EM21

Environmental Monitor

The EM21 is a wireless, waterproof, data-logging environmental monitor with temperature and humidity sensors.

Maintain compliance and product integrity by wirelessly monitoring temperature

With precise sensors and an easy-to-install wireless design, Samsara Environmental Monitor is ideal for ensuring food safety and product integrity during transportation, monitoring warehouse conditions, and other applications that rely on environmental data to ensure quality or maintain compliance.

Built to last and withstand harsh environments

IP67 and IP69k rated, the Environmental Monitor is dustproof and waterproof with the ability to withstand high temperature and high-pressure water. The design is as durable as it is sleek, with exceptional resilience to impact. The EM can run for 3+ years (subject to conditions) on a single-use, replaceable AA battery.

Class-leading electronics with multi-year battery life

With the industry's most advanced wireless technology, EMs transmit sensor data in real time to Samsara cellular gateways, enabling operators to see up-to-the-second sensor data over the web and to receive real-time alerts when conditions require their attention. When an EM is deployed out of a gateway's range, it logs data to on-board storage and automatically uploads the data the next time it comes near a gateway. Even with always-on wireless networking and data-logging, the EM runs for three years off of a single AA battery.

Scales from Small Operations to Thousands of Assets

Compact, affordable, and easy to use, Samsara EMs can quickly bring visibility to small operations without IT or engineering complexity. Yet Samsara's scalable cloud infrastructure and enterprise-grade security make the EM an ideal solution for monitoring large-scale operations.

Download DatasheetCE Declaration of Conformity

Sensors

AMBIENT TEMPERATURE
Range: -40° to 60° C (limited by operating range)
Accuracy:-10° to 60° C Typical: ±0.3°, C Max: ±0.4° C -40° C to -10° C Typical: ±0.7°, C Max: ±0.9° C
Factory-calibrated
RELATIVE HUMIDITY
Range: 0-95% RH
Factory-calibrated

Wireless Connectivity

WIRELESS CONNECTIVITY TO SAMSARA POWERED GATEWAYS
Real-time: Sampling every 4 seconds and transmitting new data to Vehicle or Asset Gateways in near real time
Auto-discovery: Automatically detects and connects to any compatible Samsara powered gateway to transmit data
Typical range: 100 ft / 30 m (line of sight). Actual range depends on RF interference, building materials, and physical obstacles

Data Logging

BUILT-IN STORAGE LOGS DATA WHEN GATEWAY CONNECTIVITY IS UNAVAILABLE
Storage capacity: Built-in flash memory logs 30 days of data when Internet connectivity is unavailable
Data upload: Automatic (zero-touch) wireless data upload via Samsara gateways

Environmental Protection

WATERPROOF AND RUGGEDISED FOR HARSH ENVIRONMENTS
IP67-rated for protection against water and dust
IP69k-rated IP69k rated for protection against high temperature and high-pressure water
ISO 16750-3 vibration rated
IK06 impact rated
Not designed for use as a primary fire protection and/or life safety system

Battery

MULTI-YEAR BATTERY LIFE
Typical battery life 3+ years. Actual battery life may be affected by extreme temperature or signal strength.
User-replaceable battery (1 standard AA battery)

License

Requires EM license. License includes hardware, cloud software, ongoing firmware updates, and support.

Volume purchase and multi-year license term discounts available; contact us for details.