The Yocto-4-20mA-Rx device will let you read via USB the instant value returned by any industrial sensor following the 4-20mA standard, as well as record the measures on its internal flash for later retrieval when connected again by USB. The device can automatically map the current reading to a physical measure by applying a proportional rule. The module features two inputs, to connect two independent sensors.

You can find sensors for all kind of physical measures using the standard 4-20mA interface. Transmitting the measure using a 4-20mA current loop makes it possible to get a very precise reading (up to 0.01%), and works even when the sensor is far away from the interface module (several thousands of meters of cable away).

The Yocto-4-20mA-Rx support 2-wires sensors (powered from the current loop) as well as 3-wires sensors (that require an additional power supply with shared ground) and 4-wires sensors (with an isolated power supply). It can even provide up to 80mA to power 3-wires sensors that do not require to much power. The supply voltage is regulated 23V, isolated from the USB bus but common to both inputs.

This device can be connected directly to an Ethernet network using a YoctoHub-Ethernet, to a WiFi network using a YoctoHub-Wireless-g, it can even be connected to a GSM network thanks to the YoctoHub-GSM.

Yocto-4-20mA-Rx Yocto-4-20mA-Rx

USB cables and enclosure to be ordered separately.

CHF 92.02

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Manufacturer Product NumberRX420MA1
Product nameYocto-4-20mA-Rx
USB connectormicro-B
Refresh rate50Hz
Input impedance50Ω
Supported Operating SystemsWindows, Linux (Intel + ARM), Mac OS X, Android
Driversno driver needed
API / SDK / Libraries (USB+TCP)C++, Objective-C, C#, VB .NET, Delphi, Python, Java/Android
API / SDK / Libraries (TCP only)Javascript, Node.js, PHP, Java
Suggested enclosureYoctoBox-Long-Thick-Black-Vents
Cables and enclosuresavailable separately
Made inSwitzerland

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Accessories and related products

YoctoBox-Long-Thick-Black-Vents, Enclosure for Yoctopuce device (long thick black vents)USB-A-MicroB-30, A to micro-B USB data cable, 30cmYoctoHub-Ethernet, Ethernet-enabled hub for Yoctopuce modules


User manual (HTML)
User manual (PDF)
3D file (STEP)
Last Firmware24473 (06/20/2016)
Library for Javascript25534 (10/10/2016)
Library for PHP25534 (10/10/2016)
Library for Objective C25534 (10/10/2016)
Library for C++25534 (10/10/2016)
Library for C#25534 (10/10/2016)
Library for VisualBasic .NET25534 (10/10/2016)
Library for Delphi25534 (10/10/2016)
Library for Python25534 (10/10/2016)
Library for Java25534 (10/10/2016)
Library for Android25534 (10/10/2016)
Library for Command line25250 (08/23/2016)
Virtual Hub for Windows25601 (10/19/2016)
Virtual Hub for Linux, Intel + ARM25601 (10/19/2016)
Virtual Hub for Mac-OS-X25601 (10/19/2016)

Add a comment 3 comments

1 - stefan Monday,october 05,2015 16H38

Is the sensor able to measure values between 0 and 4 mA?

2 - mvuilleu (Yocto-Team)Monday,october 05,2015 16H39

@stefan: yes, you can use the whole range 0-20mA if you want, this is a configuration option

3 - stefan Monday,october 05,2015 17H13

Thank you very much!

Yoctopuce, get your stuff connected.