Feature: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.Specification:Specifications:Name: Combustible Gases DetectorMaterial: plasticsModel: ZL72A (Battery), ZL73A (Battery), ZL72B (Charging), ZL73B (Charging) (optional)Battery: according to your selectionZL72A / ZL73A: 3 * 1.5V Battery(not included)ZL72B / ZL73B: 1 * 1000mAh rechargeable battery(included)Display: color LCD disply with backlightTest ranges: 50-10,000ppmSensitivity: ＜50ppm (methane)Accuracy: ZL72A ZL72B ≤10%FS; ZL73A ZL73B ≤5%FSHigh and low sensitivity adjustment: YESResponse time: 2 SecondsWarm-up time: 30 SecondsAlarm mode: Analog Bar, BeepHumidity detection: 10-99%RHTemperature detection: -10℃ to 60℃C/°F Switch: YESGooseneck hose (with protective sleeve): ZL72A ZL72B NO; ZL73A ZL73B YESLED flashlight: ZL72A ZL72B NO; ZL73A ZL73B YESManual zeroing is possible: YESSoundon and off: YESCancel automatic shutdown: YESAutomatic shutdown: YESItem size:ZL72A ZL72B: 177 * 47 * 27mm / 6.97 * 1.85 * 1.06inZL73A ZL73B: 207 * 47 * 27mm /8.15 * 1.85 * 1.06inItem weight:ZL72A ZL72B: 125g / 4.41ounceZL73A ZL73B: 177g / 6.24ouncePackagesize:ZL72A ZL72B: 200 * 80 * 50mm / 7.87 * 3.15 * 1.97inZL73A ZL73B: 230 * 80 * 50mm / 9.06 * 3.15 * 1.97in.Package List:1 * Combustible Gases Detector1 * Guideline