The way you'd do this would depend upon the metrics/statuses returned by your device.
Monitoring input voltage would work, as would "input source" as in the previous email.
You of course need the device you're monitoring to stay alive to report these things, and for the devices/systems involved in alerting to remain alive (routers, email servers, etc).
Thanks, adam. On 2018-09-06 09:32:21, Thibault Richard thibs@thibs.com wrote: Hello, I’m using an UPS monitored by Observium Observium detect “Input source” with value “Normal state” in normal condition Best Regards Thibault De : observium observium-bounces@observium.org De la part de Ricardo Franco Cantero Envoyé : mercredi 5 septembre 2018 22:08 À : observium@observium.org Objet : [Observium] Power Outage Hi, What would be the best way to measure for a power outage? I see that there is a sensor for voltage. Would a Min Warn value trigger it on time to send a alert? Met vriendelijke groet, Ricardo Franco Cantero