This meter is a combustible gases leakage detector, which is used to detect the leakage of combustible gases quickly and reliably. Convenient for users to safely detect and test a variety of combustible gases types, easyto meet different test needs. Two models are available, you can choose HT59 or HT60 according to your needs, HT59 without display, HT60 with LCD display. Widely used, suitable for water heating device detection, gases pipeline detection, etc. Features: Portable gases detector, compact body, quick response, detect leaks quickly. Using quality gases-sensitive semiconductor sensors, high-precise and more accurate measurement. Convenient for users to safely detect and test a variety of combustible gases types, easyto meet different test needs. Measurable gases types(partial list): acetone, Acetylene, alcohol, ammonia, benzene, butane, ethanol, oxirane, gasoline, hexane, hydrogen, methane, naphtha, natural gases, paint thinners, propane, solvents. Two-color backlight prompt, no leakage display green screen, with leakage display red screen. Sound and light dual prompts, when detecting combustible gases sink leakage, the meter beeps and the concentration simulation bar increases. Two models are available, you can choose HT59 or HT60 according to your needs, HT59 without display, HT60 with LCD display. HT60 is Knob-type battery cover design, HT59 is push-lock battery cover design, easy to replace the battery, battery built-in design makes the use more secure. Widely used, suitable for water heating device detection, gases pipeline detection, etc. Specifications: Name: Combustible Gases Detector Material: plastics Battery: 2 * 1.5V AAA Alkaline Battery (not included) Display: HT59 concentration bar indicator; HT60 LCD disply Test ranges: 50-1000ppm Detecting gases: combustible gases Accuracy: ≤10% (methane) Sensitivity: <50ppm(methane) Response time: <2 sec Warm-Up time: Approx. 30 sec Alarm mode: visible and audible Auto power off: Yes Low battery indication: Yes Test Gases (partial list): acetone, Acetylene, alcohol, ammonia, benzene, butane, ethanol, oxirane, gasoline, hexane, hydrogen, methane, naphtha, natural gases, paint thinners, propane, solvents, etc.. Reactions time: ≤500PPM: Approx. 5sec; >500PPM: Approx. 2sec Operating conditions: 0 to 50 / 20%RH to 80%RH Storage conditions: -10 to 60 / 20%RH to 80%RH Item size: HT59: 155 * 28 * 23mm / 6.10 * 1.10 * 0.91in HT60: 166 * 28 * 23mm / 6.54 * 1.10 * 0.91in Item weight: 36g / 1.27ounce Package size: HT59: 160 * 44 * 28mm / 6.30 * 1.73 * 1.10in HT60: 171 * 44 * 28mm / 6.73 * 1.73 * 1.10in Package weight: 77g / 2.72ounce Packing List: 1 * Combustible Gases Detector 1 * Guideline