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AUTOOL LM150 Digital Manifold Gauges Digital AC Gauges
US$159.00
Key Features
- Dual Pressure Test
- Refrigerant Database
- Backlit LCD
- Dual Pressure Test: Measures refrigerant pressure on both sides for HVAC service.
- Refrigerant Database: Built-in refrigerant data supports faster setup and calculation.
- Backlit LCD: The clear display helps readings stay visible in the shop.
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AUTOOL LM150
Product Overview
The AUTOOL LM150 digital manifold gauge is designed for HVAC installation, refrigeration maintenance, and automotive A/C service. It supports dual pressure testing, dual temperature testing, digital readouts, multi-unit conversion, refrigerant filling and measurement, system evacuation, pressure leak testing, and a built-in 93-refrigerant database in a durable anti-slip body with a 3.5-inch backlit LCD and 1/4-inch standard interfaces.
Dual Pressure Test Dual Temperature Test 93 Refrigerants Vacuum & Leak Test
-101kPa-6MPaPressure Test Range
10MPaOverload Limit
4×AAPower Supply
3 YearsWarranty Support
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Click to enlargeBefore You Order And Use
Before You Order And Use
Check the instrument range, hose pressure rating, tested equipment rating, working environment, and personal protection requirements before connecting the LM150 digital manifold pressure tester.
Gauge Pressure Reading
Pressure measured by the LM150 digital manifold pressure tester is gauge pressure. Confirm the pressure type required by the system before interpreting readings.
Instrument Test Range
The pressure test range is -101kPa to 6MPa, equal to about -0.1bar to 60bar. Do not use it beyond the measuring range of the instrument.
Maximum Pressure Limit
The instrument maximum pressure / overload limit is 10MPa, equal to 100bar. This limit is not the same as the normal working range.
Standard Hose Limit
The standard hose maximum working pressure is 600PSI, approximately 4.13MPa / 41.3bar. The hose burst pressure is 3000PSI, approximately 20.68MPa / 206.8bar.
Check The Tested Device
Check the rated pressure of the equipment under test before connecting. If the included hose does not meet your pressure requirement, use a suitable replacement hose for testing.
Work Safely
Wear approved protective equipment and use the LM150 in a well-ventilated environment to help avoid exposure to toxic gases during refrigerant service.
Safety And Storage Notes
- Do not use or store the device in high temperature, high humidity, flammable, explosive, or strong electromagnetic field environments.
- Do not modify the internal circuit. Unauthorized modification may damage the instrument or create hazards.
- Inspect pipe fittings, hoses, hose terminals, and valve stems before testing. Replace damaged parts before use.
- 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. Follow the refrigeration system service requirements before charging.
Key Features
Key Features
LM150 combines refrigerant system service, high/low pressure and temperature readings, vacuum and leak testing, multi-unit display, two wired temperature clamps, and durable field-use hardware.
Multi-Mode A/C Service
Supports refrigerant filling and measurement, refrigerant system evacuation, pressure leak testing, vacuum pressure measurement, vacuum percentage measurement, leakage pressure measurement, and leakage time record.
HP / LP Data Display
Measures high-pressure and low-pressure line pressure, high-pressure and low-pressure line temperature, evaporation temperature, and condensation temperature for clearer service decisions.
93 Refrigerant Database
The built-in NIST-standard refrigerant database supports 93 refrigerants and helps display refrigerant-related operating data directly during service.
3.5-Inch Backlit LCD
The large backlit LCD helps users read pressure, temperature, mode, refrigerant, and test data clearly, including in darker working environments.
V-Shaped Ball Valve Control
The V-shaped ball valve opening design makes high and low pressure valve control easier, more direct, and more durable than ordinary knob-style valve operation.
IP54 Anti-Slip Housing
The body uses high-strength engineering plastics and flexible anti-slip silicone. The shell is IP54-rated and designed for stable handling in workshop use.
Two Wired Temperature Clamps
The kit includes two wired clip-on temperature probes for real-time evaporation and condensation temperature measurement on refrigeration pipes.
Multi-Unit Conversion
Supports pressure unit switching among kPa, MPa, bar, inHg, and psi, plus temperature switching between °C and °F.
Durable Interface Design
Long-life valve switches, refrigerant observation window, pressure release valve, and 1/4-inch standard interfaces improve daily service usability.
