Power Failure Detector with Waterproof Temperature, Humidity and Short Sensors


Now shipping with one more free sensor: choose the one you want using the drop down menu above.

Enjoy all the benefits of the Power Failure Alert with 3 added sensors: waterproof temperature, humidity, and short (continuity). It comes with visual and audio indicators: red, blue and green LEDs are used to indicate Alarm, Communications, and Running conditions respectively. And an audio tone will sound to indicate an alarm condition. Now with one device you can monitor power outages, temperature and humidity fluctuations as well as see the chart of temperature and humidity measurements for the past 24 hours. Continuity sensor connector can also be used to add a float sensor, a push switch or a door open sensor, all available on MySpool here.



The high-quality waterproof temperature and humidity sensors can be operated in two modes. One mode sends alerts when temperature or humidity goes above or below your thresholds. And the second mode allows you to send data to a ThingSpeak channel for display and analysis. See here for directions on how to setup this free data channel. A display of the last 24-hour temperature measurements is also available on your private web page. All thresholds, schedules and message content is configurable on your private device configuration page.

P4 also accepts two sensors with 2-pin JST connectors, which can be a simple cable for a continuity test (included), a float sensor, a push switch or a door open sensor, all available on MySpool here

Each device can send alerts to one phone number and up to five email addresses. All or some of the email addresses can also be used to receive text notifications. All services are free.

Note: Power ON and OFF alerts can be sent as a text message, email, pushbullet or any combination of the three. Temperature and Humidity alerts are sent only as email or pushbullet notifications. However, you can convert one or more of the email notifications into text messages, see here for instructions.


BASE Power Failure Alert: 

  • Be alerted when power goes out: MySpool Power Failure Alert uses Wi-Fi to send text messages, email or push alerts when power goes off or comes back on
  • Name each device and send notifications to identify the power outlet or location affected
  • Each MySpool Power Failure Alert is independent; no hub is required
  • WiFi access during power outage is required, please check before ordering
  • No fees or subscription costs

Currently all MySpool products are supported in US and Canada only.


P4 Added features
P4 Power Failure Multi-sensor is equipped with both visual and audio indicators:  Red, Blue and Green LEDS are used to indicate Alarm, Communications, and Running conditions respectively.  An audio tone will sound to indicate an alarm condition for all alarms except for Power OFF to conserve internal batteries. 

Be alerted away from home or business 
MySpool Power Failure Alert is a smart device that sends an alert when power failure is detected.  An alert is also sent when power comes back on. That alert is a message, either via email or text, or both.  Power Failure Alert is configured to use your WiFi (see Important Note below). The setup takes a few minutes with a smart phone or a laptop.

No Hub Required 
Each Power Failure Alert works independently with your Wi-Fi network. Multiple devices can be placed in different locations throughout your home or business. Your notifications will include your text for each device that you specify in the device configuration.

No Fees 
There are no fees for using MySpool Power Failure Alert for any notifications. Power Failure Alert purchased on MySpool.com comes with support for 1 telephone number and up to 5 email addresses for alert notifications. To add more telephone numbers without fees, see these directions.

Flexible design 
MySpool Power Failure Alert comes with an extra long 6 foot power cord connected to an enclosure with a transmitter. Power Failure Alert will ignore short duration power fluctuations of less than 2 seconds so that no unnecessary notifications are sent. Note that since no device is permitted to send more than 1 alert per minute, your POWER ON notification may be delayed by up to 1 minute if power comes back on immediately. Each device requires 3 AAA batteries, included. The batteries should last 5 years or more assuming average power outages and fluctuations.

Important Note: one requirement for the Power Failure Alert deployment is that a WiFi network is available when A/C power outlet being monitored loses power. A good example is a UPS backed WiFi router which Power Failure Alert uses to access MySpool cloud servers.