AUTOOL LM120+ Digital Refrigerant Gauges Hvac Gauges

(53 customer reviews)

US$149.00

Secure checkoutFast supportBulk ready
AUTOOL LM120+

Product Overview

The 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 Range
10MPaOverload Limit
4 × AAPower Supply
3 YearsWarranty Support
AUTOOL LM120+ digital refrigerant manifold gauge for HVAC and refrigeration service Click to enlarge
AUTOOL LM120+ 3-year warranty digital manifold gauge image Click to enlarge
Before You Order And Use

Before You Order And Use

LM120+ is used on pressurized refrigeration systems. Confirm the system pressure, hose rating, clamp accessory requirements, and working environment before connecting the gauge.

Confirm Rated Pressure

The digital manifold pressure tester measures gauge pressure. Do not use it if the tested equipment exceeds the instrument range.

Instrument Range

Pressure testing ranges from -101kPa to 6MPa, equivalent to -0.1bar to 60bar. The instrument limit pressure is 10MPa, or 100bar.

Standard Hose Limit

The 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 Hoses

If the packed hoses do not match the pressure requirement, use suitable replacement hoses for testing instead of forcing the standard hose.

Temperature Clamps Required

Dual temperature measurement requires compatible clamp-on temperature probes. The original product text notes that the test clip is required and not included.

Prepare AA Batteries

The gauge uses 4 × 1.5V AA/LR6 batteries. Prepare batteries separately if your shipment does not include them.

Operating Environment

  • Do 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 Features

Key Features

LM120+ 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 Testing

Measures high-side and low-side gauge pressure at the same time for refrigeration system installation, testing, and maintenance.

Vacuum And Leak Test Modes

Supports relative vacuum measurement, pressure leak measurement, and leak time recording for service checks within the rated range.

Temperature Measurement Ready

Displays real-time T1 and T2 temperature readings when compatible clamp-on temperature probes are connected and properly attached to pipes.

Built-In Refrigerant Database

The built-in refrigerant database helps reference pressure and evaporation temperature data and supports superheat and subcooling calculations when probes are connected.

Multi-Unit Switching

Switch pressure units between kPa, MPa, bar, inHg, and PSI, and switch temperature display between Celsius and Fahrenheit.

Backlit Digital Display

The large LCD with backlight improves visibility and makes data easier to read during workshop or field maintenance.

Industrial-Grade Interface

The long-life valve switch and 1/4-inch standard interface improve durability and service versatility.

Durable Handheld Body

High-strength engineering plastic and flexible non-slip silicone help make the gauge solid, comfortable, and easy to hold.

3-Year Warranty Support

AUTOOL provides 3-year support for eligible non-human damage cases, with support for setup, accessories, and troubleshooting.

Applications

Applications

Use 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 Service

Suitable for installation, testing, pressure inspection, and maintenance of air conditioning systems within the rated pressure range.

Cold Storage Maintenance

Supports service checks for cold storage and refrigeration equipment when system pressure and hose requirements are confirmed.

Refrigerant Filling Assistance

Helps monitor high-side and low-side pressure data during refrigerant filling procedures according to the system-specific requirements.

Pressure Leak And Vacuum Checks

Supports vacuum operation and pressure leak testing, including initial pressure, instant pressure, pressure difference, and leak test duration display.

How To Use

How To Use

The 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 Inspection

Turn 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 Operation

Switch 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 Test

With 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 / Subcooling

When 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 Notes

  • Do 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.
Specifications

AUTOOL LM120+ Product Specifications

The 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 Vacuum
Pressure Measurement TypeGauge pressure
Pressure Test UnitskPa, MPa, bar, inHg, PSI
Pressure Test Range0kPa-6000kPa
Pressure Test Resolution1kPa
Pressure Test Accuracy±0.5% FS + 5dgt
Pressure Overload Limit10000kPa, 10MPa, 100bar
Vacuum Test TypeRelative vacuum
Vacuum Test UnitskPa, MPa, bar, inHg, PSI
Vacuum Test Range-101kPa-0kPa
Vacuum Test Resolution1kPa
Temperature Measurement
Temperature Test Units°C and °F
Temperature Test Range-40°C to 150°C, -40°F to 302°F
Temperature Test Accuracy±0.5°C + 2dgt, ±0.9°F + 2dgt
Temperature Test Resolution0.1°C from -40°C to 99.9°C; 1°C from 100°C to 150°C
Temperature Clamp RequirementCompatible clamp-on temperature probes required for real-time T1 / T2 display
Body And Power
Power Supply4 × 1.5V AA / LR6 batteries
Dimensions170 × 110 × 50mm
Instrument Weight950g
Interface1/4-inch standard interface
Body MaterialHigh-strength engineering plastic with non-slip silicone
Refrigerant And Function Data
Built-In Refrigerant Database89 refrigerants according to the LM120 / LM120+ manual; the comparison chart may vary by product version or batch
Refrigerant FunctionsRefrigerant selection, pressure-evaporation temperature reference, superheat and subcooling calculation when probes are connected
DisplayLarge LCD with backlight
Warranty Support3-year support for eligible non-human damage cases
Pressure And Vacuum
Pressure TypeGauge pressure
Pressure Range0kPa-6000kPa
Overload Limit10000kPa / 10MPa / 100bar
Vacuum Range-101kPa-0kPa
UnitskPa / MPa / bar / inHg / PSI
Temperature And Power
Temperature Range-40°C to 150°C
Temperature Units°C / °F
Power Supply4 × 1.5V AA / LR6 batteries
Dimensions170 × 110 × 50mm
Weight950g
Product Comparison

