AUTOOL LM120 Digital Refrigerant Gauges Hvac Gauges

AUTOOL LM120 Product OverviewThe AUTOOL LM120 is a digital refrigerant manifold gauge for air conditioner, refrigeration equipment, and cold storage installation, testing, and maintenance. It supports dual pressure testing, vacuum measurement, pressure leak testing, refrigerant filling assistance, multi-unit switching, and dual temperature measurement when compatible wired temperature clamps are connected.Dual Pressure Test Vacuum Measurement Pressure Leak Test Refrigerant Database-101kPa-6MPaPressure Range10MPaOverload Limit4 × AAPower Supply3 YearsWarranty Support Click to enlarge Click to enlargeBefore You Order And UseBefore You Order And UseLM120 is used on pressurized refrigeration systems. Confirm the system pressure, hose rating, clamp accessory requirements, and working environment before connecting the gauge.Confirm Rated PressureThe digital manifold pressure tester measures gauge pressure. Do not use it if the tested equipment exceeds the instrument range.Instrument RangePressure testing ranges from -101kPa to 6MPa, equivalent to -0.1bar to 60bar. The instrument limit pressure is 10MPa, or 100bar.Standard Hose LimitThe standard hose maximum operating pressure is 600PSI, about 4.13MPa or 41.3bar. Its limit pressure is 3000PSI, about 20.68MPa or 206.8bar.Use Suitable HosesIf the packed hoses do not match the pressure requirement, use suitable replacement hoses for testing instead of forcing the standard hose.Temperature Clamps RequiredDual temperature measurement requires compatible clamp-on temperature probes. The original product text notes that the test clip is required and not included.Prepare AA BatteriesThe gauge uses 4 × 1.5V AA/LR6 batteries. Prepare batteries separately if your shipment does not include them.Operating EnvironmentDo not use or store the instrument in high temperature, high humidity, flammable, explosive, or strong electromagnetic environments.Do not modify the internal circuit, to avoid instrument damage or safety hazards.Wear qualified protective equipment during testing.Use the instrument in a well-ventilated environment to reduce the risk of inhaling toxic gases.Check pipe fittings and hoses before pressure leak testing. Replace damaged parts before use.Key FeaturesKey FeaturesLM120 combines digital pressure testing, vacuum measurement, refrigerant data reference, pressure leak testing, and a durable handheld manifold body for HVAC and refrigeration service work.Dual Pressure TestingMeasures high-side and low-side gauge pressure at the same time for refrigeration system installation, testing, and maintenance.Vacuum And Leak Test ModesSupports relative vacuum measurement, pressure leak measurement, and leak time recording for service checks within the rated range.Temperature Measurement ReadyDisplays real-time T1 and T2 temperature readings when compatible clamp-on temperature probes are connected and properly attached to pipes.Built-In Refrigerant DatabaseThe built-in refrigerant database helps reference pressure and evaporation temperature data and supports superheat and subcooling calculations when probes are connected.Multi-Unit SwitchingSwitch pressure units between kPa, MPa, bar, inHg, and PSI, and switch temperature display between Celsius and Fahrenheit.Backlit Digital DisplayThe large LCD with backlight improves visibility and makes data easier to read during workshop or field maintenance.Industrial-Grade InterfaceThe long-life valve switch and 1/4-inch standard interface improve durability and service versatility.Durable Handheld BodyHigh-strength engineering plastic and flexible non-slip silicone help make the gauge solid, comfortable, and easy to hold.3-Year Warranty SupportAUTOOL provides 3-year support for eligible non-human damage cases, with support for setup, accessories, and troubleshooting.ApplicationsApplicationsUse LM120 as an auxiliary instrument for refrigeration equipment installation, testing, and maintenance. Always follow the operating requirements of the specific equipment and refrigerant.Air Conditioner ServiceSuitable for installation, testing, pressure inspection, and maintenance of air conditioning systems within the rated pressure range.Cold Storage MaintenanceSupports service checks for cold storage and refrigeration equipment when system pressure and hose requirements are confirmed.Refrigerant Filling AssistanceHelps monitor high-side and low-side pressure data during refrigerant filling procedures according to the system-specific requirements.Pressure Leak And Vacuum ChecksSupports vacuum operation and pressure leak testing, including initial pressure, instant pressure, pressure difference, and leak test duration display.How To UseHow To UseThe manual covers refrigerant filling and pressure inspection, vacuum operation, and pressure leak testing. The steps below summarize the user decision path without replacing the full manual.Refrigerant Filling And Pressure InspectionTurn off the blue and red valves, power on the gauge, select pressure test status, choose refrigerant and display