Feature:1. FAST-RESPONSE GAS-SENSITIVE SEMICONDUCTOR SENSOR: Utilizing high-precision gas-sensitive semiconductor sensors, capable of measuring various combustible gases.2. HIGH/LOW SENSITIVITY SELECTION: Provides more precise detection of combustible gas leaks.3. AUDIBLE AND VISUAL ALARMS: Utilizes analog bars, red backlight, and audible alarms as triple warning methods. When a combustible gas leak is detected, the instrument emits a beep, the concentration analog bar increases, and the screen backlight changes from green to red.4. AUTO-POWER OFF: The instrument will automatically power off if there is no operation within 5 minutes.5. LCD DISPLAY SCREEN: In low-light conditions, the data is clearly visible, making it easy to monitor the current working status of the instrument.Specification:This meter is a combustible gas leakage detector, which is used to detect the leakage of combustible gas quickly and reliably.Features:FAST-RESPONSE GAS-SENSITIVE SEMICONDUCTOR SENSOR: Utilizing high-precision gas-sensitive semiconductor sensors, capable of measuring various combustible gases.HIGH/LOW SENSITIVITY SELECTION: Provides more precise detection of combustible gas leaks.AUDIBLE AND VISUAL ALARMS: Utilizes analog bars, red backlight, and audible alarms as triple warning methods. When a combustible gas leak is detected, the instrument emits a beep, the concentration analog bar increases, and the screen backlight changes from green to red.AUTO-POWER OFF: The instrument will automatically power off if there is no operation within 5 minutes.LCD DISPLAY SCREEN: In low-light conditions, the data is clearly visible, making it easy to monitor the current working status of the instrument.Specifications:Model: HT56 / HT56 Pro (Optional)Material: ABSSensor: Gas-sensitive semi-conductorRange: 100~1000ppmReactions Sensitivity: Approx. 1%LEL (100PPM)(methane)Display: LCDAutomatic Power Off: YesLow Battery Indication: YesDual Color Backlit: YesSensitivity Selection: YesBuzzer Alert: YesWarm-Up Time: Approx. 30 secResponse Time: ≤500PPM: Approx. 5 sec; 500PPM: Approx. 2secAlarm Mode: Visible and audibleOperating Conditions: 0~50 / 20~80%RHStorage Conditions: -10~60 / 20~80%RHPower Supply: 2 * 1.5V AAA battery (Not included)Safety Rating: EN61326-1Extend Size: 310 * 24 * 28mm / 12.20 * 0.94 * 1.10inNormal Size: 205 * 24 * 28mm / 8.07 * 0.94 * 1.10inItem Weight: 62g / 2.18ozPackage Weight: 129g / 4.55ozPackage Size: 25.5 * 6.5 * 4cm / 10.04 * 2.56 * 1.57inPackage List:1 * Pen-type Gas Leak Detector1 * User Manual (English)Package List:1 * Pen-type Gas Leak Detector1 * User Manual (English)