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AUTOOL LM55 Temp Clamp Hvac Temp Clamp
US$45.00
Key Features
- 40mm Clamp Fit
- High Accuracy
- History Storage
- 40mm Clamp Fit: The large clamp is described to fit pipes up to 40mm in diameter for HVAC pipe temperature checks.
- High Accuracy: Quoted accuracy of ±0.3C helps buyers judge temperature changes with more confidence.
- History Storage: Eight stored data sets help compare recent readings without writing every value down immediately.
- 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 LM55
Product Overview
The AUTOOL LM55 is a pipe clamp temperature meter designed for HVAC, refrigeration, and automotive A/C pipe temperature measurement. It helps technicians check pipe temperature in real time, view temperature waveform changes, browse historical records, and measure suitable pipes under 40mm diameter without complicated setup.
Pipe Temp Clamp <40mm Pipe Diameter Real-Time Reading Waveform History
0.96″Color Screen
8 SetsHistory Records
150sPer Record
3 YearsMain Unit Warranty
Click to enlarge
Click to enlargeBefore You Order And Use
Before You Order And Use
Before using the LM55 HVAC temperature clamp, confirm the pipe diameter, temperature condition, battery setup, and safe storage environment.
Avoid High-Temperature Adding Points
Do not place the clamp on high-temperature adding points or unsafe heating positions. For routine product-page use, keep pipe testing below 150°C.
Check Pipe Diameter First
LM55 is suitable for pipes under 40mm diameter. Do not force the clamp onto oversized or irregular surfaces.
Use 3 × AAA Batteries
The device uses a 4.5V power supply from three AAA batteries. Install batteries correctly before powering on.
Keep The Clamp Surface Stable
For more consistent readings, clamp the sensor firmly on a clean pipe surface and avoid loose contact during measurement.
Protect The Housing
Avoid rubbing the product against rough surfaces. Regularly check tightened and connected parts to maintain safe operation.
Store In A Dry Place
When not in use, store the LM55 in a dry place. Do not store it in hot, humid, or non-ventilated environments.
Key Features
Key Features
LM55 combines a large pipe clamp, real-time temperature display, waveform recording, historical data browsing, adjustable screen settings, and compact two-button operation for pipe temperature service work.
Large Clamp Design
The clamp is designed for pipe temperature measurement and supports applicable pipe diameters under 40mm.
Real-Time Temperature Reading
Live numerical display mode shows current temperature data directly, helping technicians read pipe temperature quickly.
Temperature Waveform Display
The waveform mode shows temperature changes over time, making it easier to observe heating or cooling trends.
History Data Viewing
The LM55 can store 8 sets of waveform data. Each set records up to 150 seconds and can be browsed later.
Adjustable Brightness
Backlight brightness can be adjusted from 0 to 100, helping the screen remain readable in different service environments.
High-Definition Color Screen
The 0.96-inch TFT-LCD color screen with 80 RGB × 160 dots resolution displays temperature, waveform, setup, and record information.
℃ / ℉ Unit Switching
Temperature units can be switched between Celsius and Fahrenheit in the setup interface.
Chinese / English Language
The system supports Chinese and English language options for different users and service environments.
Warranty Support
AUTOOL provides a 3-year warranty for the main unit and a 1-year warranty for included accessories under eligible warranty conditions.
Click to enlargeSpecifications
AUTOOL LM55 Product Specifications
The LM55 digital temp clamp uses a 4.5V AAA battery power supply, a 0.96-inch TFT-LCD screen, two-button control, and waveform data storage for pipe temperature measurement.
| Core Specifications | |
| Product | AUTOOL LM55 Digital Temp Clamp / Pipe Clamp Temperature Meter |
| Application | HVAC, refrigeration, and automotive A/C pipe temperature checks |
| Recommended Product-Page Testing Limit | Below 150°C; do not clamp high-temperature adding points |
| Manual Measurement Range | -50°C to 260°C listed in the user manual |
| Applicable Measurement Diameter | <40mm |
| Rated Operating Voltage | 4.5V, 3 × AAA batteries |
| Operating Current | <30mA |
| Standby Power Consumption | <500uA |
| Display | 0.96-inch TFT-LCD with backlight |
| Screen Resolution | 80 RGB × 160 dots |
| Buttons | Toggle button and Enter button |
| Casing Material | PA6-GF45 |
| Button Material | Silicone gel |
| Hardware Parts Material | Stainless steel and copper |
| Product Dimensions | 178 × 100mm |
| Outer Box Dimensions | 123 × 54 × 215mm |
| Display And Data Functions | |
| Live Numerical Display | Displays current temperature data in numerical form in real time |
| Waveform Display | Displays a temperature/time curve for real-time variation tracking |
| History Records | 8 sets of waveform data |
| Record Duration | 150 seconds per waveform set |
| Temperature Units | ℃ / ℉ switchable |
| Brightness | 0-100 adjustable display brightness |
| Languages | Chinese and English |
| Standby Behavior | Enters standby after no user activity or after 8 waveform sets have been collected for more than 5 minutes |
| Reminder | Buzzer sounds for 15 seconds after 8 waveform data sets are completed |
| Warranty | |
| Main Unit Warranty | 3 years from receipt date under eligible warranty conditions |
| Included Accessories Warranty | 1 year from receipt date under eligible warranty conditions |
Core Specifications
ProductAUTOOL LM55 Digital Temp Clamp
ApplicationHVAC / refrigeration / automotive A/C pipe temperature checks
Recommended LimitBelow 150°C; avoid high-temperature adding points
Manual Range-50°C to 260°C
Pipe Diameter<40mm
Power4.5V, 3 × AAA batteries
Display0.96-inch TFT-LCD, 80 RGB × 160 dots
Records8 sets, 150 seconds per set
Units℃ / ℉ switchable
Warranty3 years main unit, 1 year accessories
Applications
Applications
Use LM55 for suitable pipe temperature checks in HVAC, refrigeration, and automotive air-conditioning service. Keep the clamp within its pipe diameter and safe temperature limits.
