Oxygen intelligent tester

CYH25 Coal use with oxygen measuring device (hereinafter referred to as instruments) electrochemical oxygen sensors, embedded microcontrollers intelligent control, four LED display, a dual-purpose machine. Small size, light weight, simple operation, easy maintenance, equipment use film touch switch, good sealing performance, accurate and reliable. --- Wxm 1, the structure of the oxygen measuring device consists of capping, digital, mask, keys, alarm LED and alarm buzzer, circuit boards, battery pack, battery cover, charging screw, electrochemical oxygen sensor, front shell after shell, plate, rings components. 2, works when the instrument is used to measure the oxygen in the air, electrochemical sensor by diffusion in the immediate environment of the gas reacts with the linear change in the voltage signal. After the input signal by the linear amplifier within the microcontroller A / D converter is converted to a digital signal, after the microprocessor data processing, the digital display of the oxygen concentration, when the oxygen concentration is below the alarm set point, the instrument audible light alarm signal. The instrument has a battery voltage alarm and automatic shutdown. 3, the main purpose and scope of this instrument is widely used explosive mixture of flammable gas in the work environment of continuous monitoring of the concentration of oxygen present in the coal mine, and sound and light alarm when overrun. 4, explosion-proof form type: Mine intrinsically safe; proof mark:; b) Relative humidity 0 ℃ ~ 40 ℃:: ≤98%; c) atmospheric pressure: ExibIMb 5, use of environmental conditions a) Operating temperature 86kPa ~ 116kPa ; d) Storage temperature: -40 ℃ ~ 60 ℃; e) has a dangerous coal mine methane or coal dust explosion.