1、Compact Size: Portable gases detector, compact ABS body, fallproof and dustproof, quick response, detect leaks quickly, easy to carry and use. 2、High Precise Semiconductor Sensors: Using high-precise semiconductor sensor, with fast response and react very quickly, support more accurate measurement. 3、LCD Display: Color LCD display, suitable for clear and visible data reading in low light at night. With concentration bar display function, it can automatically matching the appropriate color of light according to the measured concentration. 4、Easy to Use: Concentration gases tester+thermohygrometer dual-mode switching, convenient for users to safely detect temperature and humidity, and test a variety of combustible gases types, easyto meet different test needs. 5、Measurable Gases Types (partial list): Can detect a variety of gases, propane, ammonia, benzene, gasoline, hydrogen, naphtha natural gases, paint thinner, carbon monoxide, methane, ethylene oxide, butane, ethanol, ethylene, propylene, butene, acetylene, propyne, butyne, hydrogen sulfide, phosphine, etc. 6、Multifunction Design: With automatic calibration, high and low sensitivity adjustment, manual zeroing, and ℃/℉ temperature units switching functions. 7、Sound\u0026Light Alarm: Sound and light dual prompts, when detecting combustible gases sink leakage, the meter beeps and the concentration bar will increased. 8、Four Models Optional: There are four models available, you can choose from ZL72A (Battery), ZL73A (Battery), ZL72B (Charging), ZL73B (Charging), to meet your different needs. 9、Extended Flexible Probe (Only FOR ZL73A and ZL73B): Universal flexible probe with protective sleeve, retractable and wear-resistant, 180° adjustable, easily cope with a variety of detection environments. 10、Flashlight Function (Only FOR ZL73A and ZL73B): Equipped with an LED flashlight for illumination, easy to cope with various working environments, easy to use at night. 11、Wide Applications: Suitable for water heating device detection, gases pipeline detection, industrial waste gases detection, gases pipeline detection, oil station operation, gases leak detection, etc. Specifications: Name: Combustible Gases Detector Material: plastics Model: ZL72A (Battery), ZL73A (Battery), ZL72B (Charging), ZL73B (Charging) (optional) Battery: according to your selection ZL72A / ZL73A: 3 * 1.5V Battery (not included) ZL72B / ZL73B: 1 * 1000mAh rechargeable battery (included) Display: color LCD disply with backlight Test ranges: 50-10,000ppm Sensitivity: ＜50ppm (methane) Accuracy: ZL72A ZL72B ≤10%FS; ZL73A ZL73B ≤5%FS High and low sensitivity adjustment: YES Response time: 2 Seconds Warm-up time: 30 Seconds Alarm mode:  Analog Bar, Beep Humidity detection: 10-99%RH Temperature detection: -10℃ to 60℃ C/°F Switch: YES Gooseneck hose (with protective sleeve): ZL72A ZL72B NO; ZL73A ZL73B YES LED flashlight: ZL72A ZL72B NO; ZL73A ZL73B YES Manual zeroing is possible: YES Sound on and off: YES Cancel automatic shutdown: YES Automatic shutdown: YES Item size: ZL72A ZL72B: 177 * 47 * 27mm / 6.97 * 1.85 * 1.06in ZL73A ZL73B: 207 * 47 * 27mm /8.15 * 1.85 * 1.06in Item weight: ZL72A ZL72B: 125g / 4.41ounce ZL73A ZL73B: 177g / 6.24ounce Package size: ZL72A ZL72B: 200 * 80 * 50mm / 7.87 * 3.15 * 1.97in ZL73A ZL73B: 230 * 80 * 50mm / 9.06 * 3.15 * 1.97in 1 * Combustible Gases Detector 1 * Guideline