# Why are sensors sometimes combined as an open/closed event and sometimes separate in the activity history?
**GoSafer Security Knowledge Base**
*This operational reference is organized for GoSafer Security customers and staff. Alarm.com product names are retained where required for technical accuracy.*
## Overview
A sensor's Open and Close events typically get combined into one line in the activity history when the events occur within a few minutes of each other. If a sensor is opened and then not closed again for a longer period of time, there will be two separate events in the activity history: one for the sensor being opened and another for the sensor being closed. For more information about configuring Sensor Activity Monitoring for sensors, see Turn sensor activity monitoring on/off.
## Procedure
A sensor's Open and Close events typically get combined into one line in the activity history when the events occur within a few minutes of each other.
If a sensor is opened and then not closed again for a longer period of time, there will be two separate events in the activity history: one for the sensor being opened and another for the sensor being closed.
For more information about configuring Sensor Activity Monitoring for sensors, see Turn sensor activity monitoring on/off.
## Source and support
For GoSafer Security assistance, visit [gosafersecurity.com](https://gosafersecurity.com/).
Original Alarm.com reference: [https://answers.alarm.com/Customer/Website\_and\_App/System\_Management/System\_History/Why\_are\_sensors\_sometimes\_combined\_as\_an\_open\_closed\_event\_and\_sometimes\_separate\_in\_the\_activity\_history](https://answers.alarm.com/Customer/Website_and_App/System_Management/System_History/Why_are_sensors_sometimes_combined_as_an_open_closed_event_and_sometimes_separate_in_the_activity_history)
Always verify safety, installation, compatibility, and current UI details against the original manufacturer documentation before operational use.