Environmental Monitor (EM) Sensors

The Samsara Environmental Monitor (EM) is a wireless and waterproof temperature and humidity sensor. Samsara EM-series monitors are ideal for ensuring food safety during transportation, monitoring warehouse conditions, and other applications that rely on environmental data to ensure quality or maintain compliance.

Samsara’s temperature monitoring sensors use thermistor-­based temperature sensors to reliably monitor the temperature without the need for periodic re­calibration. The sensors use a Silicon Labs 7013 module which is factory­ calibrated and tested in a controlled environment. For more information, see the Certificate of Calibration which certifies each Samsara EM sensor has been calibrated to read temperature and humidity according to the specifications noted in the EM ­series datasheet.

Before you can begin using your EMs, Install an Environmental Monitor Sensor, then pair your sensor to start monitoring conditions from your Samsara dashboard.

Install an Environmental Monitor Sensor

To install an Environmental Monitor sensor, you will need:

1. Identify a mounting location within 100 feet of your gateway.

2. Secure the mounting plate of the sensor using the provided screws.

3. Secure the sensor cover to the mounting plate and secure with the top screw.

4. Verify that the sensor is reporting the temperature from the Samsara dashboard.

Sensor Troubleshooting

If you need to troubleshoot your EM21 or EM22, refer to the following steps for your observed behavior.

Issue Observed	Troubleshooting Steps
No temperature data is showing on the dashboard.	Ensure that the sensor is installed within 100 ft of the gateway. Remove the device from its mount and place in close proximity to the gateway in order to regain connectivity. Check the signal strength on the display (hold down the display button) and make sure there are at least three bars. Press and hold the button to see connectivity while returning the device back to its mounting location. Look for physical damage. such as damage to the probe on EM22 or condensation on the display.
Humidity is reading at 100%	Contact Support.
There is no display on the EM	Press on the button for three seconds. If issue persists, contact Support.