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