AUTOOL LM150 Digital Manifold Gauge with 93-Refrigerant Database
US$159.00
- Dual Pressure + Included Clamps
- 93-Refrigerant Database
- Superheat & Subcooling
- Vacuum, Hold + Charge Modes
- Dual Pressure + Included Clamps: Read both pressure sides and two pipe temperatures; the kit includes two wired clip-on probes.
- 93-Refrigerant Database: Select from 93 built-in NIST-standard refrigerants to reference operating data during service.
- Superheat & Subcooling: Calculate SH/SC from the selected refrigerant, pressure readings, and stable T1/T2 measurements.
- Vacuum, Hold + Charge Modes: Supports relative-vacuum monitoring, timed pressure-retention testing, and refrigerant-charging assistance.
- Direct Ball-Valve Control: V-shaped high- and low-side ball valves provide direct flow-path control.
- Dual Pressure + Included Clamps: Read both pressure sides and two pipe temperatures; the kit includes two wired clip-on probes.
- 93-Refrigerant Database: Select from 93 built-in NIST-standard refrigerants to reference operating data during service.
- Superheat & Subcooling: Calculate SH/SC from the selected refrigerant, pressure readings, and stable T1/T2 measurements.
- Vacuum, Hold + Charge Modes: Supports relative-vacuum monitoring, timed pressure-retention testing, and refrigerant-charging assistance.
- Direct Ball-Valve Control: V-shaped high- and low-side ball valves provide direct flow-path control.
- 3-Year Warranty Main unit 3 years · Accessories 1 year
- 90-Day Returns Eligible returns within 90 days
- Official Store Genuine products · Direct support
AUTOOL LM150 · 93-Refrigerant AC Manifold Gauge with Dual Temperature
Read Pressure and Dual Temperatures Together
Measure 0–6 MPa high- and low-side pressure alongside two pipe temperatures using the included wired clamps. Select from 93 refrigerant profiles to calculate superheat/subcooling, then monitor relative vacuum or timed pressure retention. V-shaped ball valves, a sight window and 1/4-inch connections support charging, while the 3.5-inch backlit display and IP54 shell suit workshop handling.
- 0–6 MPa Gauge Pressure
- 93 Refrigerant Profiles
- 2 Included Temperature Clamps
- Superheat / Subcooling
- 3.5-Inch Backlit Display
Key Features
A 93-Refrigerant Library with Two Clamp Channels
Dual-Channel Gauge Pressure
Read high- and low-side pressure together within the stated range.
Two Wired Temperature Clamps
Use the two included wired T1/T2 clamp probes for live pipe-temperature readings during evaporation and condensation checks. Maintain full contact with the refrigeration pipes for stable measurements.
93-Refrigerant Database
Select the known refrigerant from the 93-profile NIST-standard database to view its operating data during service.
Superheat And Subcooling
Calculate SH/SC from the selected refrigerant, pressure readings and stable T1/T2 measurements.
Vacuum Monitoring
Follow relative vacuum during system evacuation.
Pressure-Retention Testing
Record initial pressure, current pressure, pressure difference and elapsed time during a retention check to assess system tightness. Vacuum-pressure and vacuum-percentage readings support evacuation monitoring, while refrigerant filling assistance supports the system-specific charging procedure.
Charging Assistance
Use valves, the refrigerant sight window and rated hoses during the approved system-specific charging sequence.
3.5-Inch Backlit 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. View pressure, temperature, selected refrigerant and test status together.
V-Shaped Ball Valves
Control the high- and low-side flow paths directly with the V-shaped ball-valve design during compatible service steps.
Portable Kit Hardware
Non-slip housing, foldable hook, standard connections, three-color hoses and hard case support transport and use.
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.
Durable Interface Design
Long-life valve switches, refrigerant observation window, pressure release valve, and 1/4-inch standard interfaces improve daily service usability.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
How to Use
Connect, Select, Stabilize, and Compare Both Lines
Identify The Refrigerant
Confirm the exact refrigerant and service information before selecting one of the 93 profiles.
Check Ratings And Hardware
Inspect valve stems, nylon seals, fittings and hoses; compare system/gauge/hose working limits.
Power, Zero And Connect
Install four AA batteries, close valves, zero residual display if needed and connect the correct hose ends.
Run The Selected Mode
Use live pressure/refrigerant, vacuum or retention mode; attach both clamps firmly for temperature and SH/SC.
Review And Disconnect Safely
Compare results with the service procedure, close valves, reduce high-side pressure to a safe point and disconnect in the prescribed order.
Safety & Compatibility
Verify Refrigerant, Couplers, Hoses, and Pressure
Gauge Pressure Only
Interpret LM150 readings as gauge pressure and stay within -101 kPa to 6 MPa measurement coverage.
Hose Rating Can Govern
Standard hoses are listed for 600 PSI working pressure; 3000 PSI is a burst value, not a service target.
Check Hose Ends And Seals
Incorrect core orientation or worn nylon pads can prevent filling or cause leakage.
Use PPE And Ventilation
Wear appropriate protection, ventilate the area and avoid hazardous heat, humidity, ignition and electromagnetic conditions.
Use Known Refrigerant Data
Select the known refrigerant before interpreting readings or charging.
Restricted Operating Environments
Do not use or store the device in high temperature, high humidity, flammable, explosive, or strong electromagnetic field environments.
No Circuit Modifications
Do not modify the internal circuit. Unauthorized modification may damage the instrument or create hazards.
Inspect Service Connections
Inspect pipe fittings, hoses, hose terminals, and valve stems before testing. Replace damaged parts before use.
