AUTOOL LM120 AC Manifold Gauge Refrigerant Identifier

AUTOOL LM120Product OverviewThe AUTOOL LM120 AC Manifold Gauge is a professional digital manifold gauge for installing, testing, and maintaining refrigeration systems such as automotive A/C systems, air conditioners, and cold storage equipment. It combines dual pressure testing, dual temperature testing, vacuum measurement, pressure leak testing, refrigerant filling support, multi-unit conversion, and a built-in refrigerant database in a compact handheld body.Dual Pressure Test Dual Temperature Test Vacuum Mode Pressure Leak Test Refrigerant Filling 3-Year Main Unit Warranty0-6000kPaPressure Range-101-0kPaVacuum Range-40-150°CTemperature Range4 × AABattery Power Click to enlarge Click to enlargeBefore You Order And UseBefore You Order And UseCheck pressure range, hose rating, tested equipment rating, operating environment, and personal protection before using the LM120 digital HVAC manifold gauge.Gauge Pressure MeasurementLM120 measures gauge pressure. Its pressure testing range is -101kPa to 6MPa (-0.1bar to 60bar), and the instrument limit pressure is 10MPa (100bar).Check Equipment Rated PressureConfirm the rated pressure of the tested equipment before testing. Do not use the instrument if the required pressure exceeds the instrument range.Hose Pressure LimitThe standard hose maximum operating pressure is 600 PSI, about 4.13MPa / 41.3bar, with a limit pressure of 3000 PSI, about 20.68MPa / 206.8bar.Use Suitable Replacement HosesIf the packed hoses do not match the pressure requirement, use suitable replacement hoses before testing. Confirm accessory and hose configuration before ordering if needed.Wear ProtectionWear qualified protective equipment during testing, especially when working with refrigerants, pressure systems, or possible toxic gases.Use In Ventilated AreasUse the instrument in a well-ventilated environment to reduce the risk of inhaling toxic gases during refrigeration system work.Safety ReminderDo not use or store the instrument in high temperature, high humidity, flammable, explosive, or strong electromagnetic field environments.Do not modify the internal circuit, because it may damage the instrument or create danger.Check pipe fittings, hoses, and valve stems before leak testing. Replace damaged parts immediately.During refrigerant filling, follow the specific operation requirements of the equipment and refrigerant to avoid damage to the user or equipment.Do not remove the high-pressure valve connection until the pressure drops to a safe point.Key FeaturesKey FeaturesLM120 is designed for stable digital A/C and refrigeration system service with high-strength materials, backlit data display, multi-mode testing, refrigerant data support, and practical field operation.Dual Pressure And Temperature TestingMeasure high-side and low-side pressure while supporting dual temperature measurement, helping technicians read refrigeration system operating data more clearly.Multiple Test ModesSupports pressure inspection, refrigerant filling assistance, vacuum operation, pressure leak testing, pressure unit conversion, and °C / °F temperature conversion.Backlit Digital DisplayThe large LCD screen with backlight presents data clearly and makes button operation easier in daily A/C maintenance environments.Built-In Refrigerant DatabaseThe built-in 32-bit digital processing unit and refrigerant database support direct reading of operating data and calculation of superheat and subcooling when required accessories are connected.Industrial-Grade DesignHigh-strength engineering plastic, flexible non-slip silicone grip, long-life valve switches, and 1/4-inch standard interface improve durability and versatility.Warranty And SupportAUTOOL provides 3-year warranty support for the main unit and 1-year warranty support for included accessories under eligible conditions.SpecificationsLM120 Product SpecificationsReview the core pressure, vacuum, temperature, refrigerant database, size, and power specifications before selecting the LM120 digital manifold gauge.Pressure And VacuumPressure TestGauge pressurePressure Test UnitkPa / MPa / bar / inHg / PSIPressure Test Range0-6000kPaPressure Test Resolution1kPaPressure Test Accuracy±0.5% FS 5dgtPressure Overload Limit10000kPa / 10MPa / 100barVacuum TestRelative vacuumVacuum Test UnitkPa / MPa / bar / inHg / PSIVacuum Test Range-101kPa to 0kPaVacuum Test Resolution1kPaTemperature And RefrigerantTemperature Test Unit°C / °FTemperature Test Range-40°C to 150°C / -40°F to 302°FTemperature Test Accuracy±0.5°C 2dgt / ±0.9°F 2dgtTemperature Test Resolution0.1°C from -40°C to 99.9°C; 1°C from 100°C to 150°CRefrigerant DatabaseBuilt-in 89 kinds of refrigerant NIST data according to American NIST standardSupported CalculationSuperheat and subcooling calculation when tested refrigerant and temperature probes are properly setPower And StructureProcessor32-bit digital processing unitPower Supply4 × 1.5V AA / LR6 batteriesInterface1/4-inch standard interfaceDimensions170 × 110 × 50mmMain Unit Weight950g Click to enlarge Pressure And