Extech RH390 Precision Psychrometer with Humidity, Temperature, Dew Point and Wet Bulb – Dual Probe Digital Meter with High Accuracy, Fast Response, Large LCD Display

Extech RH390 Precision Psychrometer with Humidity, Temperature, Dew Point and Wet Bulb – Dual Probe Digital Meter with High Accuracy, Fast Response, Large LCD Display

• Professional Precision in Every Reading – Measures relative humidity, ambient temperature, dew point, and wet bulb with high accuracy, giving technicians confidence in every inspection or field test.
• Dual Probe Advantage for Versatility – Includes both built-in and external probes for simultaneous readings in multiple locations, making it ideal for HVAC diagnostics, laboratories, and building inspections.
• Fast Response Time That Saves You Work Hours – Designed with advanced sensors to deliver rapid, stable results in seconds so you spend less time waiting and more time troubleshooting and reporting.
• Clear Display for Smarter Decisions – Large backlit LCD shows multiple parameters at once, even in dim conditions, helping professionals quickly compare values without juggling separate devices.
• Rugged, Portable, and Ready for the Field – Compact handheld design with protective case ensures durability, while battery power and data hold functions make it convenient for on-site and outdoor use.

<b>Extech RH390 Precision Psychrometer; Fast Response Time (<30 Seconds); Dual Backlit Display; Simultaneous Display of: Humidity/Temperature, Humidity/Dew Point or Humidity/Wet Bulb</b> <p>Measure humidity and temperature simultaneously with the RH390 Precision Psychrometer from Extech. A dual-illuminated readout can be alternated to display wet bulb and humidity, or dew point and humidity, or temperature and humidity. This handheld device registers temperatures from -22 degrees to 199 degrees F (-30 degrees to 100 degrees C) and measures the full spectrum of relative humidity with ±2% accuracy between 20 and 90% RH. Complete with carrying case and 9V battery.</p></br> <b>Key Features</b></br><ul> <li>Fast response time (<30 seconds)</li> <li>Dual backlit display</li> <li>Simultaneous display of: Humidity/Temperature, Humidity/Dew Point or Humidity/Wet Bulb</li> <li>Slim design with rubberized sides for better grip and for one hand operation</li> <li>Data Hold and Min/Max functions</li> <li>Auto power off with disable and low battery indicator</li></ul></br> <b>Specifications</b></br><ul> <li>Humidity: 0 to 100%RH</li> <li>Temperature (Internal): -22 to 199°F (-30 to 100°C)</li> <li>Basic Accuracy: ±2%RH, ±1.8°F/1°C</li> <li>Max. Resolution: 0.1%RH, 0.1°F/°C</li> <li>Dewpoint: -22 to 199°F (-30 to 100°C)</li> <li>Wet Bulb: 32 to 176 °F (0 to 80°C)</li> <li>Dimensions: 7.8"x1.7"x1.3" (200x45x33mm)</li> <li>Weight: 7oz (200g)</li></ul>