The Invisible Systems 3-Channel Meter (105I) is designed to measure electrical energy in up to 3 circuits using 0.33V split-core current transformers and allows measurement of both current and energy consumption (in KWh).

  • Measures current and energy for main incomers or sub-metering points

  • No direct mains connection required

  • Battery powered

  • Wireless

  • Available as a ‘data as a service’ offering

  • Configurable measure and transmit interval

  • Configured over the air from ISL LoRa™ USB dongle
105I - 45 Deg


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Long Battery Life

Our sensors have been designed to have a battery life of up to 10 years, so you don't have to worry about changing them frequently.


Reduce Costs

Identify problems before damage occurs to stop waste, prevent costly site shutdowns and reduce your fuel consumption. 


A Proven Partner

At Invisible Systems, we've worked in IoT for over 17 years. Our solutions have a proven track record in supporting businesses. 

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Real-Time Online

Together with Real-time Online, the sensors enable constant monitoring, deliver pro-active alerts on threshold breaches and generate bespoke reports


Reduce Carbon Emissions

Our products have been proven to reduce carbon emissions by as much as 83% on some construction sites

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Easy to Install

Choosing wireless sensors and a cloud platform enables you to reduce your installation and maintenance costs.



Configurable high/low thresholds allow different transmit intervals when thresholds are crossed providing advanced edge intelligence to the network, and enable alarms to be generated by Realtime-Online™.


Data from every sensor in your network is reported back through Invisible Systems Big Data architecture either to our Monitoring and Analytics platform Realtime-Online™, or to a partner cloud platform via our API, ensuring that your data is visible, actionable and valuable to your organisation.


The 105I transmitter connects to the cloud via Invisible Systems cellular LoRa™ gateways, providing low power, reliable communication and long battery life. Invisible Systems can provide their in-house built Realtime-Online™ cloud portal to make this an ideal low-cost end-to-end solution.


The ISL105I is a LoRaWAN certified device and Invisible Systems are members of the LoRa alliance. It offers both ABP and OTAA activation options and is designed to work with all LoRaWAN gateways and network servers.




Frequency/Band (LoRa): EU 868Mhz Other regions available on request

Frequency/Band (LoRaWAN): EU863-870 Other regions available on request

Expected range (line of sight): Up to 10km

Power: LoRaWAN 25mW (14 dBm) LoRa: 100mW (20 dBm)


Approvals: CE, FCC, IC, Other regions available on request

FCC ID: Contains module VPYCMABZ

ICID: Contains module 722C-CMABZ



Dimensions (mm): 144 x 65 x 40

Enclosure colour: Black

Enclosure plastic type: ABS

Operating Temp Range: -20°C to +60°C

Operating Humidity Range: 30% RH to 90% RH

Battery: 1 x C-cell (8500 mAh)

Batteries type: Lithium Thionyl Chloride (Non rechargeable)

Expected battery life, 6 hour Tx interval: Up to 10 years

Operating lifetime: Up to 10 years

Power type: Battery 3.6VDC


Measurement interval range: 10 secs - 60 mins

Tx interval range (multiple of measure intervals): 1 min - 6 hours



Transformers: Compatibility with 0.33V current transformers

Ranges: CT sizes available from 5 to 2500A

Connection: No mains voltage connection

Download Datasheet