Brief Introduction The DN-B3000 Combustible Gas Detector is an instrument capable of continuously detecting the concentration of natural gas in the operating environment. The detector uses natural diffusion to detect gas concentration and employs imported sensors, offering excellent sensitivity and outstanding repeatability. The instrument adopts embedded micro-control technology, featuring simple menu operation, comprehensive functions, and high reliability. Detailed Description Main Features ◎ Low power consumption, long standby time ◎ Built-in vibrator, suitable for use in very noisy environments during alarms ◎ 6 ultra-high bright LED tubes light up in rotation, simultaneously driving the buzzer to emit an intermittent "beep--beep--" sound ◎ Uses LCD display with full Chinese menu operation ◎ High and low limit concentration alarms, alarm set points adjustable across full scale ◎ Compact size, dimensions: 110mm×55mm×25mm ◎ Special housing material provides excellent anti-slip effect Technical Parameters ◎ Operating Voltage: DC3.6V (rechargeable battery) ◎ Detection Method: Free diffusion type ◎ Detection Principle: Catalytic combustion type ◎ Detected Gas: See attached table ◎ Display Method: LCD display ◎ Alarm Method: Acoustic, optical alarm, vibration ◎ Accuracy: ±5%FS ◎ Response Time: ≤30s ◎ Sound Intensity: ≥75dB ◎ Measurement Range: 0-100%LEL ◎ Alarm Point: 25%LEL (adjustable) ◎ Resolution: 1%LEL;