4-20 mA Current Loop Data Logger

4-20 mA current loop data loggers capture sensor and control data that vary current as a function of measured parameters. Measurements from process current loops are popular in many applications for load, pressure, torque and other mechanical parameters. DATAQ Instruments is an expert in data loggers for process current data applications, and offers a wide range of product solutions for any application. 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.

R250

4-20mA Current Loop Shunt Resistor

$ 2.99

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Description

250 Ω ±0.1% Precision, Metal Film, 1/2W, Axial Resistor
Exceptionally low noise; typically 0.10 μV/V
Low voltage coefficient to ±5 ppm/V
Flame retardant coating. RoHS compliant. Learn More

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DI-245
Voltage and Thermocouple DAQ
$349

• 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-2008
V, mV, Thermocouple, Pulse DAQ
Starting at $599.00

• 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
• Includes WinDaq software

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DI-2108
High Speed USB DAQ
Starting at $199.00

• 4 or 8 differential analog inputs
• 0.4mV resolution
• ±10V measurement range
• 160 kHz throughput rate
• 7 Digital Ports with rate and count
• Records to PC or USB flash memory
• Includes WinDaq software

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DI-4108-E
High Speed USB & Ethernet DAQ
Starting at $ 499.00

• 4 or 8 differential analog inputs
• Expandable to 128 mixed channels
• 16-bit measurement resolution
• ±200mV to ±10V measurement range
• Anti-aliasing Filter per Channel
• 160 kHz analog throughput rate
• Records to PC or USB flash memory
• Includes WinDaq software

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DI-4208-E
High Speed USB & Ethernet DAQ
Starting at $499.00

• 4 or 8 differential analog inputs
• Expandable to 128 mixed channels
• 16-bit measurement resolution
• ±2 to ±100 V measurement range
• Anti-aliasing Filter per Channel
• 160 kHz analog throughput rate
• Records to PC or USB flash memory
• Includes WinDaq software

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DI-2108-P
High Speed USB DAQ
Starting at $449.00

• 4 or 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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EL-USB-4
Stand-alone Current Data Logger
$103.49

• 4-20mA measurement range
• Long-life lithium battery-operated
• 9-hours to >2-year record time
• Time and date stamps all data
• Easy export to Excel
• Includes a set of alligator clips
• Ready to go…nothing else to buy

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DI-4718B-E
USB & Ethernet Data Acquisition
$795

• 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-808
Web-based Data Logger
Starting at $995

• 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 memory or Flash Drive

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GL240
Stand-alone USB data logger
$1095

• 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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GL840-M
Stand-alone Data Logger
$2395

• 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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DI-4730
USB & Ethernet Industrial Data Acquisition
$3695

• 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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Model	Interface	Resolution	Channels	Channel Expansion	Max Sample Rate	Display	Data Storage	Measurement Range	Price
DI-1100	USB	12-bit	4	No	20,000 S/s/Ch	PC	PC	± 10V	$79
DI-2108	USB	12 to 16-bit	4 or 8	No	220,000 S/s Throughput	PC	PC or USB Flash	± 10V	$199.00
DI-4208-U	USB	12 to 16-bit	4 or 8	Up to 128	160,000 S/s Throughput per device	PC	PC or USB Flash	± 2V to ± 100V	$449.00
DI-2108-P	USB	16-bit	4 or 8	Up to 128	160,000 S/s Throughput per device	PC	PC or USB Flash	± 2.5V to ± 10V; 0-5V, 0-10V	$449.00
DI-4108-E	USB and Ethernet	12 to 16-bit	4 or 8	Up to 128	160,000 S/s Throughput per device	PC	PC or USB Flash	± 200mV to ± 10V	$499.00
DI-4208-E	USB and Ethernet	12 to 16-bit	4 or 8	Up to 128	160,000 S/s Throughput per device	PC	PC or USB Flash	± 2V to ± 100V	$499.00
DI-2008	USB	16-bit	8	Up to 128	200 S/s Throughput 2000 S/s with single channel per device	PC	PC	± 10mV to ± 50V	$599.00
EL-USB-4	USB	0.05 mA	1	No	1 S/s	None	Internal	4-20mA	$103.49
DI-710-UH	USB	14-bit	8DI/16SE	No	4,800 S/s Throughput	PC	PC	± 1.25V to ± 10V	$499.00
DI-710-UL	USB	14-bit	8DI/16SE	No	4,800 S/s Throughput	PC	PC	± 10mV to ± 10V	$499.00
DI-710-EH	Ethernet	14-bit	8DI/16SE	No	4,800 S/s Throughput	PC	PC	± 1.25V to ± 10V	$599.00
DI-710-EL	Ethernet	14-bit	8DI/16SE	No	4,800 S/s Throughput	PC	PC	± 10mV to ± 10V	$599.00
DI-710-UHS	USB	14-bit	8DI/16SE	No	14,400 S/s Throughput	PC	PC or SD Card	± 1.25V to ± 10V	$599.00
DI-710-ULS	USB	14-bit	8DI/16SE	No	14,400 S/s Throughput	PC	PC or SD Card	± 10mV to ± 10V	$599.00
DI-718B-U	USB	14-bit	8	No	4,800 S/s Throughput	PC	PC	± 10mV to ± 60V	$595.00
DI-4718B-U	USB	12 to 16-bit	8	Up to 128	160,000 S/s Throughput per device	PC	PC or USB Flash	± 10mV to ± 60V DI-8B module dependent	$695
DI-718B-US	USB	14-bit	8	No	14,400 S/s Throughput	PC	PC or SD Card	± 10mV to ± 60V DI-8B module dependent	$695.00
DI-710-EHS	Ethernet	14-bit	8DI/16SE	No	14,400 S/s Throughput	PC	PC or SD Card	± 1.25V to ± 10V	$799.00
DI-710-ELS	Ethernet	14-bit	8DI/16SE	No	14,400 S/s Throughput	PC	PC or SD Card	± 10mV to ± 10V	$799.00
DI-4718B-E	USB and Ethernet	12 to 16-bit	8	Up to 128	160,000 S/s Throughput per device	PC	PC or USB Flash	± 10mV to ± 60V DI-8B module dependent	$795
DI-718B-E	Ethernet	14-bit	8	No	4,800 S/s Throughput	PC	PC	± 10mV to ± 60V	$795.00
DI-718B-ES	Ethernet	14-bit	8	No	14,400 S/s Throughput	PC	PC or SD Card	± 10mV to ± 60V DI-8B module dependent	$895.00
DI-808	Ethernet	16-bit	8	No	40 S/s/Ch	Browser	Internal, USB flash, Cloud	TC Types J, K, T, B, R, S, E, N ± 10mV to ± 50V	$995
GL240	USB	16-bit	10	No	100 S/s/Ch	Graphing and Digital	PC, SD Card, Internal	± 20mV to ± 100V	$995.00
DI-718Bx	Ethernet	14-bit	16	No	4,800 S/s Throughput	PC	PC	± 10mV to ± 60V	$1395.00
DI-718Bx-S	Ethernet	14-bit	16	No	14,400 S/s Throughput	PC	PC or SD Card	± 10mV to ± 60V DI-8B module dependent	$1495.00
GL840-M	USB and Ethernet	16-bit	20 to 200	Yes	100 S/s/Ch	Graphing and Digital	PC, SD Card, Internal	± 20mV to ± 100V	$2345.00
DI-4730	USB	12 to 16-bit	8	Up to 128	160,000 S/s Throughput per device	PC	PC or USB Flash	± 10mv to ± 1000V	$3695

Videos

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