Product Comparison

Compare 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.
AUTOOL air conditioning system tester comparison chart for LM70 LM100 LM120 LM120+ LM130 LM150 and LM160 Click to enlarge
Related Products

Related Products

Compare related AUTOOL digital refrigerant manifold gauges before choosing the right pressure range, refrigerant database, temperature clamp support, control mode, and budget.

Manual And Downloads

Manual And Downloads

Download the official LM120 / LM120+ manual for cautions, specifications, product structure, refrigerant filling, vacuum operation, pressure leak testing, common problems, maintenance, and warranty information.

AUTOOL LM120 / LM120+ Manual PDF preview Click to enlarge

AUTOOL LM120 / LM120+ Manual PDF

Use 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 Manual

Need 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.

Questions And Answers

These answers cover pressure range, hose limits, temperature clamps, batteries, refrigerant database, service modes, model differences, safety notes, manual download, and warranty support.

Warranty And Contact

Warranty And Contact

For 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 Support

Use 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 cases
  • Pressure range and hose pressure suitability confirmation
  • Temperature clamp / probe accessory confirmation
  • Refrigerant database version and supported refrigerant questions
  • LM120 vs LM120+ vs LM150 vs LM160 model selection
  • Manual, vacuum operation, pressure leak test, and refrigerant filling guidance
  • Packing list and accessory confirmation before shipment

Customer Reviews

  1. 4.89
    (53 customer reviews)
    98% of customers recommend this product.
    5 Stars91%4 Stars8%3 Stars2%2 Stars0%1 Star0%
  2. Esta Reinger

    Product arrived well packaged and in perfect condition!
    The shipment was fast no taxes here in Brazil?
    However not the multi-shipping bag in the original image Description Otherwise, the experience was perfect!

    0 of 0 found this review helpful
  3. Walmart Customer

    I used it test my Hvac system

    0 of 0 found this review helpful
  4. Wilmer Cassin

    Everything’s fine! It works correctly, I am very satisfied!

    0 of 0 found this review helpful
  5. Damien Langosh

    super quality! I recommend the seller! Came quickly!

    0 of 0 found this review helpful
  6. Ike Flatley

    Excellent quality! Fast Shipping! Very decent packed!

    0 of 0 found this review helpful
  7. Coleman McDermott

    The device looks solid. Through 8 days lasting.

    0 of 0 found this review helpful
  8. Jacey Leannon

    Delivery in 6 days by courier. Everything is on top, the goods are of high quality for their price category. Everything works, the taps do not hang out.

    0 of 0 found this review helpful
  9. Antonina Rice

    Great device, fast delivery. 5 days to Ufa

    0 of 0 found this review helpful
  10. Joesph Kohler

    Very fast shipping, everything perfect congratulations

    0 of 0 found this review helpful
  11. Dora Fahey

    The handlebar is of good quality, fast delivery.
    It is perfect.

    0 of 0 found this review helpful
  12. JOSE MANUEL HERNANDEZ

    Amazing tool.

    0 of 0 found this review helpful
  13. Bruce E Miller

    Meter is great but temperature clamps are junk , used them again to check unit and temp clamps broke just sitting in the bag

    0 of 0 found this review helpful
  14. Bob

    Was given as a gift to our son and no complaints so far uses it in his refrigeration business. Thank you.

    0 of 0 found this review helpful
  15. James

    Arrived fast!!!11 days, all this as described, thank you!!!

    0 of 0 found this review helpful
  16. Gerald

    Good thing everything works seller packed qualitatively thank you very much seller recommend

    0 of 0 found this review helpful
  17. James

    Arrived fast!!!11 days, all this as described, thank you!!!

    0 of 0 found this review helpful
  18. Gerald

    Good thing everything works seller packed qualitatively thank you very much seller recommend

    0 of 0 found this review helpful
  19. Mariela Cruz

    Excellent quality and precision of the manometer and the gas database is very good.
    excellent quality and precision of the manometer and the gas database is very good.

    0 of 0 found this review helpful
  20. ZETTA HARDWARE

    The manifold is easy to use, but the carry case is not included, which made user difficult to carry. A carry case would be a superb option.

    0 of 0 found this review helpful
  21. Kazi Vicaruddin

    I use this for charging and checking super heat and subcool. My testo meter temp sensors failed just cause of the location it¡¯s on the sides. I ended up buying these and it¡¯s sensor connections are on top so less likely to get messed up. Use it now for every call for a couple months no issues yet.