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Click to enlargeSpecifications
LM150 Product Specifications
Review the pressure range, vacuum range, temperature range, accuracy, battery type, size, weight, and interface information before using LM150 on refrigeration or A/C systems.
| Product And Application | |
| Product | AUTOOL LM150 Digital Manifold Pressure Tester |
| Application | HVAC installation, refrigeration equipment testing, refrigeration equipment maintenance, automotive A/C service, air conditioners, and cold storage systems |
| Pressure Type | Gauge pressure |
| Interface | 1/4-inch standard interface design |
| Pressure And Vacuum | |
| Pressure Test Unit | kPa, MPa, bar, inHg, psi |
| Pressure Test Range | 0kPa-6000kPa / 0-6MPa |
| Pressure Test Resolution | 1kPa |
| Pressure Test Accuracy | ±0.5% FS + 5dgt |
| Pressure Overload Limit | 10000kPa / 10MPa / 100bar |
| Vacuum Test Type | Relative vacuum |
| Vacuum Test Unit | kPa, MPa, bar, inHg, psi |
| Vacuum Test Range | -101kPa-0kPa |
| Vacuum Test Resolution | 1kPa |
| Standard Hose Working Pressure | 600PSI / approx. 4.13MPa / 41.3bar |
| Standard hose burst pressure | 3000PSI / approx. 20.68MPa / 206.8bar |
| Temperature And Refrigerants | |
| Temperature Test Unit | °C, °F |
| Temperature Test Range | -40°C to 150°C / -40°F to 302°F |
| Temperature Test Resolution | 0.1°C / 0.1°F from -40 to 99.9; 1°C / 1°F from 100 to upper range |
| Temperature Test Accuracy | ±0.5°C + 2dgt / ±0.9°F + 2dgt |
| Refrigerant Database | Built-in 93 refrigerants according to NIST standard |
| Temperature Probes | Two wired clamp-on temperature probes included |
| Hardware | |
| Display | 3.5-inch backlit LCD |
| Housing | High-strength engineering plastic body with flexible anti-slip silicone and IP54-rated shell |
| Power Supply | 4 × 1.5V AA / LR6 batteries |
| Dimension | 240 × 145 × 50mm |
| Weight | 950g |
| Warranty Support | 3-year support for eligible non-human damage cases; lifetime maintenance support |
Click to enlargeCore Specifications
Pressure TypeGauge pressure
Pressure Range0kPa-6000kPa / 0-6MPa
Vacuum Range-101kPa-0kPa
Overload Limit10MPa / 100bar
Hose Working Pressure600PSI / approx. 4.13MPa
Temperature Range-40°C to 150°C / -40°F to 302°F
Refrigerants93 refrigerants
Power Supply4 × 1.5V AA / LR6 batteries
Dimension240 × 145 × 50mm
Weight950g
How To Use
How To Use
LM150 supports refrigerant filling and pressure inspection, vacuum operation, and pressure leak testing. Use the manual and the specific refrigeration system procedure before service.
Refrigerant Filling & Pressure Inspection
Turn off the blue and red valves, power on the instrument, select pressure test status, connect according to the system direction, vent air through the pressure release valve, then fill through the correct valve according to system conditions.
Vacuum Operation
Turn off the blue and red valves, power on the instrument, switch to vacuum test mode, select the reading unit, zero the pressure display if needed, connect the system, then run the vacuum pump and close valves after vacuuming.
Pressure Leak Test
With the blue and red valves turned off, power on the instrument and switch to pressure leak test mode. The display records initial pressure, instant pressure, ΔP pressure difference, and test time.
Temperature Probe Reading
Connect the wired clamp-on probes to the T1 and T2 sockets and make sure they fully contact the refrigeration pipes. The LCD can display real-time temperature data when probes are connected.
Use Notes
- When the instrument is turned on, if the high and low pressure display area shows non-zero digits, press and hold the Zero button until it returns to zero.
- For refrigerant filling, do not remove the high-pressure valve connection until the pressure drops to a safe point.
- The filling operation of different equipment or refrigerants may vary. Read the specific service requirements to avoid user injury or equipment damage.
- The manual describes SH / SC display when the tested refrigerant is preset and clamp-on probes are connected. If subcooling / superheat is a required workflow, confirm model suitability before ordering.
Product Comparison
Product Comparison
Compare LM150 with LM70, LM100, LM120, LM120+, LM130, and LM160 before choosing the right refrigerant database, pressure valve, temperature clamp, visible window, program control, pressure unit, and vacuum unit.
LM150 FocusLM150 supports vacuuming mode, refrigerant mode, pressure leak testing, trichromatic tube, two wired temperature clamps, foldable hook, refrigerant visible window, 93 refrigerants, high/low pressure valves, and kPa / MPa / bar / inHg / psi units.
Compared With LM120 / LM120+LM120 and LM120+ list 92 refrigerants. LM150 lists 93 refrigerants and adds the two wired temperature clamp configuration shown in the comparison chart.
Compared With LM160LM160 is the higher-end smart option with program control system, 8 languages, 95 refrigerants, and two-side handrails. Choose LM160 if program control is required.
Decision CheckBefore ordering, compare refrigerant database size, temperature clamp requirement, pressure and vacuum units, visible window, valve type, handrail design, and program control needs.
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Click to enlargeWhat Is In The Box
What Is In The Box
The packing list image shows the LM150 main unit and included accessories. Packing List uses only one most relevant package image to keep the Description compact and clear.
Main UnitAUTOOL LM150 digital manifold pressure tester
Storage CaseHard carrying case shown in the package image
HosesRed, blue, and yellow hoses shown in the package image
AdaptersSmall adapters and brass connector shown in the package image
Temperature ClampsTwo wired clip-on temperature probe clamps
DocumentationUser manual and retail box
Related Products
Related Products
Compare related AUTOOL digital manifold gauge models before choosing the right refrigerant database, temperature clamp support, program control, and workshop service capability.
