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Humidity Sensor for Observstory


DeepSkyMan

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I

The Lascar EL2 temperature and Humidity data logger is a excellent unit and they come up often on Ebay for around £25 (ish)

It can be programmed to give visual alarms if whatever limits you choose and the battery life is around 2 years.

 

Lascar EL-USB-2-LCD Relative Humidity and Temperature Data Logger

Edited by Tomatobro
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Just an additional comment. I found that the pier, mount and scope are slow to warm up in the mornings and the cold surface would flash over with condensation. I found a polymer based resistor sensor which underwent a significant output change during the transition from dry to wet. I linked this signal into an alarm which warned me that the pier was wet so go turn on the dehumidifier. If this is of interest I will see if I can locate the supplier and post here.

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