4-20mA Data Loggers

Measure and Record 4-20mA Signals

We have several models of data loggers designed to record 4-20mA signals for machine monitoring applications and many others. These monitors log current for process control applications, recording analog signals at high accuracy.

Our Accsense Wireless Current Data Logger features six (6) 4-20mA inputs along with 2 digital inputs. Another option is to use our Wireless T&D Data Logger which similarly logs and transfers all data to a wireless gateway. Additionally, our Series 3 dataTaker dataloggers can connect with sensors with a 4-20mA output along with many others for a truly flexible solution.

dataTaker Intelligent Data Loggers

dataTaker Intelligent Data Loggers

An extensive line of sophisticated and versatile data loggers with the ability to handle almost any sensor input. They offer powerful alarm and programming capabilities to allow the loggers to process measurements and initiate actions on their own.


  • Built-in web server, FTP, and an enhanced web interface
  • Universal analog channels along with digital, counter and SDI-12 channels
  • Features ethernet, USB, or RS-232 communication with a PC
  • Up to 900 analog inputs with additional expansion modules

AEMC L322  DC Current Data Logger


L322 DC Current Data Logger

  • 2 Input channels with screw terminal connectors
  • Input range of -20 to + 20 mA DC
  • Storage rate of 8x per second to once/day
  • Store up to 240,000 measurements
  • USB communication interface
  • Simple LED status display
  • Battery powered

SQ2040 Data Loggers

SQ2040 Data Loggers

The Squirrel 2040 series provide high performance universal data loggers packed with the same powerful features as the Squirrel 2020 series with additional high speed logging on up to four channels and twice as many universal input channels. This provides great flexibility to handle a wide range of complex and demanding multi-channel applications such as high-speed vehicle testing or engine monitoring.

LogMessage Data Acquisition Systems

LogMessage Data Acquisition Systems

LogMessage Data Loggers are an advanced high speed data logger for demanding applications. They are suitable for stand-alone data logging, product testing, quality and reliability testing, process monitoring, research and development and fault analysis. Virtual internal channels allow calculations, statistics, and various other functions.

  • 120, 600 and 1200 Hz Sampling Rates
  • 1 GB internal memory for 128 million data records
  • Seven different versions with different number of inputs and outputs
  • Monitoring and alarm functions
  • Stand alone operation, network interface and two serial ports
  • Included ProfiSignal GO Software

Novus FieldLogger Data Logger

Novus FieldLogger Data Logger

Novus is a Brazilian based ISO 9001 certified manufacturer of electronic instruments including process indicators, temperature controllers, data loggers and temperature, humidity and pressure transducers.

iLOG RTU Data Loggers

iLOG RTU Data Loggers

iLOG RTU/Data loggers are internet enabled devices specially suited for remote data acquisition, distributed telemetry and remote control. The units act as master devices and send alarms and data files on their own via FTP, email and SMS.

TR-55i-mA Infrared 4-20mA Data Logger


TR-55i-mA Infrared 4-20mA Data Logger

  • Measurement Range: 0 to 20 mA (Operational up to 40 mA)
  • Input Module Included
  • Logging Capacity: Up to 16,000 Readings
  • Low energy consumption for long battery life
  • Downloading Data: Infrared Communication / Optical Communication
  • Warning Monitoring Function
  • Compact Waterproof Type

RTR-505-mA Wireless Voltage Data Logger


RTR-505-mA Wireless 4-20 mA Data Logger

  • Measures 0 to 20mA (Operational up to 40mA)
  • Recording modes: instantaneous or average
  • Storage: 16,000 readings
  • Battery Life: About 10 Months
  • Battery Life (L Model): About 4 Years
  • LCD Display
  • Wireless communication of 150 meters unobstructed

Accsense A1-10 Wireless Current Data Logger


A1-10 Wireless Current Data Logger

Wireless current monitor that can handle up to 6 4-20mA inputs.

  • Setup alarm states and receive alarms via email, cell phone, pager, or landline. Even send the same alarm to multiple locations!
  • Power or internet outage notifications
  • Ambient temperature sensor
  • 6, 4-20 mA Inputs
  • 2 Digital inputs
  • Battery or AC power
  • Up to 250' range
  • 250 Sample buffer

EL-USB-4 Current Data Logger


EL-USB-4 USB Current Data Logger

  • 4-20 mADC Measurement Range
  • User programmable sample rate and alarm limits
  • 32,000 Point storage capacity
  • USB interface for set-up and download
  • Configuration and graphing software included
  • Screw terminal connections
  • Replaceable battery

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