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Carbon-removal equipment for injectors, intake valves, components, and workshop cleaning jobs.

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Accessories

Replacement parts, adapters, consumables, cables, and add-ons for major diagnostic and service equipment.

Alignment parts3D Wheel Aligner AccessoriesTargets, clamps, parts, and support items for alignment machines. Leak accessoriesSmoke Leak Detector AccessoriesAdapters, hoses, caps, and consumables for smoke testing. Camera partsAutomotive Inspection Camera AccessoriesCamera probes, hooks, mirrors, cables, and inspection attachments. Injector partsFuel Injector Cleaner & Tester AccessoriesAdapters, tubes, seals, and service parts for injector benches. Walnut partsWalnut Blasting Machine AccessoriesNozzles, hoses, adapters, and parts for walnut de-carbon cleaning. Dry ice partsDry Ice Blasting Machine AccessoriesNozzles, tubes, fittings, and support for dry ice blasting. A/C partsA/C Refrigerant Recovery & Recharge Machine AccessoriesHoses, couplers, filters, fittings, and service parts for A/C machines. Battery partsBattery Tester AccessoriesClamps, cables, adapters, and add-ons for battery testers.

AUTOOL LM130 Refrigeration Digital Gauges

Product Presentation, Uncategorized

AUTOOL Refrigeration Digital Gauges Compared

június 6, 2025

Refrigerant Gauge Guide

AUTOOL Refrigeration Digital Gauges Compared

Refrigerant gauges, also known as digital manifold gauges, are essential tools for air conditioning maintenance and refrigerant charging. AUTOOL’s LM series offers a full range, from entry-level tools to high-end models.

This article compares each model to help you find the best fit for your needs and understand how the different gauge functions relate to vacuuming, refrigerant charging, leak testing, and compressor diagnosis.

Tool Purpose

Why Do I Need a Refrigerant Pressure Gauge?

In car air conditioning repair, a refrigerant pressure gauge is a key tool that shows the pressure of the refrigerant. It helps spot and fix common refrigerant problems in time.

High and Low Pressure

Read the high-pressure and low-pressure sides in real time to check whether the system is operating normally.

Refrigerant Condition

Compare pressure and temperature to judge whether refrigerant is insufficient or excessive before and after refilling.

Vacuum and Filling

Connect the vacuum pump and refrigerant tank to monitor whether vacuuming and filling reach the correct standard.

Leak and Compressor Testing

Use the gauge for leak tests and compressor working checks when you need a more complete diagnosis.

Classification

Classification of Refrigerant Pressure Gauges

Refrigerant pressure gauges typically consist of two gauges: a high-pressure gauge and a low-pressure gauge. These are usually mounted on a combined gauge set and connected with red and blue hoses.

According to the display method, refrigerant gauges can be divided into mechanical refrigerant gauges and digital refrigerant gauges. AUTOOL LM series products are digital manifold gauges that offer more accurate readings, more complete functions, and easier operation.

Product Range

What Are the Differences Between the Various Refrigeration Digital Gauges at AUTOOL?

The table below keeps the original model grouping and shows how the LM series changes across vacuuming, refrigerant mode support, leak testing, compressor testing, connectivity, and control features.

Feature	Entry-Level LM100 / LM110	Mid-Level LM120 / LM120+ / LM130	High-End LM150 / LM160
Vacuum Function	Yes	Yes	Yes
Refrigerant Mode Support	LM100: No / LM110: Yes	Yes	Yes
Pressure Leak Test	Yes	Yes	Yes
Compressor Test	No	Yes, LM120+ and above	LM150: No / LM160: Yes
Bluetooth Connectivity	No	No	LM160 only
Programmable System Control	No	No	LM160 only
Three-Color Hose Design	No	No	LM160 only

Reading Guide

How to Interpret the Car Refrigeration Digital Gauges of AUTOOL

When using the refrigerant gauge, start the engine, turn the air conditioner on, set the controller to the coolest position, and let the engine reach normal operating temperature before testing.

According to the technical standard, the normal pressure range of an R134a air-conditioning system is 0.15 to 0.25 MPa on the low-pressure side and 1.37 to 1.57 MPa on the high-pressure side. For R12 systems, the normal range is 0.15 to 0.20 MPa on the low-pressure side and 1.45 to 1.50 MPa on the high-pressure side.

Use the table readings to judge whether the system is working normally and carry out maintenance in time if you find any abnormality.

New Product

Features of AUTOOL LM130 Refrigeration Digital Gauges

The AUTOOL LM130 is more than a refrigerant gauge. It combines accurate sensors, multiple test modes, a clear display, and an easy-to-use design to make refrigeration inspection more efficient, accurate, and safe.

AUTOOL LM130 refrigeration digital gauges front image — LM130 front view.

AUTOOL LM130 refrigeration digital gauges detail image — LM130 detail view.

High-Precision Detection

Supports temperature compensation and high-precision pressure sensing for stable measurement results.

Multiple Detection Modes

Includes cooling mode, vacuum mode, and pressure leak test mode for different service needs.

HD Digital Display

The 3-inch backlit LCD makes data easy to read during daytime outdoor work or night repairs.

Practical Design

Anti-slip frame, suspension hook, visible window, and practical button layout improve workshop usability.

Summary

Choose the LM Series Based on the Work You Actually Do

The LM series covers a wide range of A/C service needs, from basic gauge reading to higher-end leak and compressor diagnostics. If you need more control and data clarity, LM130 and LM160 sit in the stronger middle and high-end positions of the line.

Use the comparison table, the pressure-reading reference, and the feature cards above to choose the model that fits your daily service workload rather than choosing only by price.