- Select options This product has multiple variants. The options may be chosen on the product page
AUTOOL LM120 AC Manifold Gauge Refrigerant Identifier
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AUTOOL LM120+ Digital Refrigerant Gauges Hvac Gauges
From US$149.00 - Select options This product has multiple variants. The options may be chosen on the product page
AUTOOL LM150 Digital Manifold Gauges Digital AC Gauges
From US$159.00 - Select options This product has multiple variants. The options may be chosen on the product page
AUTOOL LM160 Refrigerant Leak Detector Digital Manifold Gauges
From US$209.00
Manual And Downloads
Manual And Downloads
Download the LM150 manual for pressure range warnings, refrigerant filling, pressure inspection, vacuum operation, pressure leak testing, common problems, maintenance, and warranty information.
Click to enlargeAUTOOL LM150 User Manual
Open the PDF manual for setup, specifications, operation modes, troubleshooting, and safe-use instructions.
Download ManualNeed Pressure Or Compatibility Confirmation?
Contact AUTOOL Store before ordering if you need to confirm pressure range, standard hose working pressure, refrigerant compatibility, interface requirements, replacement hoses, package contents, or model selection.
Questions And Answers
These answers cover LM150 use cases, pressure range, hose limits, refrigerant database, battery, temperature clamps, model differences, safety checks, and common troubleshooting items.
LM150 is a digital manifold pressure tester for HVAC installation, refrigeration equipment testing and maintenance, automotive A/C service, air conditioners, and cold storage systems. It supports dual pressure testing, dual temperature testing, refrigerant service, vacuum measurement, and pressure leak testing.
The LM150 pressure reading is gauge pressure. Confirm whether the system procedure requires gauge pressure or another pressure reference before interpreting test data.
The overall pressure and vacuum coverage is -101kPa to 6MPa, approximately -0.1bar to 60bar. The pressure test range is 0kPa to 6000kPa, and the vacuum test range is -101kPa to 0kPa. Do not use it beyond the measuring range of the instrument.
The maximum working pressure of the standard hose is 600PSI, approximately 4.13MPa / 41.3bar. The hose burst pressure is 3000PSI, approximately 20.68MPa / 206.8bar. If the included hose does not meet your pressure requirement, use a suitable replacement hose.
LM150 includes a built-in 93-refrigerant NIST-standard database. The refrigerant image and comparison chart should be checked if you need a specific refrigerant confirmed before ordering.
LM150 uses 4 × 1.5V AA / LR6 batteries. If the low-power sign appears, replace the batteries as required to avoid affecting normal use.
Yes. The LM150 packing list image shows two wired clip-on temperature probe clamps. Connect them to the T1 and T2 sockets and make sure they fully contact the refrigeration pipes for real-time temperature readings.
Check the rated pressure of the tested equipment, confirm that the system does not exceed the instrument range, inspect pipe fittings and hoses, replace damaged parts immediately, wear approved protective equipment, and work in a well-ventilated area.
The refrigeration system inlet has a valve core. When connecting hoses, pay attention to both hose terminals: connect the terminal with a core to the refrigeration system and the terminal without a core to the instrument.
Check hose terminals, nylon pads, pipe fittings, hoses, valve stems, and refrigeration system pipes and connectors. Hose terminal nylon pads have a limited service life, and overuse or damage may cause leakage. Tighten the copper plug screw on the middle refrigerant inlet before or after operation as required.
LM150 supports vacuuming mode, refrigerant mode, pressure leak testing, 93 refrigerants, high/low pressure valves, two wired temperature clamps, foldable hook, and refrigerant visible window. LM160 is the higher-end smart model with program control system, 8 languages, 95 refrigerants, and two-side handrails. Choose LM160 if program control is required.
AUTOOL provides 3-year warranty support for eligible non-human damage cases and lifetime maintenance support. Contact support for accessory confirmation, troubleshooting, replacement parts, and model selection questions.
Warranty And Contact
Warranty And Contact
For LM150 pressure range confirmation, hose pressure limits, refrigerant database questions, A/C service setup, package contents, manual support, troubleshooting, accessories, or model selection, contact AUTOOL Store directly.
Pre-Sales And Product Support
Use support if you need help confirming LM150 pressure range, standard hose limits, refrigerant compatibility, refrigerant filling workflow, vacuum operation, pressure leak test setup, temperature clamp use, package contents, or comparison with LM120, LM120+, and LM160.
- 3-year warranty support for eligible non-human damage cases
- Lifetime maintenance support and accessory guidance
- Pressure range and hose pressure confirmation
- Refrigerant database and system compatibility confirmation
- Temperature clamp, hose, adapter, and package-content confirmation
- Low-battery, hose, valve stem, refrigerant filling, and leak-point troubleshooting
- LM120 / LM120+ / LM150 / LM160 model selection support
- Support replies as soon as possible, generally within 24 hours
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