Environmental MonitorSpecial Order Item: Typically ships in 1 2 weeks. This single environmental instrument measures the four parameters that cause most damage to buildings, valuable objects, documents, etc: ultraviolet and visible light, humidity and temperature. The 765 measures and displays visible light (Lux or Foot candles), UV light (mW M or W lumen), temperature (C or F) and humidity (%RH). This is the world standard instrument for museums, art galleries