Hygrometer/psychrometer Flir Systems MR176, digital display 2.3", Li-Ion 3.7V, 72×42×140 mm

The FLIR MR176 is a portable hygrometer/psychrometer with an integrated thermal imaging capability for efficient moisture inspection and environmental measurements. The device combines a 2.3" QVGA color display, an 80x60 Lepton thermal imager with Infrared Guided Measurement (IGM) and a field-replaceable temperature/relative humidity sensor in a compact, rugged enclosure. It supports pinless and pin probe moisture detection, automatic environmental calculations (dew point, vapor pressure, mixing ratio) and stores images with measurement data for on-site diagnostics and documentation.

Advantages

IGM thermal imaging visually guides you to potential moisture zones so you can target measurements more quickly and accurately, while an integrated pinless sensor plus an external pin probe provide both non-invasive and invasive options. The field-replaceable temperature/relative humidity sensor and Progressive Environmental Stability Indicator improve measurement reliability across changing conditions. Long battery runtime, internal storage for images, and compatibility with FLIR Tools software simplify documentation and reporting.

Suitable for

• HVAC system inspections and maintenance
• Building moisture surveys and leak detection
• Indoor environmental monitoring in homes and commercial buildings
• Restoration, construction and facility diagnostics

Key specifications

• Display: 2.3" QVGA (320x240) TFT, 64k color
• Thermal imager: 80x60 Lepton detector, 51°x38° FOV, 9 Hz update rate
• Moisture measurement: pinless 0–100 relative; pin probe 7–30% (±1.5% MC) with material groups
• Environmental: relative humidity 0–100% (basic accuracy ±2.5%); air temperature 0–50°C (±0.6°C)
• Dew point range: -30–50°C; vapor pressure 0.0–12.0 kPa; mixing ratio 0.0–80.0 g/kg
• Internal memory: 4 GB, image capacity up to 9999 images, saved images in BMP with values overlaid
• Battery: rechargeable 3.7 V Li‑Ion (3000 mAh), microUSB charging, up to 18 h continuous runtime
• Durability: IP54 rating, 3 m drop tested; operating temperature 0–50°C
• Physical size: approximately 175 × 72 × 42 mm; weight ~323 g

How to use

Switch on the MR176 and allow the field-replaceable temperature/relative humidity sensor to stabilize for accurate environmental readings. Use the thermal imager and IGM display to scan surfaces and visually identify areas with temperature anomalies that may indicate moisture. Position the laser cross-hair on the point of interest and take pinless measurements for a quick assessment; use the supplied external pin probe for verification where intrusive measurement is required. Save images with overlaid measurements to internal memory and transfer files to a computer using the USB cable for reporting with FLIR Tools.

Usage recommendations

Allow the instrument to acclimate when moving between different environments to ensure the Progressive Environmental Stability Indicator reports steady-state readings. For concealed moisture, start with thermal scanning and non-intrusive pinless checks, then confirm with the pin probe on representative materials. Charge the battery before prolonged field use and store recorded images regularly to avoid exceeding internal memory limits.