CT305 – 500 A RMS LoRaWAN current sensor with NTC probe and Ø36.6 mm clamp – Milesight | DistrIoT
CT305 – 500 A RMS LoRaWAN current sensor with NTC probe and Ø36.6 mm clamp – Milesight

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CT305 – 500 A RMS LoRaWAN current sensor with NTC probe and Ø36.6 mm clamp – Milesight

Capteur LoRaWAN CT305 Milesight, mesure 500 A RMS avec sonde NTC, pince Ø36,6 mm, configuration USB-C, IP30.

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Description détaillée

CT305 – 500 A RMS LoRaWAN current sensor with NTC probe and Ø36.6 mm clamp – Milesight

General Description

Milesight 's CT305 is a rugged RMS current sensor designed for industrial energy monitoring. It measures currents up to 500 A with high accuracy via an integrated current clamp (Ø36.6 mm). The sensor integrates an NTC temperature probe and communicates via LoRaWAN® for reliable wireless transmission. It also features a USB-C port for configuration and inductive power supply.

Targeted Applications

  • Energy monitoring in industrial and tertiary installations
  • Combined current and temperature measurement on electrical equipment
  • Remote monitoring via LoRaWAN networks
  • Predictive maintenance in demanding environments

Highlights

  • Measures up to 500 A RMS with ±1% accuracy
  • Built-in NTC temperature sensor (-20°C to 100°C)
  • Multi-band LoRaWAN® Class A connectivity
  • Induction power supply: no battery required
  • USB-C port for power, configuration and console
  • Compact IP30 design with easy cable tie mounting

Technical Specifications

Electrical Measurements
Measured parameter RMS current
Sampling frequency 3.3 kHz
Operating frequency 50~60 Hz
Nominal current 500 Arms (primary) / 150 mArms (secondary)
Minimum reported current 30 A (1 min), 19 A (10 min)
Precision ±1%
Resolution 1 mA
Temperature Sensor
Kind NTC
Measuring range -20°C to 100°C
Precision ±1%
Wireless Transmission
Technology LoRaWAN®
Antenna connector 1 × SMA female (50 Ω)
Frequencies CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1/2/3/4
Transmit power 16 dBm (868 MHz), 20 dBm (915 MHz), 19 dBm (470 MHz)
Sensitivity -137 dBm
Fashion OTAA / ABP – Class A
Interface & Configuration
Port 1 × USB Type-C (power supply, console, temperature probe)
Button 1 × Reboot
Indicator 1 × Status/Alarm LED
Configuration USB Type-C or Downlink
Physical Characteristics
Food By induction
Insulation voltage 3 kVac (1 mA/1 min)
Operating temperature Transmitter: -20°C to 70°C / Clamp: -40°C to 55°C
Storage temperature Transmitter: -25°C to 80°C / Clamp: -40°C to 55°C
Relative humidity ≤ 95% (non-condensing)
Protection index IP30
Dimensions Transmitter: 38 × 39.7 × 16 mm / Clamp: 65.52 × 90 × 43 mm
Weight Transmitter: 13.05 g / Clamp: 276.75 g
Cable passage Ø 36.6 mm
Facility Hanging clamp, transmitter in cable clamp mounting
Certifications
Compliance CE, FCC, UL508

Interfaces and Connectors

The CT305 includes a USB-C port for configuration and power supply, an SMA antenna connector, a status LED, a restart button, and a Ø36.6 mm current clamp with NTC probe.

Pack Contents

  • 1 × CT305 Current Sensor
  • 1 × User Guide
  • 1 × Mounting Kit