HVAC Pipe Temperature Checks
Suitable for checking pipe temperature during heating, ventilation, and air-conditioning maintenance work.
Automotive A/C Service
Helps monitor line temperature during automotive air-conditioning inspection and diagnosis.
Refrigeration Maintenance
Useful for observing temperature changes on suitable refrigeration and cooling system pipes.
How To Use
How To Use
LM55 uses two buttons for power, confirmation, switching, waveform viewing, unit settings, brightness adjustment, and language setup.
Install Batteries
Install 3 × AAA batteries. Long-press the Enter button for 2 seconds to power on the device.
Clamp The Pipe
Clamp a suitable pipe under 40mm diameter. Avoid high-temperature adding points and unstable contact surfaces.
Read Live Temperature
Use the Test icon to enter live numerical display mode and view the current pipe temperature.
View Waveform And Records
Use Wave mode to view real-time temperature/time curves and browse historical waveform records.
Adjust Settings
Use Setup to switch ℃ / ℉, adjust brightness, and select Chinese or English language.
Use Notes
- Do not force the clamp onto pipes larger than 40mm.
- Do not use the clamp on high-temperature adding points.
- For routine customer-facing use, keep pipe testing below 150°C.
- Pressing Enter can pause and resume real-time waveform recording.
- After 8 waveform records are completed, the device stops storing and reminds the user with a beep.
Manual And Downloads
Manual And Downloads
Download the LM55 user manual for specifications, function descriptions, operation instructions, button descriptions, display descriptions, maintenance, warranty, and return service information.
Click to enlargeAUTOOL LM55 User Manual
Open the PDF manual to check LM55 setup, buttons, temperature display modes, waveform recording, language settings, brightness settings, maintenance, and warranty details.
Download ManualNeed Confirmation Before Ordering?
Contact AUTOOL Store if you need help confirming pipe diameter, temperature range, battery setup, HVAC usage, automotive A/C application, warranty, or related tool selection.
Related Products
Related Products
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Questions And Answers
These answers cover LM55 pipe temperature measurement, pipe diameter, safe temperature use, waveform records, batteries, screen settings, warranty, and support.
AUTOOL LM55 is a digital pipe clamp temperature meter for HVAC, refrigeration, and automotive A/C pipe temperature checks. It helps measure pipe temperature, observe real-time temperature changes, and review historical waveform records.
LM55 is suitable for pipes under 40mm diameter. Do not force the clamp onto oversized pipes or irregular surfaces, because unstable contact can affect measurement reliability.
No. Do not clamp high-temperature adding points or unsafe heating positions. For routine product-page use, keep pipe testing below 150°C unless the application has been confirmed by support.
The user manual lists an instrument measurement range of -50°C to 260°C, while the original page also includes a warm-tip limit for product use. To avoid unsafe use, this Description highlights the practical customer-facing warning: do not clamp high-temperature adding points and keep routine testing below 150°C.
Yes. LM55 can display a real-time temperature/time waveform and store 8 sets of waveform data. Each set records up to 150 seconds, and historical waveform records can be browsed later.
LM55 uses a 4.5V power supply from 3 × AAA batteries. Install the batteries correctly before powering on the device.
Yes. LM55 supports ℃ and ℉ unit switching. Enter the setup interface, select the unit option, choose the desired unit, and save the setting.
Yes. The LM55 screen brightness can be adjusted from 0 to 100 in the setup interface. This helps improve readability in different workshop environments.
Yes. The AUTOOL LM55 user manual is available as a PDF download in the Manual section of this Description. It includes specifications, function descriptions, operation instructions, button descriptions, display descriptions, maintenance, warranty, and return service information.
From the date of receipt, AUTOOL provides a 3-year warranty for the main unit and a 1-year warranty for included accessories under eligible warranty conditions. Warranty handling depends on the actual breakdown situation and warranty terms.
Keep the product away from rough surfaces, regularly check tightened and connected parts, avoid corrosive liquids, and store it in a dry place. Do not store it in hot, humid, or non-ventilated environments.
The Quick Search section lists LM55 and related AUTOOL HVAC or A/C service tools, including LM120, LM120+, LM150, and LM160. These products are related service tools, not direct LM55 function variants.
Warranty And Contact
Warranty And Contact
For LM55 pipe diameter confirmation, temperature range questions, HVAC or automotive A/C usage, manual help, warranty support, or related LM-series tool selection, contact AUTOOL Store directly.
Pre-Sales And Product Support
Use support if you need help confirming whether LM55 is suitable for your pipe size, temperature condition, refrigeration service task, automotive A/C application, or related HVAC measuring tool selection.
- Pipe diameter and temperature condition confirmation
- HVAC, refrigeration, and automotive A/C use explanation
- Manual download and operation guidance
- Battery setup, brightness, unit, and language setting help
- Warranty support for eligible cases
- Related LM55 / LM120 / LM120+ / LM150 / LM160 product selection
Customer Reviews
Leave A Review
JP (verified owner) –
easy to use
This works great for a quick check of the inlet and outlet temperatures of AC units. It is more accurate than the gauge type with a clip on the side, and is quick reading.
Bernie Boswell (verified owner) –
GOOD
Muy práctico y hace bien su trabajo está bueno soy técnico y garantizó
Angelos Platis (verified owner) –
The product matches the description.
The product matches the description. A discount was applied, making the price affordable. Shipping was fast. The product works well and is accurate. Excellent!