VacuumPressure TestGauge pressurePressure Test UnitkPa / MPa / bar / inHg / PSIPressure Test Range0-6000kPaPressure Test Resolution1kPaPressure Test Accuracy±0.5% FS 5dgtPressure Overload Limit10000kPa / 10MPa / 100barVacuum TestRelative vacuumVacuum Test UnitkPa / MPa / bar / inHg / PSIVacuum Test Range-101kPa to 0kPaVacuum Test Resolution1kPa Temperature And RefrigerantTemperature Test Unit°C / °FTemperature Test Range-40°C to 150°C / -40°F to 302°FTemperature Test Accuracy±0.5°C 2dgt / ±0.9°F 2dgtTemperature Test Resolution0.1°C from -40°C to 99.9°C; 1°C from 100°C to 150°CRefrigerant DatabaseBuilt-in 89 kinds of refrigerant NIST data according to American NIST standardSupported CalculationSuperheat and subcooling calculation when tested refrigerant and temperature probes are properly set Power And StructureProcessor32-bit digital processing unitPower Supply4 × 1.5V AA / LR6 batteriesInterface1/4-inch standard interfaceDimensions170 × 110 × 50mmMain Unit Weight950g How To UseHow To UseLM120 is built for A/C and refrigeration system service. Use the correct mode, accessory setup, refrigerant selection, and safety procedure for each test.Refrigerant Filling And Pressure InspectionSelect the tested refrigerant, choose the display unit, zero the pressure display if needed, connect according to refrigerant flow direction, and operate high-side and low-side valves according to the system procedure.Vacuum OperationSwitch to vacuum test status, connect the system correctly, open the valves, start the vacuum pump, and close the valves before shutting down the vacuum pump after operation.Pressure Leak TestSwitch to pressure leak test mode and press Run / Stop to start. The display records the initial pressure, instantaneous pressure, pressure difference ΔP, and test duration.Superheat And SubcoolingWhen the refrigerant is preset and clamp-on temperature probes are properly connected, LM120 can display related temperature data and calculate superheat and subcooling.Use NotesTurn off the blue and red valves before powering on or switching work status.Press R / R- to select refrigerant type, Unit to switch pressure units, and °C/°F to switch temperature units.If the high and low pressure display shows residual digits after power-on, long press Zero until the display returns to zero.Pay attention to refrigerant flow direction during connection.Clamp-on temperature probe availability may depend on the selected package or model version. Confirm accessories before ordering.Product ComparisonProduct ComparisonCompare LM120 with related AUTOOL air conditioning system testers before choosing refrigerant modes, hose accessories, temperature clamps, pressure units, and program control functions.LM120 FocusSupports vacuuming mode, refrigerant mode, and pressure leak test with high and low pressure valves, pressure unit conversion, and °C / °F temperature units.LM120 UpgradeAdds trichromatic tube and two wired temperature clamps according to the comparison chart, while keeping the main LM120 digital manifold workflow.LM150 DirectionA higher-positioned digital manifold pressure tester option with trichromatic tube and two wired temperature clamps in the comparison chart.LM160 DirectionThe higher-end option with program control system, two-side handrails, 8 languages, and a wider high-level feature set.Decision CheckCompare refrigerant species, pressure units, vacuum units, temperature units, trichromatic tube, wired temperature clamps, and whether program control is needed. Click to enlargeRelated ProductsRelated ProductsUse these related price cards to compare LM120, LM120 , LM150, and LM160 before choosing the right digital manifold gauge for your A/C service work.Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Smart Digital Manifold GaugeAUTOOL LM120 AC Manifold Gauge Refrigerant IdentifierRated 0 out of 5(0) From US$98.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Smart Digital Manifold GaugeAUTOOL LM120 Digital Refrigerant Gauges Hvac GaugesRated 0 out of 5(0) From US$149.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Smart Digital Manifold GaugeAUTOOL LM150 Digital Manifold Gauges Digital AC GaugesRated 0 out of 5(0) From US$159.00 Select options This product has multiple variants. The options may be chosen on the product page Select options This product has multiple variants. The options may be chosen on the product page Add to wishlist Add to compare Quick view iconQuick view Smart Digital Manifold GaugeAUTOOL LM160 Refrigerant Leak Detector Digital Manifold GaugesRated 0 out of 5(0) From US$209.00 Select options This product has multiple variants. The options may be chosen on the product page Manual And DownloadsManual And DownloadsDownload the LM120 manual for cautions, product structure, refrigerant filling, pressure inspection, vacuum operation, pressure leak testing, common problems, maintenance, and warranty information. Click to enlargeAUTOOL LM120 Manual PDFOpen the PDF manual for LM120 and LM120 operation guidance, safety cautions, specifications, test modes, and maintenance notes. Download ManualNeed