LUTRON Datalogger Temperature and Humidity (MHT-381SD) Automatic

Lutron Air Monitor (MHT-381SD) Relative Humidity & Temperature. DataLogger records onto optional SD card.

• Records onto optional SD card, which later can be downloaded onto PC or equivalent, to view in most compatible spreadsheets.
• Display temperature and humidity on large digital display.
• Low power consumption and long battery life.
• RS232/USB computer interface available.
• Integrated hanging unit.
• Low battery indicator.
• °F or °C selectable.

Specifications:

• Datalogger sampling time interval: 5/10/30/60/120/300/600 seconds or "Auto" (automatic).
  • Default sampling time is 60 seconds.
  • The "Auto" sampling means when the measurement value is changed (by 1% RH or 1 degree), that value will be saved as the data entry.
• Humidity:
  • Range: 10 to 90% RH.
  • Resolution: 0.1% RH.
  • Accuracy:
    • at 70% RH or greater: within (4% of the reading + 1digit).
    • at less than 70% RH: within 4% of the reading.
• Temperature:
  • Range: 32 to 122 ° F.
  • Resolution: 0.1 degree.
  • Accuracy: within 1.5 ° F.
• Power: (6) AAA alkaline batteries or optional AP-9V110 power supply.
• 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 90% RH non-condensing.
• Dimensions: 5.2" x 31" x 1.3".
• Weight: 10 ounces (without batteries installed).