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E300 and E302 Technical Specifications



±0.3°C at 0.1°C resolution; readings available in °C or °F

Temperature probe range

-20° to 70°C (-4° to 158°F)

Monitor internal temperature range

0° to 50°C (32° to 122°F)

Relative humidity readings

0 to 100% RH at ±2% RH at 0.1% resolution


Operating Frequency

2.4 GHz (frequencies vary by region)

Wireless Network Protocol

Frequency hopping self-configuring load-balancing mesh

Data Output

HTTPS to Packet Power EMX running locally or as cloud service; SNMP V1/V2c/V3; Modbus TCP/IP; EtherNet/IP;

Firmware Updates


Typical Transmission Range

10 to 30 meters indoors between any two devices in mesh network


Fully enclosed, fixed configuration

Monitoring Unit to Gateway Radio Range

Up to 25 monitoring units per gateway with battery powered devices

Multi-site Support



128-bit encryption (Gateway)


FCC, Industry Canada and CE / IEC

Environmental & Mechanical

Operating Temperature

0° to 50°C (32° to 122°F)

Device size: 56 mm x 40 mm x 19 mm (2.2 in x 1.6 in x 0.75 in)

Device weight: 20 g (0.7 oz)

Power supply:  Lithium coin cell battery

Estimated battery life: 4+ years

Operating Humidity

10% to 90% non-condensing

Water and Dust Resistance

Indoor use

Module Size

56 mm x 40 mm x 19 mm (2.2 in x 1.6 in x 0.75 in)

Module Weight

20 g (0.7 oz)

Power Supply

Lithium coin cell battery

Estimated Battery Life

4+ years

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