Extech RH401 Triple Display Hygro Thermometer Psychrometer with Built in Infrared Thermometer

The RH401 is a Digital Psychrometer with a Built-in IR thermometer that allows quick non-contact surface temperature measurements. Displays air temperature, humidity and surface temperature or dew point, humidity and surface temperature or wet bulb, humidity and surface temperature on a triple LCD with backlighting. The meter calculates the temperature difference between IR surface temperature and dew point. Includes hard case and four AAA batteries.

• Triple display with backlighting
• Displays Air temp+RH+surface temp or Dew Point+RH+surface temp or Wet Bulb+RH+surface temp
• Built-in InfraRed Thermometer with laser pointer and 8:1 distance to target ratio
• Adjustable emissivity from 0.3 to 1.0
• Precision humidity capacitance sensor is retractable for protection during transportation and storage
• Calculates T1 (IR Surface Temperature) - DP (Dew Point) differential
• Programmable Auto power off and Low battery indication
• Over-range/under-range alert indicator
• Built-in RS-232 interface for capturing readings on a PC

• Humidity: Range 10 to 90%RH, Max Resolution 0.1% RH, Basic Accuracy ±3% RH
• Temperature (internal): Range -4 to 122°F, Max Resolution 0.1°, Basic Accuracy ±1.8°F or ±1°C
• Temperature (external): Range -328 to 2498°F, Max Resolution 0.1°, Basic Accuracy ±0.3% or ±1.8°F/±1°C
• Dew Point: -90.4 to 122°F
• Wet Bulb: -6.9 to 122°F
• Dimensions: 9"x2.2"x1.7"
• Weight: 5.3oz