20mA Process Digital Clamp Meter - 

FLUKE 773 milliamp clamp meter is accurate, versatile, and highly portable. It saves time and money by measuring 4–20mA signals five times faster than with traditional multimeters, and without breaking the loop. That means you can troubleshoot a live device without having to power down and possibly miss something going on in the process. It is deal for troubleshooting transmitters, valves and PLCs found in process plants. The 773 allows you to connect to a mA loop in a traditional series workflow to measure, source, or simulate a control system. And it measures up to 99.0 mA non-contact, including 10 to 50mA signals in older control systems. It also sources and measures DC voltage, so it can be used to troubleshoot voltage input and output devices that accept a 1-5V or 0 to 10V signal. You can detach the clamp section of the meter and use it as a remote jaw, connected to the main body by an extension cable to make it easier to take measurements in tight spaces.