Extech Instruments, Hygro-Thermometer, Extech RH490

Extech Precision Hygro-Thermometer -- Highest 2% RH accuracy with Grains Per Pound (GPP) Display

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.

Features and Benefits:

• Less then 30 seconds of RH response time
• Water vapor in GPP
• Dual backlit display
• Simultaneous display of:
  • Humidity/Temperature
  • Humidity/Dew Point
  • Humidity/Wet Bulb
• Slim design with rubberized side grips
• Data Hold and Min/Max functions

• Product Type: Precision Hygro Thermometer
• Includes: Carrying Case, (1) 9 V Battery
• Temperature Rating: -22 to 199 deg F
• Overall Length: 7.8 in
• Overall Width: 1.7 in
• Battery Type: 9 V
• Overall Height: 1.3 in
• Display Type: LCD
• Measuring Range: 0 to 100% RH
• Accuracy: +/-2% RH, +/-1.8 deg F Temperature (Air)
• Resolution: 0.1%, 0.1 deg F Temperature (Air)
• Dew Point: -22 to 199 deg F
• Response Time: 30 s
• Wet Bulb: 32 to 176 deg F
• Water Vapor: 0 to 1120 GPP
• Weight: 1.160
• Warranty: 2 years