UK industrial technology since 1998 Authorised Milesight distributor Ships from the UK
Milesight Smart Current Transformer: CT101, CT103, CT1
Milesight CT101 / CT103 / CT105 Smart Current Transformer - Image 2
Milesight CT101 / CT103 / CT105 Smart Current Transformer - Image 3

Milesight CT101 / CT103 / CT105 Smart Current Transformer

Authorised Milesight UK Distributor
In stock UKMilesight
Where it sits in the stack
SENSECONNECTSECURECONTROLMANAGE

Price range: £62.85 through £82.30 ex VAT (£75.42 – £98.76 inc. VAT)

The Milesight CT101 is a self-powered LoRaWAN clamp-on current transformer that reports RMS current and accumulated consumption. Its decisive figure is the rated primary current: 100 Arms, through a Ф16 mm wire hole. Use it for circuit-level energy monitoring and machine fault detection in buildings; the clamp fits without de-energising the circuit and needs no battery.

Rated primary current100 Arms (CT101)

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In stock · typically dispatched within 14 working days from the UK

Kits that use this part: Energy monitoring kit · LoRaWAN pilot kit

● Quotes answered within one working day · UK support

Delivery & assurance

  • Ships from the UK
  • £14.25 flat UK delivery
  • Secure checkout — card, Klarna, invoice
  • Manufacturer's warranty

Ships to the UK & EU · VAT invoice provided · Delivery & returns

Questions about this product? Call our UK team: 023 9223 3611

Solutions this product serves
Energy & Net Zero

Description

DATASHEET

CT10x is a LoRaWAN® Smart Current Transformer for monitoring the energy and analyzing consumption remotely.

CT10x provides multiple current options to suit energy monitoring and
support sending threshold alarms.

CT10x is detachable, the compact size and clamp design allow it to be installed in any indoor space quickly and safely without de-energizing a facility, simplifying the installation and saving the cost. Compliant with Milesight LoRaWAN® gateway and Milesight development Platform solution,

CT10x can be monitored via webpage remotely.

CT10x is widely used for energy motoring of smart buildings, machine failure detection and
prevention, etc.

• Features
• Report the RMS current and accumulated current data by minutes
• High measuring accuracy with a sampling frequency of up to 3.3 kHz
• Self-powered, free from batteries or external wires
• Utilize a sampling rate of up to 1s for real-time monitoring and quick alarm response
• Compact size allows for installation in narrow scenarios
• Support flexible detachable design to accommodate various installation environments
• Non-invasive clamp design ensures easy and safe installation without the need for power
de-energizing
• Equipped with LED indicator to indicate working status and alarms
• Support to connect to a temperature sensor via USB for cable temperature measurement
• Compliant with standard LoRaWAN® gateways and network servers
• Compliant with Milesight Development Platform
• Support Firmware Update Over the Air (FUOTA) via Milesight Development Platform

Additional information

Weight 0.277 kg

Milesight CT101 / CT103 / CT105 Smart Current Transformer specifications

Rated primary current100 Arms (CT101)
Rated secondary current100 mArms (CT101)
Minimum reporting current1.5 Arms (1 min interval); 1.4 Arms (10 min interval), when powered by the testing conductor
Detection parameterRMS current
Accuracy±1% (>5 Arms), ±3% (≤5 Arms)
Resolution1 mA
Sampling frequency3.3 kHz
Working frequency50~60 Hz
Temperature sensorNTC, measuring range -20°C ~ 100°C, accuracy ±1%
Protocol / modeLoRaWAN®; OTAA/ABP Class A
FrequencyCN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx power / sensitivity16 dBm (868 MHz) / 22 dBm (915 MHz) / 19 dBm (470 MHz); -137 dBm
Antenna connector1 × 50 Ω SMA connector (centre pin: SMA female)
Port1 × USB Type-C for power supply, configuration, console or cable temperature sensor
Power supplyInduced current power supply, or 5 V via USB Type-C
Insulation voltage2.5 kVac (r.m.s.) (1 mA/1 min)
Wire holeФ16 mm (CT101/CT103)
Dimensions & weight86.5 × 31 × 37.4 mm; 85.65 g (CT101/CT103)
Operating temperature-20°C ~ 70°C, ≤95% RH non-condensing
Ingress protectionIP30
ApprovalsCE, FCC, UL508

Specifications taken from the manufacturer datasheet.

Which version do I need?

The CT10x family differs by rated primary current: CT101 100 Arms, CT103 250 Arms, CT105 500 Arms. CT101 and CT103 share the 86.5 × 31 × 37.4 mm body with a Ф16 mm wire hole; the CT105 is a separate transceiver plus a larger clamp with a Ф36.5 mm hole. Frequency bands include EU868, which UK and EU LoRaWAN uses and which this -868M part is supplied on.

Typical applications for the Milesight CT101 / CT103 / CT105 Smart Current Transformer

  • Smart building circuit-level energy monitoring
  • Machine failure detection and prevention
  • Sub-metering of individual loads
  • Cable temperature monitoring on the same circuit
  • Threshold and overrange current alarms

Buying guides for this product

Energy Monitoring Sensors →

Frequency band

Supplied on EU868, the LoRaWAN band used in the UK and across Europe. That is the default and you do not need to ask for it — the -868M in the part number is the EU868 build.

The same Milesight CT101 / CT103 / CT105 Smart Current Transformer unit also covers IN865 and RU864. Those bands share the 863–870 MHz radio with EU868, so one device can be set to any of them in its own configuration — no different part number needed.

CN470, US915, AU915, KR920 and AS923 are a different radio and therefore a different build. Milesight makes them and we can order them: tell us where the devices are being deployed and we will confirm the part number, price and lead time.

Not sure which band applies where? The Things Network publishes the LoRaWAN frequency plan for every country.

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Milesight CT101 / CT103 / CT105 Smart Current Transformer — frequently asked questions

What is the maximum current the CT101 can measure?

Rated primary current is 100 Arms with a rated secondary of 100 mArms. Within the same family the CT103 is rated 250 Arms and the CT105 500 Arms.

What is the lowest current it will report?

When self-powered from the conductor it reports from 1.5 Arms at a 1-minute interval or 1.4 Arms at a 10-minute interval. To measure lower currents the device must be powered via USB.

Does it need a battery?

No. It is self-powered by induced current from the measured conductor, or can be powered with 5 V through the USB Type-C port. There are no batteries or external supply wires.

Does the circuit have to be switched off to install it?

No. It uses a non-invasive clamp design so it installs without de-energising the facility. Insulation voltage is 2.5 kVac r.m.s. and it carries CE, FCC and UL508 approvals.

Can it also measure cable temperature?

Yes. An NTC temperature sensor connects through the USB Type-C port, with a measuring range of -20°C to 100°C and accuracy of ±1%.

How much does the Milesight CT101 / CT103 / CT105 Smart Current Transformer cost in the UK?

The Milesight CT101 / CT103 / CT105 Smart Current Transformer starts at £62.85 ex VAT from Indiott, with the exact figure depending on the variant you choose. Indiott is a UK distributor and invoices with VAT (PSI Technologies Ltd, VAT GB 730 2340 83). UK delivery is a flat £14.25 per order ex VAT, whatever the weight.

What is the lead time and delivery cost for the Milesight CT101 / CT103 / CT105 Smart Current Transformer?

The Milesight CT101 / CT103 / CT105 Smart Current Transformer is in stock and typically dispatched within 14 working days from the UK. UK delivery is a flat £14.25 per order ex VAT, whatever the weight or how many items you order. We ship to GB and the EU and provide a VAT invoice with every order.

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