units, zero the display if needed, then connect the gauge to the refrigeration system according to the flow direction.Vacuum OperationSwitch to vacuum test status, connect the system correctly, turn on the blue and red valves, start the vacuum pump, and close the valves before shutting the vacuum pump after operation.Pressure Leak TestWith both valves off and the instrument powered on, switch to pressure leak test mode. Press Run / Stop to start the test and monitor initial pressure, instant pressure, pressure difference, and elapsed test time.Temperature And Superheat / SubcoolingWhen the tested refrigerant is selected and clamp-on temperature probes are connected correctly, the gauge can display real-time temperature and calculate SH superheat and SC subcooling data.Use NotesDo not remove the high-pressure valve connection until the pressure drops to a safe point.Different equipment and refrigerants may require different filling procedures. Read the equipment-specific requirements before operation.Connected clamp-on temperature probes must contact refrigeration pipes fully for accurate temperature display.Inspect pipe fittings and hoses before pressure leak testing, and replace damaged parts immediately.SpecificationsAUTOOL LM120 Product SpecificationsThe LM120 digital manifold gauge is powered by 4 AA batteries and supports gauge pressure testing, relative vacuum testing, temperature measurement, pressure leak testing, and refrigerant database reference.Pressure And VacuumPressure Measurement TypeGauge pressurePressure Test UnitskPa, MPa, bar, inHg, PSIPressure Test Range0kPa-6000kPaPressure Test Resolution1kPaPressure Test Accuracy±0.5% FS 5dgtPressure Overload Limit10000kPa, 10MPa, 100barVacuum Test TypeRelative vacuumVacuum Test UnitskPa, MPa, bar, inHg, PSIVacuum Test Range-101kPa-0kPaVacuum Test Resolution1kPaTemperature MeasurementTemperature Test Units°C and °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°CTemperature Clamp RequirementCompatible clamp-on temperature probes required for real-time T1 / T2 displayBody And PowerPower Supply4 × 1.5V AA / LR6 batteriesDimensions170 × 110 × 50mmInstrument Weight950gInterface1/4-inch standard interfaceBody MaterialHigh-strength engineering plastic with non-slip siliconeRefrigerant And Function DataBuilt-In Refrigerant Database89 refrigerants according to the LM120 / LM120 manual; the comparison chart may vary by product version or batchRefrigerant FunctionsRefrigerant selection, pressure-evaporation temperature reference, superheat and subcooling calculation when probes are connectedDisplayLarge LCD with backlightWarranty Support3-year support for eligible non-human damage cases Pressure And VacuumPressure TypeGauge pressurePressure Range0kPa-6000kPaOverload Limit10000kPa / 10MPa / 100barVacuum Range-101kPa-0kPaUnitskPa / MPa / bar / inHg / PSI Temperature And PowerTemperature Range-40°C to 150°CTemperature Units°C / °FPower Supply4 × 1.5V AA / LR6 batteriesDimensions170 × 110 × 50mmWeight950g Product ComparisonProduct ComparisonCompare LM120 with LM70, LM100, LM120, LM130, LM150, and LM160 before choosing the right refrigerant mode, clamp support, visible window, valve type, and control function.LM120 FocusBalanced digital manifold gauge with vacuuming mode, refrigerant mode, pressure leak test, trichromatic tube, two wired temperature clamp support, foldable hook, visible refrigerant window, and high/low pressure valves.LM120 vs LM120 The comparison chart shows both support refrigerant mode and visible window, while LM120 adds trichromatic tube and two wired temperature clamp support.LM150LM150 is a more advanced digital manifold gauge option with trichromatic tube, two wired temperature clamp support, high/low pressure valves, and a higher refrigerant species count in the chart.LM160LM160 is the higher-end option in this chart, adding program control system, two-side handrails, more language options, and broader refrigerant database support.Decision CheckCompare refrigerant species, pressure units, vacuum units, temperature units, wired clamp support, visible window, valve type, and program control before ordering. Click to enlargeRelated ProductsRelated ProductsCompare related AUTOOL digital refrigerant manifold gauges before choosing the right pressure range, refrigerant database, temperature clamp support, control mode, and budget.