I use a small electric kiln for low-firing clay, which can reach a maximum temperature of 1,100 degrees.
The bisque firing is brought to temperature very slowly through an electronic programmable controler. It reaches a maximum of between 900 and 980 degrees. It takes about 24 hours for a complete cycle.
Low-firing earthenware clays are glazed between 1,000 and 1,050 degrees.