Everspring ST812 Flood Sensor poll / wakeup values?

Can someone tell me what wakeup & poll time values they are seeing for their ST812? I just put one on a Vera Plus running 1.7.2608 and its wakeup intervals are showing around 30 minutes. That seems very often for a battery operated unit that should only report in a flood alert or battery status.

If it detects water, it should report in instantly anyway, so why not sleep for 4 hours or even more?

Just wondering if others are tweaking these to higher numbers or see a higher value in their settings.