    0 of 0 found this review helpful
  22. Kazi Vicaruddin

    I use this for charging and checking super heat and subcool. My testo meter temp sensors failed just cause of the location it¡¯s on the sides. I ended up buying these and it¡¯s sensor connections are on top so less likely to get messed up. Use it now for every call for a couple months no issues yet.

    0 of 0 found this review helpful
  23. Andrzej Podgrudny (verified owner)

    Towar ok wszystko w porz?dku , przyda? by si? bardziej dok?adny opis funkcji LM120

    0 of 0 found this review helpful
  24. Jean Pierre Herrera Espinoza

    excellent team

    0 of 0 found this review helpful
  25. Jean Pierre Herrera Espinoza (verified owner)

    excelente equipo

    0 of 0 found this review helpful
  26. Derby

    like it very much

    0 of 0 found this review helpful
  27. Norman

    Perfect

    0 of 0 found this review helpful
  28. Christian Flatley

    Very satisfied

    0 of 0 found this review helpful
  29. James Freitus

    AUTOOL LM120+ Air Conditioning Manifold Digital Vacuum Gauge for Refrigeration HVAC Vacuum Pressure Temperature Tester

    0 of 0 found this review helpful
  30. James Freitus (verified owner)

    AUTOOL LM120+ Air Conditioning Manifold Digital Vacuum Gauge for Refrigeration HVAC Vacuum Pressure Temperature Tester

    0 of 0 found this review helpful
  31. James Freitus (verified owner)

    AUTOOL LM120+ Air Conditioning Manifold Digital Vacuum Gauge for Refrigeration HVAC Vacuum Pressure Temperature Tester

    0 of 0 found this review helpful
  32. Earl Mante

    The package is complete

    0 of 0 found this review helpful
  33. Earl Mante

    everything looks fine

    0 of 0 found this review helpful
  34. Frederic

    I have carried out several checks on R134A circuits and the operation is OK.
    I also reloaded several times and again without fail.
    The device is very easy to operate and accurate.
    To all those who hesitate and take the step well, you will not regret it.
    The delivery time is ok and the packaging too.
    Cheer.

    0 of 0 found this review helpful
  35. Jamil Grant

    Good qulity.

    0 of 0 found this review helpful
  36. Kenny McMillin

    Accurate.

    0 of 0 found this review helpful
  37. Ike Flatley

    Good packing

    0 of 0 found this review helpful
  38. MATT SALMON (verified owner)

    THE PACKAGE WAS MISSING PIECES

    0 of 0 found this review helpful
  39. Bulah Blanda

    I recommend AUTOOL

    0 of 0 found this review helpful
  40. Michael Kopp (verified owner)

    Einwandfreies Ger?t.??

    0 of 0 found this review helpful
  41. Allene Gleichner

    qualitatively

    0 of 0 found this review helpful
  42. Weldon O’Conner

    Works correctly.

    0 of 0 found this review helpful
  43. Arely Morar

    Really surprised

    0 of 0 found this review helpful
  44. Antonina Rice

    good

    0 of 0 found this review helpful
  45. Abel Littel

    great product

    0 of 0 found this review helpful
  46. Berniece Kovacek

    Great

    0 of 0 found this review helpful
  47. Paul

    I am very satisfied

    0 of 0 found this review helpful
  48. santos rivera (verified owner)

    AUTOOL LM120+ Air Conditioning Manifold Digital Vacuum Gauge for Refrigeration HVAC Vacuum Pressure Temperature Tester

    0 of 0 found this review helpful
  49. Kayden Senger

    Looks very good

    0 of 0 found this review helpful
  50. wendel

    Great! I would repurchase AUTOOL for more stuff, good quality!

    0 of 0 found this review helpful
  51. T&C

    This is a very good product that I would recommend to anyone.
    The unit is very easy to use and accurate.
    The delivery time and packaging was excellent.

    0 of 0 found this review helpful
  52. Renata Wyat(t)

    Give your freedom of thermostats and tapes around the pipes to check for super heat and sub cooling, it¡¯s just great .recommend 100%
    2 people found this helpful

    0 of 0 found this review helpful
  53. Vivian Archibald

    These gauges work great they are pretty accurate and will recommend to others great value thank you

    0 of 0 found this review helpful
  54. Zero Haggai

    It’s decent . You can recalibrate and zero out the pressure but you could have pressure in your lines still. Temperature sensors are good but would work better if the clamps had a copper insert for the sensor that covered the surface area of the hoses toy clamp to. I’m gonna make some new clamps with my 3d printer and add space for thermal conducting material in the clamp so the sensor gets a more accurate reading. But still it’s decent for the cost.

    0 of 0 found this review helpful
Leave A Review

Your email address will not be published. Required fields are marked *

LM120+ Refrigerant Gauges Digital Hvac Gauges
AUTOOL LM120+ Digital Refrigerant Gauges Hvac Gauges

US$149.00

Add to cart This product has multiple variants. The options may be chosen on the product page