CT10x is a LoRaWAN® smart current transformer that clamps onto a single live wire without cutting power or rewiring, delivering wireless energy monitoring for retrofit buildings, electrical panels, and distributed facilities.
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Electrical panels often leave limited installation space, while metal enclosures attenuate LoRaWAN® signals and reduce transmission reliability. CT10x uses a detachable split-core structure that simplifies installation and allows the wireless transceiver to be positioned outside metal enclosures for better LoRaWAN® signal coverage in real-world panel environments.
The compact separable structure fits more easily into narrow cabinet spaces without disturbing adjacent wiring or components.
The detachable transceiver can be positioned outside metal enclosures to reduce signal attenuation and improve LoRaWAN® communication reliability.
Unlike hardwired current transformers, CT10x can be repositioned between circuits without rewiring or service interruption, making it easier to adapt monitoring coverage as facilities and equipment change.
CT10x smart current transformer draws power directly from the current flowing through the wire it monitors. No batteries to replace, no power cables to run. But self-powered means more than just eliminating batteries — it changes how you plan and maintain deployments at scale.
CT10x eliminates battery replacement and external power wiring to reduce long-term maintenance across distributed deployments.
Supports stable monitoring on low-load circuits such as lighting, HVAC fans, and light industrial equipment, with startup current as low as 1.4 A.
Built-in energy storage keeps CT10x operating for up to 12 hours during overnight shutdowns and temporary circuit outages.
Non-Intrusive Wireless Current Transformer Installation
CT10x smart current transformer clamps onto live wires without disconnecting circuits or modifying existing wiring, enabling faster deployment with no operational downtime, no risk of circuit damage or arc exposure, and minimal retrofit effort across existing electrical systems — making it a practical foundation for facility-wide energy management.
With measurement ranges of 100A, 250A, and 500A, CT10x covers a wide range of current monitoring needs, while different wire hole sizes help fit
varied conductor sizes and installation environments.
100A
Φ16 mm
Lighting, office equipment, small HVAC units, and other low-to-mid load single-conductor circuits.
250A
Φ16 mm
Commercial HVAC, compressors, and mixed-load distribution panels.
500A
Φ36.5 mm
Large motors, industrial feeders, chillers, and high-current single-conductor loads.
Looking for a Custom Current Range?
Talk to an ExpertCT10x samples at 3.3 kHz, capturing short-duration current spikes that lower-frequency sensors miss. This matters particularly for dynamic loads, motors, and equipment with changing current profiles.
CT10x calculates accumulated ampere-hours every second and reports the cumulative value at each configured reporting interval. For direct kWh reporting, configure voltage and power factor on the device and CT10x handles the conversion, removing the need for platform-side calculation.
CT10x provides real-time alerts for current threshold, over-current, temperature threshold, and low-voltage conditions, helping operators identify abnormal circuit behavior earlier and maintain more reliable monitoring across distributed electrical systems.
CT10x is designed to operate reliably in industrial environments where space, signal, and cable access are all constrained.
Choose from high-gain, mini stubby, or magnetic antennas to adapt to different signal conditions. For metal cabinets, the magnetic antenna can be positioned outside the enclosure to help improve signal reception.
Extend monitoring from current to cable temperature, with alerts triggered when the wire temperature reaches a set threshold.
Centrally manage devices via bulk commands and keep features up-to-date with FUOTA upgrades, eliminating expensive and time-consuming on-site visits.
CT10x transmits data over LoRaWAN® and MQTT. For integration with BMS or SCADA systems, Milesight gateways such as EG71 can bridge field data to BACnet, Modbus, and other building automation protocols.
Install without power interruption, monitor remotely, and manage devices centrally to simplify commissioning and long-term operation across distributed sites.
Energy Monitoring for Public Venues:
Circuit-Level Visibility Without Operational Disruption
Concert halls run complex electrical loads — lighting, HVAC, audio systems — across circuits that cannot be de-energized during active programming. CT10x clamps onto live wires without interrupting power, giving facility managers circuit-level consumption data to identify wasteful loads and support ESG reporting.
