Ink jet with residual ink detection that compensates for different ink properties

An ink jet recording apparatus comprising:

• a replaceable ink tank for storing ink to be supplied to an ink jet head;
• electrodes arranged in said ink tank;
• and
• residual ink quantity detection means for detecting residual ink quantity in said ink tank in accordance with a resistance value, current value or voltage value from said electrodes,
• wherein said replaceable ink tank includes correction means for correcting said resistance value, current value or voltage value in accordance with a difference in the resistance of the ink stored in said ink tank.

A replaceable ink jet head comprising:

• an ink path communicating with an ink discharge opening for discharging ink;
• electrodes arranged in said ink path;
• and
• correction means for correcting a resistance value, current value or voltage value detected by residual ink quantity detection means for detecting residual ink quantity in said ink path, in accordance with a difference in the resistance of the ink associated with said ink jet head.

A replaceable ink tank comprising:

• an ink storing portion for storing ink to be supplied to an ink jet head;
• electrodes arranged in said ink storing portion;
• and
• correction means for correcting a resistance value, current value or voltage value detected by residual ink quantity detection means for detecting residual ink quantity in said ink storing portion, in accordance with a difference in the resistance of the ink stored in said ink tank.

An ink jet recording apparatus comprising:

• a replaceable ink supply source for storing ink to be supplied ink jet head;
• electrodes arranged in said ink supply source;
• residual ink quantity detection means for detecting residual ink quantity in said ink supply source in accordance with a resistance value, current value or voltage value from said electrodes;
• and
• determining means for determining a residual ink quantity detection threshold value for said resistance value, current value or voltage value in correspondence with said ink supply source,
• wherein said ink supply source includes means for presenting information for determining said threshold value in accordance with the ink stored in said ink supply source.