The pressure and temperature characteristics of different refrigerants vary greatly, especially with the widespread use of new environmentally friendly refrigerants such as R1234yf, R410A and R1234A. During the installation, maintenance, and debugging of air conditioning systems, technicians need to monitor key parameters such as evaporation-pressure temperature, condensation-pressure temperature, superheat, and subcooling to determine whether the system is cooling properly and if any potential faults exist. Traditional mechanical manifold gauges have limited functionality and show clear shortcomings in terms of accuracy, features, and ease of operation. Relying solely on pressure measurement makes it difficult to comprehensively assess the operating condition of modern refrigeration systems.
The AUTOOL LM70 is a smart digital manifold gauge specifically designed for automotive air conditioning systems. It offers high measurement accuracy with a resolution of 0.1 Psi and an error margin of ≤0.5% FS. Equipped with a dual-channel valve set and clamp-type temperature probes, it enables real-time monitoring of key parameters such as high- and low-pressure hose pressure, evaporation-pressure temperature, condensation-pressure temperature. The device automatically calculates superheat and subcooling, significantly enhancing the accuracy of refrigerant filling and system diagnostics. With 16 built-in refrigerant types, it flexibly adapts to a wide range of air conditioning maintenance tasks. In addition to basic pressure and temperature measurements, it also supports vacuuming, refrigerant filling, and pressure leak testing—providing comprehensive, one-stop support for the entire maintenance process of air conditioning systems.
Key Features and Functions:
High-Precision Measurement
The AUTOOL LM70 uses advanced digital sensors to deliver high measurement accuracy, with a resolution up to 0.1 Psi and an error margin of ≤0.5% FS. Within the specified measurement range, it can sensitively detect subtle pressure fluctuations in the refrigerant system, providing reliable data for the installation, maintenance, and debugging of air conditioning systems.
Dual-channel Real-time Pressure Monitoring
The AUTOOL LM70 features a dual-channel valve set design that allows simultaneous monitoring of pressures on both sides without repeatedly switching measurement ports. This enables quick identification of issues such as system blockages, refrigerant undercharge or overcharge, and expansion valve faults, thereby improving work efficiency.
Refrigerant Subcooling/Superheat
The AUTOOL LM70 automatically calculates the system’s subcooling and superheat based on the refrigerant’s evaporation and condensation temperatures and corresponding line conditions. This allows even novice technicians to easily grasp the key operating parameters of the refrigeration system.
Pressure Leak Testing
The AUTOOL LM70 pressure leakage measurement value can be accurate to 0.1Psi, which can keenly capture tiny leaks in the refrigeration system and accurately determine whether leak repair or component replacement is needed to avoid blind disassembly.
Vacuum Mode
The AUTOOL LM70 features a vacuum range of -1010 to 0 mBar and displays the vacuum level in real time during vacuuming. It enables clear monitoring of the removal progress and effectiveness of non-condensable gases and moisture in the refrigeration system, effectively preventing risks such as pipe corrosion and ice blockages caused by moisture residue, ensuring the system maintains optimal vacuum conditions.
Multiple Refrigerant Data
The AUTOOL LM70 supports a wide range of applications with built-in data for 16 mainstream refrigerants, including R1234yf, R410A and R1234A, enabling flexible adaptation to various air conditioning system maintenance tasks.
Multiple Unit Switching
The AUTOOL LM70 supports multiple unit conversions, allowing users to accurately read values immediately after switching to the desired unit without manual calculations. This significantly reduces operation time and improves testing efficiency and convenience.
Backlit Display
The AUTOOL LM70 features a high-brightness backlit display that ensures precise and clear readings, even in challenging lighting conditions such as bright outdoor sunlight or dimly lit workshops, making data easily visible at a glance.
Explosion-Proof Three-Color Refrigerant Charging Hoses
The AUTOOL LM70 three-color hoses are made of high-strength explosion-proof materials, capable of withstanding up to 800 Psi of working pressure and 3000 Psi of burst pressure, easily meeting the high-pressure testing demands of various air conditioning systems.
Multiple Application Scenarios
The AUTOOL LM70 offers multiple functions and design advantages, including automatic calculation of evaporation and condensation temperatures. It is widely applicable to automotive air conditioning systems, home air conditioners, and a variety of other refrigeration equipment.
Product Details
Specifications
The AUTOOL LM70 is a high-precision, wide-range, multi-purpose professional digital manifold gauge. Independently developed by AUTOOL, it has a number of intellectual property rights, as well as the authoritative certification of CE, FCC, ROHS and other testing organizations. Compared to traditional analog gauges, the LM70 features a high-definition LCD backlit display that directly shows pressure values in units such as MPa and bar, effectively reducing misjudgments caused by visual errors or vibrations. It helps technicians perform installation, maintenance, and debugging of refrigeration systems with greater efficiency and accuracy.