Non-intrusive installation eliminates the need to schedule power shutdowns in venues with near-continuous programming
Circuit-level data supports energy audits and sustainability reporting without disrupting operations
In Practice: Concert Hall in Spain
Monolitic deployed CT101 alongside WS302 sound sensors, AM103 IAQ sensors, and VS133 people counters to create an integrated facility management system for a renowned Spanish concert hall. CT101 provided real-time circuit-level energy monitoring, enabling the operations team to track power consumption and detect anomalies across individual systems.
Energy Baseline and Retrofit Support for Transport Infrastructure
Railway stations operate around the clock across distributed electrical systems where establishing an accurate energy baseline is the prerequisite for any sustainability initiative. CT10x provides wireless, non-intrusive circuit-level monitoring that integrates with existing IoT platforms without disrupting station operations.
One-second ampere-hour tracking enables precise electrical disaggregation to identify the highest-impact targets for energy reduction
LoRaWAN® integration supports digital twin and BMS architectures increasingly used in smart station projects
In Practice: Green Railway Stations in the UK
Twin4Green deployed CT101 across UK station sites as part of a sustainability initiative, integrating sensor data with their digital twin platform via AWS IoT Core. Real-time energy flows fed into 3D station models alongside AM319 air quality, WS302 noise, VS350 people counting, and WS558 lighting control data — giving operators unified visibility over energy and operations.
Read Full Case StudyMachine-Level Power Monitoring Without Production Downtime
Factories typically have facility-level metering but no visibility into individual machine consumption — making it difficult to detect inefficient equipment or schedule predictive maintenance. CT10x installs on live conductors without production interruption, delivering the per-machine data needed for efficiency benchmarking and early abnormality indication.
Self-powered, cable-free deployment reduces wiring work and installation complexity at each monitoring point.
Continuous current monitoring detects abnormal consumption patterns as an early indicator of motor wear or process inefficiency
In Practice: Automotive Manufacturing in Europe
With IoT partner Heliotics, a European automotive manufacturer deployed 30 CT10x units across 10 production machines. Data transmitted via LoRaWAN® to the Heliotics CORE platform, presenting per-machine energy usage and anomaly detection in a centralized dashboard — with no production shutdown required during deployment.
Read Full Case StudyEnergy Sub-Metering for Educational Campuses:
Circuit-Level Visibility Without Infrastructure Modification
University campuses operate distributed electrical systems across multiple buildings but typically lack circuit-level consumption visibility. Retrofitting conventional sub-metering requires electrical work that disrupts active
academic operations.
CT10x installs on live conductors in existing panels without circuit interruption, giving facility teams the data needed to identify high-consuming loads and support net-zero targets.
Non-intrusive deployment across multiple buildings requires no shutdown of classrooms, labs, or common areas
Integration with standard platforms like Chirpstack and InfluxDB enables historical analysis without proprietary software lock-in
In Practice: BCIT, Vancouver, Canada
BCIT deployed CT101 and CT103 across campus building panels, transmitting data via UG65 and UG67 gateways to Chirpstack and InfluxDB. Facility managers gained real-time and historical consumption visibility across buildings, supporting energy optimization and the institution's net-zero emissions goals.
Read Full Case StudyMilesight CT Series delivers non-intrusive current and energy visibility across facilities of varying scale. Whether tracking individual single-conductor loads, monitoring three-phase systems, or enabling high-density multi-circuit sub-metering, it provides a unified LoRaWAN® energy monitoring layer that scales with your infrastructure while reducing wiring work.
CT3xx
Smart Current Transformer
CT3xx
Smart Current Transformer
CTH01
Smart Power Monitor Hub
CTH01
Smart Power Monitor Hub
Traditional wired current transformers require signal cabling back to a panel meter, data logger, or building management system, and often require circuits to be de-energized during installation. CT10x wireless smart current transformer combines split-core current sensing with LoRaWAN® wireless communication, enabling non-intrusive installation on live wires without rewiring or additional signal cabling. This simplifies retrofit deployment, reduces installation effort across distributed facilities, and enables remote current monitoring at scale.
CT10x supports stable operation on low-load circuits and can continue operating for up to 12 hours using internal energy storage when the monitored circuit is temporarily de-energized. Before shutdown, the device sends a low-power alert so operators can distinguish expected power loss from connectivity or device issues.
Yes. Configure the target circuit's nominal voltage and power factor once in the Toolbox application, and CT10x calculates and reports kWh values on-device — removing the need for server-side unit conversion. This makes CT10x usable without custom platform development. Note that CT10x is designed for sub-metering and energy auditing, not utility billing — it is not a certified revenue-grade electricity meter.