Setup Confirmation?Contact AUTOOL Store before ordering if you need to confirm refrigerant compatibility, pressure range, hose pressure rating, battery requirements, LM120 vs LM120 selection, or included accessories.Email[email protected] WhatsApp 86 189 2647 7404Questions And AnswersThese answers cover LM120 pressure range, hose rating, refrigerant database, test modes, batteries, accessories, refrigerant filling, leak testing, maintenance, and warranty. What Is AUTOOL LM120 Used For? AUTOOL LM120 is a digital manifold gauge used as an auxiliary instrument for installing, testing, and maintaining refrigeration equipment such as automotive A/C systems, air conditioners, and cold storage systems. It supports dual pressure testing, dual temperature testing, vacuum measurement, pressure leak testing, refrigerant filling assistance, and multi-unit conversion. Does LM120 Measure Gauge Pressure Or Absolute Pressure? LM120 measures gauge pressure. Gauge pressure starts from atmospheric pressure, while absolute pressure starts from absolute vacuum. Confirm the tested system requirement before using the instrument. What Is The LM120 Pressure Range And Limit? The LM120 pressure testing range is -101kPa to 6MPa (-0.1bar to 60bar), and the instrument limit pressure is 10MPa (100bar). Do not use the instrument if the tested equipment exceeds the instrument range. What Is The Standard Hose Pressure Rating? The standard hose maximum operating pressure is 600 PSI, about 4.13MPa / 41.3bar. The hose limit pressure is 3000 PSI, about 20.68MPa / 206.8bar. If the packed hose does not match your pressure requirement, use a suitable replacement hose. How Many Refrigerants Does LM120 Support? The LM120 manual lists a built-in database of 89 refrigerants based on American NIST standard data. Some comparison materials may show different refrigerant counts by version, so confirm the current model version if the exact database count is critical for your use. Can LM120 Calculate Superheat And Subcooling? Yes. LM120 can calculate superheat and subcooling when the tested refrigerant is preset and the clamp-on temperature probes are properly connected. Probe availability may depend on the selected package or model version, so confirm accessories before ordering. What Batteries Does LM120 Use? LM120 uses 4 × 1.5V AA / LR6 batteries. Replace the batteries when the low battery sign appears to avoid affecting normal use. Batteries may not be included, depending on shipping and package configuration. What Should I Check Before Pressure Leak Testing? Check pipe fittings, hoses, and valve stems before testing. If any damage is found, replace the part immediately to avoid improper use or accidents. During leak testing, LM120 records initial pressure, instantaneous pressure, pressure difference ΔP, and test duration. What May Cause Refrigerant Filling Failure? Refrigerant filling failure may be related to hose connection direction, system pipe or connector issues, or air remaining in the hose. The middle refrigerant inlet has a valve-core port used to vent air after connecting refrigerant to the instrument. Tighten the copper plug screw before or after each operation and check the refrigeration system pipes and connectors. What Is The Difference Between LM120 And LM120 ? LM120 is the core digital manifold gauge model for vacuuming mode, refrigerant mode, and pressure leak testing. LM120 keeps the main LM120 workflow and adds trichromatic tube and two wired temperature clamps according to the comparison chart. Choose based on whether you need the added accessory configuration. How Should I Maintain And Store LM120? Keep the instrument dry and avoid hot, humid, or non-ventilated storage. Check tightened and connected parts regularly, treat parts that contact chemical media with anti-corrosion care when needed, avoid corrosive liquids, and do not overload the instrument. How Long Is The Warranty? AUTOOL provides a 3-year warranty for the main unit from the date of receipt, and the included accessories are covered by a 1-year warranty under eligible conditions. For accessory confirmation, warranty support, or troubleshooting, contact AUTOOL Store support.Warranty And ContactWarranty And ContactFor LM120 setup, refrigerant selection, hose pressure confirmation, LM120 vs LM120 comparison, accessory confirmation, packing list confirmation, warranty service, or troubleshooting, contact AUTOOL Store directly.Pre-Sales And After-Sales SupportUse support if you need help confirming the correct digital manifold gauge model, pressure range, hose configuration, refrigerant database, accessories, battery requirements, or safe operation before testing.LM120 / LM120 / LM150 / LM160 model selectionPressure range and hose pressure rating confirmationRefrigerant compatibility and database confirmationAccessory, clamp, hose, and package confirmationVacuum, pressure leak test, and refrigerant filling setup guidance3-year main unit warranty and 1-year accessory warranty support under eligible conditionsEmail Support[email protected] WhatsApp Support 86 189 2647 7404