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EHELP: We need a relay that can withstand high DC current at high voltages

EHELP: We need a relay that can withstand high DC current at high voltages

Q: My Model 330R process monitor with display has configurable threshold output relays that I need to set in order to activate a 125Vdc battery powered circuit which is part of a failsafe control room application. How would I set these up when standard instrument relays are rated at 125/240Vac and 24Vac/dc?

Published: May 23, 2016

EHELP: Alarm Tank Level Changes with the SPA2

EHELP: Alarm Tank Level Changes with the SPA2
Q: I want to install a 4-20mA pressure transducer that shows the tank level with an alarm to alert if it is outside the controlled level. With the same signal I want to display the level, alert of level loss, and shut down the pumps if the level reaches a critical point.
Published: March 8, 2016

555 Controller Handles Simple or Complex Chlorination and Dechlorination Jobs

555 Controller Handles Simple or Complex Chlorination and Dechlorination Jobs
Learn how the 555 can handle the most sophisticated and demanding chlorination and dechlorination applications including complicated compound loop control.
Published: January 7, 2015
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