CT10x is compatible with standard LoRaWAN® gateways and network servers. Through Milesight gateways, network servers, or third-party integrations, CT10x data can be forwarded to platforms such as MQTT-based applications, cloud services, BMS, or SCADA systems. For BMS integration, Milesight gateways such as EG71 can bridge field data to BACnet, Modbus, HTTP, or MQTT endpoints.
Yes. As a portable current transformer, CT10x uses a split-core clamp-on structure that can be removed and reinstalled on different circuits without rewiring or service interruption. This makes it practical for temporary energy audits, M&V studies, and commissioning checks where permanent installation on every circuit is not justified — as well as for facilities where monitoring priorities shift as equipment or layouts change.
| Electrical Measurement | |
|---|---|
| Detection Parameter | RMS Current |
| Sampling Frequency | 3.3 kHz |
| Working Frequency | 50~60 Hz |
| Rated Primary Current | 100 Arms |
| Rated Secondary Current | 100 mArms |
| Minimum Reporting Current* | 1.5Arms (1min Interval) 1.4Arms (10min Interval) |
| Accuracy | ±1 % (>5Arms), ±3 % (≤ 5Arms) |
| Resolution | 1 mA |
| Temperature Sensor | Sensor type: NTC Measuring range: -20°C ~ 100°C Measuring accuracy: ±1 % |
| Wireless Transmission | |
| Protocol | LoRaWAN® |
| Antenna Connector | 1 × 50 Ω SMA Connector (Center PIN: SMA Female) |
| Frequency | CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4 |
| Tx Power | 16 dBm (868 MHz)/22 dBm (915 MHz)/19 dBm (470 MHz) |
| Sensitivity | -137dBm |
| Mode | OTAA/ABP Class A |
| Others | |
| Button | 1 × Reboot Button |
| LED Indicator | 1 × Status/Alarm Indicator |
| Port | 1 × USB Type-C for Power Supply, Configuration, Console or Cable Temperature Sensor Connection |
| Software | |
| Configuration | USB Type-C or Downlink |
| Advanced Feature | Threshold Alarm, Overrange Alarm, FUOTA |
| Physical Characteristics | |
| Power Supply | 1. Induced current power supply 2. 5V by USB Type-C Port |
| Insulation Voltage | 2.5kVac(r.m.s)(1mA/1min) |
| Color/ Material | Blue, PBT+PC (UL94 V0) |
| Extension Cable Length | 1m |
| Operating Temperature | -20°C~70°C (-4°F~158°F) |
| Storage Temperature | -25°C~80°C (-13°F~176°F) |
| Relative Humidity | ≤ 95% (Non-condensing) |
| Ingress Protection | IP30 |
| Dimensions | 86.5 × 31 × 37.4 mm (3.4 × 1.22 × 1.47 in) Wire Hole: Ф 16 mm (Ф 0.63 in) |
| Weight | 85.65 g |
| Installation | Transceiver: Cable-tie Mounting (under integrated mode) CT Clamp: Suspended on the Testing Conductor |
| Approvals | |
| Regulatory | CE, FCC, UL508 |
*The minimum current to report data under different reporting intervals when the device is powered by the testing conductor. To measure lower currents, the device must be powered via USB.
