Lutron 7-in-1 Environmental Conditions Meter (EM-1910).

• Measures:
  • Sound
  • Light
  • Dew point
  • Wet bulb
  • Heat index
  • Humidity/Temperature
  • Type k Temperature (with optional probe).
• Compact bone shape case design makes it easy to handle with one hand.
• High precision humidity sensor with fast response time.
• Built- in microprocessor circuit assures excellent performance and accuracy.
• Memorize the maximum and minimum value with recall.
• ° F / ° C switchable by pressing button on the front panel.
• Hold function to freeze the current reading value.

• Measures:
  • Light
  • Air flow
  • Dew point
  • Wet bulb
  • Wind chill
  • Heat index
  • Air velocity/Temperature
  • Humidity/Temperature
  • Type k Temperature (with optional probe).
• Compact bone shape case design makes it easy to handle with one hand.
• Low-friction ball bearing vein provides high accuracy at high and low air velocity.
• High precision humidity sensor with fast response time.
• Built- in microprocessor circuit assures excellent performance and accuracy.
• Memorize the maximum and minimum value with recall.
• ° F / ° C switchable by pressing button on the front panel.
• Hold function to freeze the current reading value.

Specifications:

• Display 35 mm x 30 mm LCD display
• Over Input Indication: ''- - - - ''.
• Power Supply UM4-AAA X 3 ( DC 4.5 V battery )
• Power Consumption Approx. DC 5 mA
• Operating Temperature: 32° F to 122° F (0° to 50° C).
  NOTE most batteries are not rated for below -4° F or above 125° F.
• Operating Humidity: less than 85% RH non-condensing.
• Weight: 4.6 ounces (130g) without batteries installed.
• Dimension HWD: 4.7'' x 1.8'' x 1.2'' (120 x 45 x 20 mm).