Intelligent gas monitoring instrument

The utility model belongs to a mine gas monitoring device which particularly relates to an intelligent gas monitoring instrument having the functions of detecting in time, displaying gas density, alarming by sound and light when limits are broken through, inputting parameters via a keyboard, communicating with a supervisory computer and conveniently and periodically collecting data. A central processing circuit (2), a sample holding circuit (1) and a communication interface circuit (5) are arranged in a monitoring system of the intelligent gas monitoring instrument composed of a power supply circuit (6), a sound and light alarm circuit (4), a digital display circuit (3) and a keyboard circuit (7). The gas monitoring instrument has the multiple functions of displaying the gas density, alarming by sound and light when limits are broken through, inputting the parameters via the keyboard, communicating with the supervisory computer, conveniently and periodically collecting data, etc. The utility model has the advantages of less power consumption, low cost, simple structure, long service life, stable sensitivity and convenient communication expansion.