| Electrical Measurement | |
|---|---|
| Detection Parameter | RMS Current |
| Sampling Frequency | 3.3 kHz |
| Working Frequency | 50~60 Hz |
| Rated Primary Current | 250 Arms |
| Rated Secondary Current | 125 mArms |
| Minimum Reporting Current* | 3Arms (1min Interval) 2.8Arms (10min Interval) |
| Accuracy | ±1 % (>5Arms), ±3 % (≤ 5Arms) |
| Resolution | 1 mA |
| Temperature Sensor | Sensor type: NTC Measuring range: -20°C ~ 100°C Measuring accuracy: ±1 % |
| Wireless Transmission | |
| Protocol | LoRaWAN® |
| Antenna Connector | 1 × 50 Ω SMA Connector (Center PIN: SMA Female) |
| Frequency | CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4 |
| Tx Power | 16 dBm (868 MHz)/22 dBm (915 MHz)/19 dBm (470 MHz) |
| Sensitivity | -137dBm |
| Mode | OTAA/ABP Class A |
| Others | |
| Button | 1 × Reboot Button |
| LED Indicator | 1 × Status/Alarm Indicator |
| Port | 1 × USB Type-C for Power Supply, Configuration, Console or Cable Temperature Sensor Connection |
| Software | |
| Configuration | USB Type-C or Downlink |
| Advanced Feature | Threshold Alarm, Overrange Alarm, FUOTA |
| Physical Characteristics | |
| Power Supply | 1. Induced current power supply 2. 5V by USB Type-C Port |
| Insulation Voltage | 2.5kVac(r.m.s)(1mA/1min) |
| Color/ Material | Blue, PBT+PC (UL94 V0) |
| Extension Cable Length | 1m |
| Operating Temperature | -20°C~70°C (-4°F~158°F) |
| Storage Temperature | -25°C~80°C (-13°F~176°F) |
| Relative Humidity | ≤ 95% (Non-condensing) |
| Ingress Protection | IP30 |
| Dimensions | 86.5 × 31 × 37.4 mm (3.4 × 1.22 × 1.47 in) Wire Hole: Ф 16 mm (Ф 0.63 in) |
| Weight | 85.65 g |
| Installation | Transceiver: Cable-tie Mounting (under integrated mode) CT Clamp: Suspended on the Testing Conductor |
| Approvals | |
| Regulatory | CE, FCC, UL508 |
*The minimum current to report data under different reporting intervals when the device is powered by the testing conductor. To measure lower currents, the device must be powered via USB.
| Electrical Measurement | |
|---|---|
| Detection Parameter | RMS Current |
| Sampling Frequency | 3.3 kHz |
| Working Frequency | 50~60 Hz |
| Rated Primary Current | 500 Arms |
| Rated Secondary Current | 150 mArms |
| Minimum Reporting Current* | 5Arms (1min Interval) 4.7Arms (10min Interval) |
| Accuracy | ±1 % (>5Arms), ±3 % (≤ 5Arms) |
| Resolution | 1 mA |
| Temperature Sensor | Sensor type: NTC Measuring range: -20°C ~ 100°C Measuring accuracy: ±1 % |
| Wireless Transmission | |
| Protocol | LoRaWAN® |
| Antenna Connector | 1 × 50 Ω SMA Connector (Center PIN: SMA Female) |
| Frequency | CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4 |
| Tx Power | 16 dBm (868 MHz)/22 dBm (915 MHz)/19 dBm (470 MHz) |
| Sensitivity | -137dBm |
| Mode | OTAA/ABP Class A |
| Others | |
| Button | 1 × Reboot Button |
| LED Indicator | 1 × Status/Alarm Indicator |
| Port | 1 × USB Type-C for Power Supply, Configuration, Console or Cable Temperature Sensor Connection |
| Software | |
| Configuration | USB Type-C or Downlink |
| Advanced Feature | Threshold Alarm, Overrange Alarm, FUOTA |
| Physical Characteristics | |
| Power Supply | 1. Induced current power supply 2. 5V by USB Type-C Port |
| Insulation Voltage | 2.5kVac(r.m.s)(1mA/1min) |
| Color/ Material | Blue, PBT+PC (UL94 V0) |
| Extension Cable Length | 1m |
| Operating Temperature | -20°C~70°C (-4°F~158°F) |
| Storage Temperature | -25°C~80°C (-13°F~176°F) |
| Relative Humidity | ≤ 95% (Non-condensing) |
| Ingress Protection | IP30 |
| Dimensions | Transceiver: 38 × 34.5 × 16 mm (1.5 × 1.36 × 0.63 in) CT Clamp: 68 × 86 × 41.8 mm (2.68 × 3.39 × 1.65 in) Wire Hole: Ф 36.5 mm (Ф 1.44 in) |
| Weight | Transceiver: 13.05 g CT Clamp: 276.75 g |
| Installation | Transceiver: Cable-tie Mounting (under integrated mode) CT Clamp: Suspended on the Testing Conductor |
| Approvals | |
| Regulatory | CE, FCC, UL508 |
*The minimum current to report data under different reporting intervals when the device is powered by the testing conductor. To measure lower currents, the device must be powered via USB.
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