FLIR MR55 Pin Moisture Meter with Bluetooth – an accurate and reliable meter with wireless connectivity
The FLIR MR55 is an affordable pin-based meter for professionals in moisture remediation, pest control, home or building inspection, and floor installation. It is a high-quality, reliable, and easy-to-use moisture-measurement tool.
Wireless connectivity allows the user to view data on a mobile device from the FLIR Tools® Mobile app and thanks to a built-in library of 11 material groups, users can tune the meter to the
appropriate test material and improve measurement accuracy.
This library is easy to access on the FLIR.com website by scanning a QR code on the back of the meter with a mobile device.
The MR55 is a reliable standalone meter—or a useful accessory to pair with a FLIR thermal imager.

FLIR MR55 Pin Moisture Meter Key Features:
- Resistance-based pin moisture measurements for wood and other building materials including plywood, drywall, oriented strand board (OSB), brick, cement screed, concrete, cement mortar, anhydrite screed, lime mortar, and plaster
- Ambient Temperature and Relative Humidity measurements
- Test material group selectivity
- Bluetooth® data transmission
- Firmware upgrades via micro USB port located in battery compartment
- Work light
- Backlit LCD
- Self-test calibration verification (test points in protective cap)
- Replaceable electrode pins
- Data Hold
- Battery powered (2 x 5V ‘AA’ cells)
- Automatic Power OFF after 20 minutes
FLIR MR55 Pin Moisture Meter Calibration Verification Test:
With the FLIR MR55 switched ON and set to Group 1, touch the measurement pins to the test points labeled ‘T’ on the protective cap (test points ‘1’ in accompanying diagram). The display will read 18% (±2) if the test passes. Next, touch the measurement pins to the test points labeled ‘B’ on the protective cap (test points ‘2’ in the accompanying diagram). The display will read 26% (±2) if the test passes. Please return the MR55 for service if either self-test consistently fails.
FLIR MR55 Specifications:
| Measurements |
Moisture, relative humidity and ambient temperature |
| Moisture measurement type |
Electrical resistance |
| Display |
Backlit, multifunction LCD |
| Electrode length |
0.4” (10mm) |
| Electrode pins |
Integrated, replaceable |
| Work light |
White LED |
| Auto Power OFF (APO) |
After 20 minutes |
| Power supply |
Two (2) 1.5V ‘AA’ batteries (rear compartment) |
| Low battery indicator |
|
| Operating Temperature |
32 ~ 122°F (0 ~ 50°C) |
| Operating Humidity |
85% Relative Humidity maximum |
| Housing material |
Impact resistant plastic |
| Drop-proof |
2 metre |
| IP rating |
IP40 |
| Safety Compliance |
CE, RCM |
| Dimensions |
188 x 58 x 33mm |
| Weight |
160g battery excluded |
Measurements:
| Function |
Range |
Accuracy |
| Moisture in wood Group 1~9 |
7 ~ 29% |
± 2% MC* |
| 30 ~ 99% |
Reference Only |
| Moisture in building materials Group 10 and 11 |
1~99% (Group 10) |
|
| 1 ~ 35% (Group 11) |
Reference Only |
| Ambient Temperature |
32 ~ 122°F (0 ~ -50°C) |
± 2°F (± 1°C) |
| Ambient Relative Humidity |
0 ~ 10% |
± 4% |
| 10 ~ 85% |
± 2% |