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 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 LM70 Smart Digital ManifoldRated 0 out of 5(0) From US$139.00 Select options This product has multiple variants. The options may be chosen on the product page Manual And DownloadsManual And DownloadsDownload the official LM120 / LM120 manual for cautions, specifications, product structure, refrigerant filling, vacuum operation, pressure leak testing, common problems, maintenance, and warranty information. Click to enlargeAUTOOL LM120 / LM120 Manual PDFUse the manual before operating the gauge, especially when connecting to a refrigeration system, selecting refrigerant, using vacuum mode, or performing a pressure leak test. Download ManualNeed Setup Confirmation?Contact AUTOOL Store before ordering if you need to confirm hose pressure suitability, temperature clamp accessories, refrigerant database version, battery preparation, or LM120 model selection.Email[email protected] WhatsApp 86 189 2647 7404Questions And AnswersThese answers cover pressure range, hose limits, temperature clamps, batteries, refrigerant database, service modes, model differences, safety notes, manual download, and warranty support. What Is AUTOOL LM120 Used For? LM120 is an auxiliary digital refrigerant manifold gauge for installation, testing, and maintenance of refrigeration equipment such as air conditioners and cold storage systems. It supports dual pressure testing, vacuum measurement, pressure leak testing, refrigerant filling assistance, multi-unit switching, and refrigerant data reference. What Pressure Range Does LM120 Support? The instrument measures gauge pressure. The combined warning range is -101kPa to 6MPa, or -0.1bar to 60bar. The pressure test range is 0kPa-6000kPa, the vacuum test range is -101kPa-0kPa, and the instrument overload limit is 10MPa, or 100bar. What Is The Standard Hose Pressure Limit? The standard hose maximum operating pressure is 600PSI, approximately 4.13MPa or 41.3bar. The hose limit pressure is 3000PSI, approximately 20.68MPa or 206.8bar. Confirm the tested equipment pressure first, and use suitable replacement hoses if the packed hoses do not match the pressure requirement. Are The Temperature Clamps Included? The original product text says the temperature test clip is required and not included. LM120 supports dual temperature measurement when compatible clamp-on temperature probes are connected to the instrument and fully contacted with the refrigeration pipes. What Batteries Does LM120 Use? LM120 uses 4 × 1.5V AA / LR6 batteries. Prepare batteries separately if your order or shipping region does not include them. How Many Refrigerants Are Built Into LM120 ? The LM120 / LM120 manual lists a built-in 89-kind refrigerant NIST database. The comparison chart on the product page may show a different refrigerant species count by model or product version, so confirm the database version with support if this detail is critical for your work. Can LM120 Calculate Superheat And Subcooling? Yes, the gauge can calculate SH superheat and SC subcooling when the tested refrigerant is selected and compatible clamp-on temperature probes are connected correctly and fully contacted with the refrigeration pipes. What Is The Difference Between LM120 And LM120 ? According to the comparison chart, both LM120 and LM120 support vacuuming mode, refrigerant mode, pressure leak test, foldable hook, visible refrigerant window, and high/low pressure valves. LM120 additionally shows trichromatic tube support and two wired temperature clamp support. How Should I Choose Between LM120 , LM150, And LM160? Choose LM120 if you need a balanced digital manifold gauge with trichromatic tube, wired temperature clamp support, visible refrigerant window, and high/low valves. Consider LM150 if you want a more advanced gauge option shown with higher refrigerant species count in the chart. Consider LM160 if you need the higher-end model with program control system, two-side handrails, more language options, and broader database support. What Should I Check Before Pressure Leak Testing? Check pipe fittings and hoses before testing. If any damage is found, replace the damaged part immediately to avoid improper use or accidents. Also confirm that the equipment pressure is within the instrument range and that the hose rating is suitable. Where Can I Download The LM120 Manual? Use the Download section on this page to open the AUTOOL LM120 / LM120 manual PDF. The manual includes cautions, specifications, product structure, refrigerant filling, vacuum operation, pressure leak testing, common problems, maintenance, warranty, and return/exchange information. How Long Is The Warranty? AUTOOL provides 3-year warranty support for eligible non-human damage cases. Contact AUTOOL Store for setup, accessories, hose pressure confirmation, temperature clamp confirmation, troubleshooting, or model selection support.Warranty And ContactWarranty And ContactFor LM120 setup, pressure range confirmation, hose suitability, temperature clamp accessories, refrigerant database version, battery preparation, warranty, or model selection, contact AUTOOL Store directly.Pre-Sales And Product SupportUse support if you need help confirming whether LM120 is suitable for your HVAC or refrigeration system before ordering.3-year warranty support for eligible non-human damage casesPressure range and hose pressure suitability confirmationTemperature clamp / probe accessory confirmationRefrigerant database version and supported refrigerant questionsLM120 vs LM120 vs LM150 vs LM160 model selectionManual, vacuum operation, pressure leak test, and refrigerant filling guidancePacking list and accessory confirmation before shipmentEmail Support[email protected] WhatsApp Support 86 189 2647 7404