Design Note: Rainwater Harvesting

Overview According to the National Weather Service the Pottstown area receives about 43 inches of rainfall annually. That means that the runoff from the roof of a 73,000 sf building like ours is just under 2 million gallons per year. Normally that water would end up in the storm drains, we decided to try and…

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Published:January 17, 2014 View Post

Design Notes

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Case Study: BRAE Rainwater Harvesting

Rainwater runoff from the building rooftop totals approximately 2 million gallons annually. Water collected from just over a quarter of the roof surface combined with high efficiency plumbing fixtures significantly reduce water demands placed on municipal water, sewer and storm water management systems. Rainwater is the preferred water source for process use at Cigas Machine…

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Published:January 14, 2014 View Post

Case Studies

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Cocktail Napkin: Thermistor Calibration

Thermistors are cheap, stable, accurate and durable temperature sensors. Unfortunately they’re also nonlinear so they can be more difficult to use than other technologies. Here is an example of how to use a simple voltage divider and the Steinhart-Hart equation to adapt a standard analog voltage input for a thermistor.

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Published:January 14, 2014 View Post

Cocktail Napkins

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