Watch Pipe Temperature Change as a Live Curve
Clamp the LM55 onto a pipe under 40 mm to read live temperature and follow heating or cooling on a real-time curve during HVAC, refrigeration and automotive A/C work. It reads temperature only, not pressure.
- Pipes Under 40 mm
- Live Temperature Curve
- 8 × 150 s Records
- Pause and Resume
- °C / °F
Key Features
-
Live Reading
Read the current pipe temperature once the clamp has stable contact.
-
Real-Time Waveform
Follow the direction and rate of change on a temperature/time curve.
-
Saved Records
Store and browse waveform sets for later comparison; recording stops with an alert when storage is full.
-
Pause and Resume
Press Enter to pause and resume a live recording.
-
Color Display
Shows live temperature, waveforms, saved records and settings, with adjustable backlight.
Model Comparison
| LM55 | LM70 | LM120+ | |
|---|---|---|---|
| Primary task | Single-pipe temperature trend | Dual-pressure manifold with two pipe temperatures | Manifold workflow with clamp support |
| Pressure measurement | No | Yes | Yes |
What’s in the Box
- LM55 pipe-clamp thermometer
- User manual
- Retail box
How to Use
- Choose the pipePick a clean, stable pipe under 40 mm and avoid unsafe high-temperature points.
- Power onInsert three AAA batteries correctly and hold Enter for about two seconds.
- Clamp with full contactSeat the sensor firmly without forcing the jaw onto an oversized or irregular surface.
- Read or recordRead the current value or monitor the curve, pausing and resuming as needed.
- CompareReview stored records taken under comparable conditions.
Specifications, operation, buttons, display and maintenance: LM55 user manual (PDF).
Good to Know
Caution
- Keep routine pipe measurements below 150°C; the wider instrument range is a specification, not a safe application limit.
- It cannot diagnose an A/C fault by itself; combine the trend with pressure, airflow and equipment data.
Care
- If a curve jumps, check clamp contact, pipe surface and movement before blaming the system.
- Store dry, away from heat, humidity, corrosive liquids and poorly ventilated places.
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