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PopisThe DP750 is an excellent solution for outdoor applications where ac power is not available and wide ambient operating temperature is experienced. Using a 3 volt solar cell, the DP750 will operate with as little as 35 lux (lux is a measure of light; a comfortably lit desk is 300 lux). For example, the ability to operate in temperatures as low as -37°C (-35°F) allows the user to monitor temperatures of pipelines in remote sites. Other applications include walk-in refrigerators/freezers and photographic apparatus. Since it is self-powered, the DP750 can also be used near hot tubs and pools where electrical safety is a concern.