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4-20 mA Current Loop Data Loggers

Sensors with 4-20 mA current loop outputs are very common, from torque, pressure, flow, load, and many other types. The following instruments from DATAQ Instruments may either directly measure the output from current loop sensors, or can be easily adapted to do so with inexpensive options as indicated.

DI-145	DI-145 Low Cost USB Starter Kit for Current Loop Measurements Requires R250 Shunt Resistor per 4-20mA current loop channel (non-isolated configuration) Acquires data directly to a PC 4 differential channels Fixed ±10-volt FS measurement range per channel 240Hz maximum sample rate Built-in USB interface ONLY $29
EL-USB-4	EL-USB-4 4-20 mA Current Loop Data Logger Measures a single direct-connected 4-20 mA current Stand-alone operation. Records to built-in memory ±1.0% overall accuracy 0.05 mA resolution
DI-149	DI-149 Low Cost Starter Kit for Current Loop Measurements Requires R250 Shunt Resistor per 4-20mA current loop channel (non-isolated configuration) Acquires data directly to a PC 8 differential channels Fixed ±10-volt FS measurement range per channel Sample rates of <1 to 8,000 Hz Built-in USB interface
DI-155	DI-155 Low Cost Starter Kit for Current Loop Measurements Requires R250 Shunt Resistor per 4-20mA current loop channel (non-isolated configuration) Acquires data directly to a PC 8 fixed differential channels ±2.5 to ±50-volt FS measurement range per channel (software selectable) 8 software-programmable gain ranges per channel Sample rates of <1 to 40,000 Hz Built-in USB interface
DI-710	DI-710 Low Cost, Multi-channel Current Loop Data Logger Requires R250 Shunt Resistor per 4-20mA current loop channel (non-isolated configuration) Programmable 16 single-ended or 8 differential channels Acquires data directly to a PC or to a removable SD memory card 4 selectable gain ranges per channel Sample rates of <1 to 10,000 Hz Built-in USB or Ethernet interface
DI-718B DI-718Bx	DI 718B and DI-718Bx Multi-purpose Current Loop Data Loggers Requires the DI-8B32 4-20mA current loop transmitter isolated amplifier or the DI-8B42 4-20mA current loop transmitter isolated amplifier 8- or 16-channel versions Adapts to most other industrial measurements Records to removable SD memory Records in real time to a connected PC Support USB or Ethernet interfaces
GL220	GL220 Multi-purpose Current Loop Data Logger with Built-in Display Requires R250 Shunt Resistor per 4-20mA current loop channel (isolated configuration) 10-channel capacity Supports direct-connected thermocouples for temperature measurements Supports direct-connected voltages (20 mV to 50 VFS) for general-purpose measurements Supports four alarm outputs Built-in, full color WVGA display Stand-alone or PC-connected operation Built-in data storage memory, expandable with USB thumb drives Built-in USB interface
GL820	GL820 Multi-purpose Current Loop Data Logger with Built-in Display Requires R250 Shunt Resistor per 4-20mA current loop channel (isolated configuration) 20-channel capacity, expandable to 200 channels Supports direct-connected thermocouples and RTDs for temperature measurements Supports direct-connected voltages (20 mV to 50 VFS) for general-purpose measurements Supports four alarm outputs Built-in, full color WVGA display Stand-alone or PC-connected operation Built-in data storage memory, expandable with USB thumb drives Built-in USB and Ethernet interfaces
DI-720	DI-720 Advanced Instrument for Current Loop Measurements Requires R250 Shunt Resistor per 4-20mA current loop channel (non-isolated configuration) Acquires data directly to a PC Programmable 32 single-ended or 16 differential channels 4 selectable gain ranges per channel Supports ±1.25, 2.5, 5, 10-volt FS per channel Sample rates of <1 to 200,000 Hz Built-in USB or Ethernet interface Ethernet interface daisy chains to support synchronous and distributed voltage measurements.
DI-722	DI-722 Hardened Instrument for Current Loop Measurements Requires R250 Shunt Resistor per 4-20mA current loop channel (non-isolated configuration) Acquires data directly to a PC 32 differential channels Input protection to 120 vrms per channel 4 selectable gain ranges per channel Supports ±2.5, 5, 10, 20-volt FS per channel Sample rates of <1 to 50,000 Hz Built-in USB or Ethernet interface Ethernet interface daisy chains to support synchronous and distributed voltage measurements.
DI-730	DI-730 Extended Range Current Loop Measurements Requires R250 Shunt Resistor per 4-20mA current loop channel (isolated configuration) Acquires data directly to a PC 8 differential channels 6 selectable gain ranges per channel Supports ±10 mV, 100mV, 1 V, 10 V, 100 V, 1,000 V full scale measurements per channel Sample rates of <1 to 150,000 Hz Built-in USB or Ethernet interface Ethernet interface daisy chains to support synchronous and distributed voltage measurements.
MT100	MT100, Multi-channel Current Loop Data Logger with Built-in Display Requires R250 Shunt Resistor per 4-20mA current loop channel (isolated configuration) 10-channel capacity, isolated Supports direct-connected thermocouples and RTDs for temperature measurements Supports direct-connected voltages (20 mV to 50 VFS) for general-purpose measurements Supports four alarm outputs Built-in, full color WVGA display Stand-alone or PC-connected operation Built-in data storage memory, expandable with USB thumb drives Built-in USB and Ethernet interfaces
DI-788	DI-788 Expandable, Multi-channel Current Loop Measurements Requires the DI-8B32 4-20mA current loop transmitter isolated amplifier or the DI-8B42 4-20mA current loop transmitter isolated amplifier Acquires data directly to a PC 32 isolated channels Expandable to 240 channels Sample rates of <1 to 150,000 Hz Built-in Ethernet interface Ethernet interface daisy chains to support synchronous and distributed voltage measurements.