voltage | 230 V | |
| Wattage | 1.000 VA | |
| Temperature control | 2 x regulator e2132 | |
| Regulatory thermocouple | 2 x type S | |
| Length of working gradient | 2 x 150 mm | |
| Maximal temperature gradient | 500 ˚C | |
| Heating of furnace up to 1.000 ˚C | 20 min | |
| Spontaneous cooling 700 ˚C -> 200 ˚C | 1 hour | |
| Total weight | 35 kg |
Traveller
| Maximal temperature | 1.200 ˚C | |
| Working range | 160 mm | |
| Traveller step length | 2,5 / 5 mm | |
| Supply voltage | 230 V | |
| Maximal power consumption | 100 VA | |
| Temperature indicator | regulator e3508 | |
| Measuring thermocouple | type S | |
| Traveller control | manual | from panel |
| automatic | from SW | |
| Time for measurement of the working range | 1 hod | |
| Communication interface | ETHERNET | |
| Traveller assembling | holders on the foreheads of the furnace | |
| Total weight | 5 kg |
This product was probably delivered to Czech Republic only so there is no documentation available in English for now. If you have any questions about this product, we are ready to answer any of your questions.
Gradient Furnace
An Overview of gradient furnace with connected traveller to measure the temperature gradient.
Traveller controller
This panel controlls the stepper motor which the measurement head is connected to. It contains the controller e3508 showing an actual temperature and a few buttons to controll the stepper motor. (When Man -> Aut is switched, the stepper mottor is controlled by the SW).
Heater
It can be seen after the top cover and the insulation are removed.
Traveller connection
A detail, how the traveller is connected to the gradeint furnace.
Temperature Measurement
Temperature measurement inside the furnace.
Measurement result
The gradient furnace was set to 700 ˚C and 0 ˚C and the temperature characteristic (blue) was measured twice (measurement errors red).