Release Pressure Before Disconnecting
Do not remove the high-pressure valve connection until the pressure drops to a safe point.
Follow System Charging Procedures
Different equipment and refrigerants may require different filling procedures. Follow the refrigeration system service requirements before charging.
Maximum Device Pressure
The maximum device pressure / overload limit is 10 MPa / 100 bar. This is not the normal measuring range and does not permit exceeding the rated pressure of the tested system.
Test Results
Interpret Pressure, Temperature, SH, and SC
Read Pressure and Temperature Together
Interpret high- and low-side pressure together with T1/T2 temperature values, the known refrigerant, and operating condition.
SH/SC Validity
Requires correct refrigerant selection and stable full clamp contact.
Retention Change
Recheck hoses, pads, fittings and valve stems before moving to a separate leak-location procedure.
Post-Service Readings
Abnormal pressure or cooling can require additional electrical, mechanical, airflow or leak diagnosis.
Compare Models
Compare Refrigerant Libraries and Inputs
Model Guide
Choose one or more models. LM150 is selected by default.
| Choose For Your Task | LM120+ | LM150 | LM160 |
|---|---|---|---|
| Selection Criteria | |||
| Refrigerant profiles | Shared manual lists 89; confirm version | 93 | 95 |
| Program-controlled menu | No verified support | No verified support | Yes |
| Wired clamps in package | Compatible clamps not included in this configuration | Two shown | Two shown |
Manual & Downloads
Use the Manual for Setup and Service
AUTOOL LM150 User Manual
Open the PDF manual for LM150 pressure and temperature measurement, refrigerant selection, superheat and subcooling, vacuum and charging procedures, safety, and troubleshooting.
Package
What’s Included
- LM150 Main UnitDigital manifold pressure tester.
- Hard Storage CaseProtective carrying case.
- Three-Color Hose SetRed, blue and yellow service hoses; confirm rating for the application.
- Two Wired Temperature ClampsT1/T2 clip-on pipe probes.
- Adapters And Brass ConnectorSmall adapters/connector; confirm the exact selected-kit pieces.
- Manual And Retail BoxDocumentation and packaging.
FAQs
Refrigerant Library and Clamp Questions
What Is AUTOOL LM150 Used For?
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.
- High/low gauge pressure, relative vacuum and two pipe temperatures; it also supports timed retention and selected-refrigerant calculations.
How many refrigerants are stored?
LM150 lists 93 refrigerants in its NIST-standard reference database.
Are Temperature Clamps Included?
Yes. LM150 includes two wired clip-on temperature probes. Connect them to the T1 and T2 sockets with full pipe contact for real-time temperature readings.
Does LM150 identify refrigerant?
No. Select only refrigerant already confirmed from vehicle/equipment information.
Can it locate a leak?
No. Pressure change can flag a problem; use an approved separate method to locate it.
Why Might Refrigerant Filling Fail?
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-end valve-core orientation, then inspect seals, fittings and valves and follow the connection procedure.
What Is The Standard Hose Pressure Limit?
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.
- Use the lowest system, gauge and hose working rating. Do not treat the 100 bar instrument limit or 3000 PSI hose burst value as normal operation.
What powers it?
Four 1.5 V AA/LR6 batteries.
How does it differ from LM160?
LM150 provides the core 93-refrigerant dual-clamp manifold workflow; LM160 adds program control, eight languages and a 95-refrigerant database.
Is The Pressure Reading Gauge Pressure Or Absolute Pressure?
The LM150 pressure reading is gauge pressure. Confirm whether the system procedure requires gauge pressure or another pressure reference before interpreting test data.
What Is The LM150 Pressure Test Range?
The overall pressure and vacuum coverage is -101 kPa to 6 MPa, approximately -1.01 bar to 60 bar. The pressure test range is 0 kPa to 6000 kPa, and the vacuum test range is -101 kPa to 0 kPa. Do not use it beyond the measuring range of the instrument.
How Many Refrigerants Does LM150 Support?
LM150 includes a built-in 93-refrigerant NIST-standard database. Confirm that your required refrigerant is included before ordering.
What Power Supply Does LM150 Need?
LM150 uses 4 × 1.5V AA / LR6 batteries. If the low-power sign appears, replace the batteries as required to avoid affecting normal use.
What Should I Check Before Testing?
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.
What Are Common Leak Points To Check?
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.
What Is The Difference Between LM150 And LM160?
LM150 supports vacuuming mode, refrigerant mode, pressure leak testing, 93 refrigerants, high/low pressure valves, two wired temperature clamps, a foldable hook, and a refrigerant sight window. LM160 adds program control, 8 interface languages, a 95-refrigerant database, and two-side handrails; choose it when those functions are required.
How Long Is The Warranty?
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Ford Gladstone ✓ Verified Purchase –
Looks awesome it's going to be a while before I get around to using it
Looks awesome it’s going to be a while before I get around to using it
Victoria Leigh ✓ Verified Purchase –
good
Diese Monteurshilfe ist top. Sehr robust und nach neuestem Standart. Für mich die richtige Entscheidung.
Amy Dru ✓ Verified Purchase –
Very nice manifold set.
Pros:
1. LCD read out means no more bouncy gauges and guess work.
2. Takes 2 batteries – easy enough.
3. Materials are heavy duty and the unit appears very well made.
4. Reads low and high pressure side.
5. Worked with my vacuum pump and filling setup – required same adapters most require.
Cons:
1. Something this nice deserves a nice storage case to protect it – most people will just leave it hanging up though.