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4-20 mA Process Current Loop Data Acquisition

DATAQ Instruments offers a wide range of environmental 4-20 mA current loop data acquisition products for any application and budget. Choose from Ethernet or USB interfaces, and stand-alone or PC-connected configurations. Included software acquires, displays, reviews, and exports data with ease and without programming. Our hardware and software combinations take you from concept to results in minutes. Most products shown here are voltage mode input devices, but are easily converted to measure 4-20 mA with an inexpensive external shunt resistor that we sell as an accessory (model R250.) This application note shows you how: Learn more about 4-20mA current loop measurements.


Products in the Series

DI-808
Web-based Data Logger
Starting at $1095
DI-808 Voltage and Thermocouple Data Logger
  • Works with Any device
  • Manage and retrieve data from Anywhere, Anytime
  • TC, mV, V, pulse inputs
  • Advanced triggering functions
  • Alarm outputs with email/text alerts
  • Record to Internal or Flash Drive
  • 15V supply for 4-20mA sensors
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DI-2008
V, mV, Thermocouple, Pulse DAQ
Starting at $599.00
DI-2008 USB Voltage and Thermocouple Data Acquisition System
  • 8 differential and isolated channels
  • Voltage or TC type per channel
  • Expandable to 128 mixed channels
  • True 16-bit measurement resolution
  • 7 Digital Ports including rate and count
  • ±10mV to ±50V measurement range
  • 15V supply for 4-20mA sensors
  • Includes WinDaq software
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DI-4718B-E
USB & Ethernet Data Acquisition
$795
DI-4718B Data Acquisition and Data Logger Systems
  • 8 analog inputs
  • 160 kHz max sample rate
  • Any industrial measurement
  • Use isolated 8B amplifier modules
  • Anti-aliasing Filter per Channel
  • Records to PC or USB flash memory
  • Expandable to 128 mixed channels
  • Includes WinDaq software
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DI-4718BX
USB/Ethernet Data Acquisition
$1895
DI-4718Bx Data Acquisition and Data Logger Systems
  • 16 analog inputs
  • 160 kHz max throughput rate per core
  • Any industrial measurement
  • Uses isolated 8B amplifier modules
  • Includes WinDaq, ChannelStretch, ExcelLink, and UtilityPack
  • Anti-aliasing Filter per Channel
  • Expandable to 128 mixed channels
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DI-4718B-E
USB & Ethernet Data Acquisition
$795
DI-4718B Data Acquisition and Data Logger Systems
  • 8 analog inputs
  • 160 kHz max sample rate
  • 12V supply for 4-20mA sensors with DI-8B42
  • Use isolated 8B amplifier modules
  • Anti-aliasing Filter per Channel
  • Records to PC or USB flash memory
  • Expandable to 128 mixed channels
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DI-4108-M
Rugged USB/Ethernet DAQ
Starting at $648.00
DI-4108-I Data Acquisition and Data Logger Systems
  • 8 differential analog inputs
  • Stackable rugged enclosure
  • Easy signal swapping connectors
  • 15V supply for 4-20mA sensors
  • ChannelStretch expansion option included
  • 200mV to 10 V measurement range
  • and all other features from DI-4108-E
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DI-4208-M
Rugged USB/Ethernet DAQ
Starting at $648.00
DI-4208-I Data Acquisition and Data Logger Systems
  • 8 differential analog inputs
  • Stackable rugged enclosure
  • Easy signal swapping connectors
  • 15V supply for 4-20mA sensors
  • ChannelStretch expansion option included
  • 2V to 100 V measurement range
  • and all other features from DI-4208-E
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DI-245
Voltage and Thermocouple DAQ
$349
DI-245 Voltage and Thermocouple Data Acquisition System
  • 4 differential and isolated channels
  • Programmable Voltage or thermocouple type per channel
  • ±10mV to ±50V measurement range
  • Supports types J, K, T, B, R, S, E, N
  • Includes WinDaq Software
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DI-2108-P
High Speed USB DAQ
Starting at $548.00
DI-2108-P High Speed Data Acquisition and Data Logger System
  • 8 differential analog inputs
  • Expandable to 128 mixed channels
  • True 16-bit at 160 kHz throughput
  • Measurement ranges 2.5, 5, 10 V
  • 7 Digital Ports with rate and count
  • High common mode voltage
  • Records to PC or USB flash memory
  • Includes WinDaq software
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DI-4730
USB & Ethernet Industrial Data Acquisition
$3695
DI-4730 Industrial Data Acquisition Systems
  • 8 isolated wide range channels measuring ±10mV to ±1000V
  • Expandable to 128 mixed channels
  • Anti-aliasing Filter per Channel
  • 160 kHz analog throughput rate
  • Records to PC or USB flash memory
  • Includes WinDaq software
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GL260
Stand-alone USB data logger
$1295
GL260 Stand-alone USB data logger
  • 10 isolated analog/4 counter channels
  • Sample intervals from 10ms to 1 hour
  • ±20mV to ±100V programmable ranges
  • Supports TC measurements
  • Record to PC, USB drive, flash
  • Measure RH model B-530
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GL860
Stand-alone Data Logger
$2195
GL860 Stand-alone USB data logger
  • 20 isolated analog/4 counter channels
  • 60V common mode voltage
  • ±20mV to ±100V programmable ranges
  • Supports TC measurements
  • Record to PC, USB drive, flash
  • Measure RH with model B-530
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Accessories

R250
4-20mA Shunt Resistor
$2.99
R250
  • 250 Ω ±0.1% Precision
  • Metal Film, 1/2W, Axial Resistor
  • Exceptionally low noise
  • Low voltage coefficient to ±5 ppm/V
  • Flame retardant coating
  • RoHS compliant
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HMP60
Humidity Sensor
$393.00
HMP60 Humidity Sensor
  • -40 to +60 °C, 0 to 100% RH Measurement Range
  • Rugged IP-65 rated metal construction
  • Low power consumption
  • 2.5 V output
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Industrial Grade 4-20mA Output Pressure Sensors
Starting at $199
Pressure Transducer
  • 100 to 14500 PSI
  • Accuracy: 0.25%
  • 12-30V Supply
  • 4-20mA Linear Output
  • High impact resistance
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High Accuracy -14.5 to 10000 PSIG
4-20mA Output Pressure Transducer
Starting at $79
Pressure Transducer
  • -14.5 to 10000 PSI
  • Accuracy: 0.5%
  • 8-30V Supply
  • 4-20mA Linear Output
  • Shunt Resistor Included
  • Connector and cable included
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4-20mA Output Submersible Level Sensor
Starting at $109
Pressure Transducer
  • Accuracy: 0.5%
  • 12-30V Supply
  • 4-20mA Linear Output
  • 250 Ohm Shunt resistor included
  • 5M cable included
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4-20mA Signal Splitter
$99
Signal Multiplexer
  • Singal splitter for 4-20 mA Sensors
  • 1 Input, 4 Out
  • Isolated Signals
  • 0-300Hz Frequency Range
  • Transmitting Accuracy ±0.1%FS
  • CE Compliance
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DIN-P24 Din Rail Mount Power Supply Module
$35
DIN-P24
  • 24V, 1A Output
  • Perfect Supply for 4-20mA Sensors
  • 100-240VAC Input
  • 35mm DIN Rail
  • CE Compliance
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Videos

Learn how to make 4-20mA current measurements using the R250 shunt resistor.