AUTOOL Refrigeration Digital Gauges Compared

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 suitable fit for your needs and understand how the different gauge functions relate to vacuuming, refrigerant charging, leak testing, and compressor diagnosis.

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 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.

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.

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.

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.

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.