Loop-Powered Digital Panel Meter
88-PRO - Laurel Electronics, Inc (Laurel)
The 88-PRO Process Meter may be connected directly to a 4-20 mA, 10-50 mA or 1-5 mA current loop, with no need for additional power to the meter. This is because the meter is powered directly by the current loop, developing a maximum voltage drop of 2.5 V.