Open Source Meter 0.333VAC to 4-20mA Transducer
The OSM-333-0420 transducer is designed to take the 0.333VAC signal from our transformers and output a 4-20mA signal common in process loop systems. This allows you to connect a low cost 4-20mA loop meter, loop powered alarm, relay switch, or other loop powered device to any of our 0.333VAC output current transformers.

The OSM-333-0420 may be purchased bundled with any of our 0.333VAC transformers. Don't want a bundle? Individual pricing is available for any product on our site.

LED and LCD Panel Displays
Open Source Meter offers a selection of 4-20mA current input and low voltage input meter displays in a variety of colors.

Combine one of our displays with our 4-20mA transducer and a CT for a great low cost current meter!

Split Core Current Transformers
Open Source Meter Inc offers a wide selection of split core current transformers ranging from 1Amp to 3000Amp ratings. All of our split core current transformers are UL recognized and have an accuracy of ±1%.

Check out our competative current transformer (CT) pricing! If you find a company offering 0.333VAC output CTs at a lower cost let us know and we'll try to get you a better price.

Solid Core Current Transformers
Solid Core transformers are an excellent lower cost option for new construction and applications where power can be interrupted.

Go to our product page now to check out all of our high quality, low cost solid core CTs.

Open Source 3 Phase Power Meter
At the heart of Open Source Meter Inc is the .NET Micro 3 Phase Energy meter- known as "the Open Source Meter." With flexibility in mind the Open Source Meter is designed to integrate into Ethernet and WiFi networks to provide online metering solutions yet has enough memory and processing power to provide an autonomous solution...
Become a beta participant NOW by calling 1-800-745-8605!